TY - JOUR A1 - Eberle, Arno A1 - Sievert, Rainer A1 - Schiller, Wolfgang Arno T1 - Flip-Chip-Lotbumps thermisch-zyklisch belastet - Einfluß des Substratmaterials auf das viskoplastische Verhalten von Flip-Chip-Lotbumps PY - 1998 SN - 0025-5300 VL - 40 IS - 9 SP - 350 EP - 352 PB - Carl Hanser Verlag CY - München AN - OPUS4-33715 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer A1 - Schiller, Wolfgang Arno T1 - Numerical investigation on the influence of different substrate materials on the viscoplastic behaviour of flip chip solder bumps N2 - The finite element method was used to simulate the thermo-mechanical behaviour of a flip chip under thermocyclic loading between -55°C (-67°F) and 125°C (257°F). In order to simulate realistically the inelastic material response of the solder bump, Chaboche's viscoplastic material model instead of a classical ORNL-theory was implemented into the finite element code ABAQUS and applied to a flip chip configuration. This so-called unified constitutive model is able to describe the Bauschinger effect as well as the creep/plasticity interaction. Herewith the influence of the substrate material on the inelastic deformation behaviour of a tin-lead solder bump was analysed. A comparison is given with respect to the influence of the two substrate materials namely Al2O3 and our self-developed Low Temperature Co-fired Ceramics (LTCC) on the inelastic response of the Sn60Pb40 eutectic solder material. It may be shown that the thermoelastic behaviour of the LTCC substrate significantly reduces the cyclic stresses in the bump compared to Al2O3 as well as the cumulative inelastic strain which is responsible for the development of damage and hence flip chip failure T2 - International symposium on advanced packaging materials 2000 CY - Braselton, Georgia, USA DA - 06.03.2000 PY - 2000 SN - 0-930815-59-9 DO - https://doi.org/10.1109/ISAPM.2000.869253 SP - 112 EP - 117 AN - OPUS4-33716 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer T1 - Verifizierung von Flip-Chip-Demonstratoren unter Verwendung belastbarer Materialkennwerte T2 - Öffentliches Status-Seminar "Projekt SIMIKO" CY - München, Deutschland DA - 2000-09-29 PY - 2000 AN - OPUS4-976 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Eberle, Arno A1 - Klingbeil, Dietmar A1 - Schicker, Johannes T1 - The calculation of dynamic JR-curves from the finite element analysis of a Charpy test using a rate-dependent damage model N2 - A two-dimensional analysis of the Charpy V-notch specimen subjected to impact loading, according to the standard DIN EN 10045-1, is carried out, using a transient explicit dynamic finite element program. An elastic-viscoplastic, temperature dependent, constitutive relation for a porous plastic solid based on the Gurson damage model is developed. Ductile fracture of the matrix material will be described by the nucleation and subsequent growth of voids to coalescence. An updated Lagrange–Jaumann formulation is employed accounting for large strain and rotation. The discretization is based on four-node plane strain solid elements with one Gauss point. The equations of motion are integrated numerically by an explicit integration algorithm utilising a lumped mass matrix. The predictions of the numerical analysis in terms of force deflection response, crack resistance behaviour and deformation energy absorbtion are compared with results from Charpy tests which were carried out according to the low-blow technique. PY - 2000 SN - 0029-5493 SN - 1872-759X VL - 198 IS - 1-2 SP - 75 EP - 87 PB - North-Holland Publ. Co. CY - Amsterdam AN - OPUS4-995 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klingbeil, Dietmar A1 - Eberle, Arno A1 - Baer, Wolfram A1 - Wossidlo, Peter A1 - Häcker, Ralf ED - François, D. ED - Pineau, A. T1 - The calculation of dynamic JR-curves from 2D and 3D finite element analyses of a charpy test using a rate-dependent damage model T2 - Charpy Centenary Conference CY - Poitiers, France DA - 2001-01-02 PY - 2001 SN - 0-08-043970-5 SN - 1566-1369 N1 - Serientitel: ESIS publication – Series title: ESIS publication IS - 30 SP - 403 EP - 410 PB - Elsevier CY - Amsterdam AN - OPUS4-1928 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bösel, Dieter A1 - Baer, Wolfram A1 - Eberle, Arno A1 - Klingbeil, Dietmar T1 - Stand der Entwicklung von Key Curve Einprobenverfahren zur Ermittlung dynamischer Risswiderstandskurven an duktilen Gusseisenwerkstoffen KW - Dynamische Bruchmechanik KW - Risswiderstandskurve KW - Einprobentechnik KW - Gusseisen mit Kugelgraphit KW - Dynamic fracture mechanics KW - Crack resistance curve KW - Single specimen method KW - Ductile cast iron PY - 2008 SN - 1616-4687 SP - 73 EP - 81 AN - OPUS4-16709 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Baer, Wolfram A1 - Bösel, Dieter A1 - Eberle, Arno A1 - Klingbeil, Dietmar ED - Jaroslav Pokluda, ED - Petr Lukás, ED - Pavel Sandera, ED - Ivo Dlouhý, T1 - On the development of key curve methods for the determination of dynamic crack resistance curves of ductile cast iron (DCI) T2 - 17th European Conference on Fracture (ECF17) - Multilevel Approach to Fracture of Materials, Components and Structures CY - Brno, Czech Republic DA - 2008-09-02 KW - Dynamic crack resistance curve KW - Key curve method KW - Ductile cast iron PY - 2008 SN - 978-80-214-3692-3 SP - 492 EP - 498 PB - VUTIUM Brno AN - OPUS4-17909 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bettge, Dirk A1 - Klinger, Christian A1 - Ell, Matthias A1 - Klingbeil, Dietmar A1 - von Oppel, Kay A1 - Singh, Kai A1 - Eberle, Arno A1 - Engelhardt, Monika A1 - Bogel, Bärbel A1 - Saliwan Neumann, Romeo T1 - Schadensanalyse an Rohrbögen von Dampferzeugeranlagen T2 - VGB-Fachtagung "Dampferzeuger, Industrie und Heizkraftwerke 2006" CY - Würzburg, Deutschland DA - 2006-09-04 KW - Schadensanalyse KW - Brüche KW - Dampferzeuger KW - Transportschaden PY - 2006 PB - VGB PowerTech e.V. CY - Essen AN - OPUS4-12817 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Baer, Wolfram A1 - Bösel, Dieter A1 - Eberle, Arno A1 - Klingbeil, Dietmar T1 - Determination of dynamic crack resistance of ductile cast iron using the compliance ratio key curve method KW - Dynamic crack resistance curve KW - Ductile cast iron KW - Single-specimen method KW - Key curve KW - Compliance ratio method PY - 2010 DO - https://doi.org/10.1016/j.engfracmech.2009.06.015 SN - 0013-7944 SN - 1873-7315 VL - 77 SP - 374 EP - 384 PB - Elsevier Science CY - Kidlington AN - OPUS4-20822 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Baer, Wolfram A1 - Eberle, Arno A1 - Klingbeil, Dietmar ED - Klingbeil, D. ED - Vormwald, M. ED - Eulitz, K.-G. T1 - The impact of ductile cast iron fracture behaviour on dynamic fracture mechanics R-curve testing using key curve methods N2 - Dynamic fracture mechanics characteristics are required for design and safety proof of advanced ductile cast iron (DCI) components. In this paper, the analytical compliance ratio (CR) and numerical finite element (FE) key curve methods were investigated for dynamic Rcurve testing. Two DCI materials, a purely ferritic and a ferritic one with 18 % of pearlite, were tested at room temperature (RT) and -40 °C. The special focus is on the impact of the materials damage and fracture behaviour on performance and limitations of the investigated methods. Systematic metallographic and fractographic microstructural analyses were performed accompanying the test program. Summarizing systematics of the specific damage behaviour and fracture mechanisms were developed taking microstructure, loading rate, specimen geometry and test temperature into account. There has been a change from ductile to brittle fracture mechanism observed at -40 °C with ferritic DCI and even at RT with ferritic-pearlitic DCI. The ferritic-pearlitic DCI did not show Rcurve behaviour at -40 °C and only single Juc values could be determined. Furthermore, with ferritic-pearlitic DCI, random pearlite shares in the ligament caused the relation between loading rate, force-deflection record and crack extension not to remain uniquely defined. Therefore, the FE key curve method proofed not to be applicable since the FE model was based on homogeneous isotropic material and ductile failure mode only. The analytical CR key curve method worked well only with selected combinations of microstructure, specimen geometry and temperature. In summary it has to be concluded that a robust, accurate and sufficiently simple dynamic key curve method that was suited for application in quality control of industrial relevant DCI qualities cannot be provided currently. T2 - 18th European conference on fracture (ECF 18) - Fracture of materials and structures from micro to macro scale CY - Dresden, Germany DA - 2010-08-30 KW - Damage and fracture behaviour KW - Ductile cast iron KW - Dynamic crack resistance curve KW - Key curve PY - 2010 SN - 978-3-00-031802-3 IS - Paper 160 SP - 1 EP - 8 AN - OPUS4-22273 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bettge, Dirk A1 - Klinger, Christian A1 - Klingbeil, Dietmar A1 - Eberle, Arno T1 - Investigations on the breakdown of a heat recovery steam generator during the initial operation run N2 - Several years ago, in 2003, an industrial heat recovery steam generator in charge of generating process steam in a petrochemical refinery was installed and prepared for initial operation. The steam generator enclosed an evaporator section and a superheater section consisting mainly of bundles of tubes with the longest up to several metres in length. During initial operation test runs severe leakages in the evaporator and superheater modules became noticeable. The test runs were stopped and after disassembly, through-wall cracks in several tube bends were found. BAM was commissioned to carry out the investigations in order to find out the reasons for the failure of the tubes. During on-site inspection a number of relevant damaged components and parts were selected and taken away to the laboratories for detailed inspection. Planned analyses were to comprise metallographic as well as fractographic investigations, mechanical fatigue testing and experimental as well as finite element vibration analyses on specimens and components. Soon, the fracture mechanism was found to be mechanical fatigue due to the fact that the examined fracture surfaces showed the very characteristic beachmarks and colouring patterns. To identify the particular loading and time at which crack initiation and crack propagation took place, experimental and numerical vibration analyses of specific tubes as well as mechanical fatigue tests on tube bends were carried out. Thus it was possible to identify the eigenfrequencies of individual tubes, to estimate the dynamic response as well as the nominal stresses and, hence, experimentally characterise the in-service fatigue strength of the components. Mechanical and thermal comparative tests on tube bends were performed simulating the conditions during the initial test run in order to get crack surfaces comparable to that of the originally damaged components. Thereby it became obvious that the fatigue cracks were initiated by vibrations the tube bundles were exposed to during rail transport from the manufacturer’s site to the place of installation. Based on these results, the damaged components could be repaired or exchanged without modification of the construction, but the rules relating packaging and securing for shipping had to be revised. KW - Steam generator KW - Fatigue failure KW - Vibration analysis KW - Vibrations due to shipping KW - Transport failure KW - Fatigue PY - 2014 DO - https://doi.org/10.1016/j.engfailanal.2013.12.005 SN - 1350-6307 SN - 1873-1961 VL - 43 IS - Special Issue 'A Tribute to Prof. A. Martens' SP - 253 EP - 270 PB - Elsevier Science Publ. CY - Oxford AN - OPUS4-31490 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klein, Ulrich A1 - Zunkel, Astrid A1 - Eberle, Arno T1 - Breakdown of heat exchangers due to erosion corrosion and fretting caused by inappropriate operating conditions N2 - Damage analyses on two heat exchanger units showed that in both cases inappropriate flow conditions of media caused very different failure mechanisms that resulted in irreparable damage. The first incident was the breakdown of an unalloyed steel condenser, which operated in a coal-fired power plant. A considerably high number of tubes successively leaked. Metallography identified lines of segregation in the microstructure of the tube walls, thus, giving evidence that both uniform corrosion and erosion corrosion caused by low-pressure wet steam were the root cause. The second incident was the breakdown of a recuperator made from chromium–nickel steel due to mechanical damage to tubes and baffle. This unit operated as part of a pilot plant to regain heat from the drying process of sewage sludge. It turned out that soiled vapour caused clogging of the cross-sectional area and therefore accelerating the flow velocity of the vapour. This inappropriate operating condition caused the tubes to oscillate so severely that they even banged together. Abrasive wear especially at the intersection through the holes of the baffle damaged the tubes and the whole unit irreparably. KW - Corrosion KW - Condenser KW - Recuperator KW - Soiled media KW - Leakage of tubes PY - 2014 DO - https://doi.org/10.1016/j.engfailanal.2014.03.019 SN - 1350-6307 SN - 1873-1961 VL - 43 IS - Special Issue 'A Tribute to Prof. A. Martens' SP - 271 EP - 280 PB - Elsevier Science Publ. CY - Oxford AN - OPUS4-31597 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer A1 - Schubert, A. ED - Winkler, T. ED - Schubert, A. T1 - On the influence of two different underfill materials on the inelastic thermo-cyclic response of a flip-chip solder bump N2 - The finite element method was used to simulate the thermo-mechanical behaviour of a solder bump configuration on Al2O3 substrate under thermo-cyclic loading between -55 °C and 125 °C. Chaboche's viscoplastic material model was used to describe the Bauschinger effect and the creep/plasticity interaction for the tin-lead solder material. The influence of two different viscoelastic underfill materials (Epoxy+50 % SiO2, Epoxy+70 % SiO2) on the inelastic deformation of the tin-lead solder was analyzed and compared. It may be shown that the thermally matched 'hard' underfiller (Epoxy+70 % SiO2) significantly reduces the accumulated inelastic strain in the bump compared to 'soft' underfiller or no underfill material. On the other hand, the maximum lateral normal stress will increase slightly. PY - 2015 SP - 471 EP - 480 AN - OPUS4-33859 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno T1 - Simulation der thermo-mechanischen Belastung eines Chipaufbaus während des Thermo-Kompressions-Bondens unter bruchmechanischen Aspekten T2 - 27. Vortragsveranstaltung des DVM-Arbeitskreises Bruchvorgänge PY - 1995 SN - 0943-3473 SP - 321 EP - 334 AN - OPUS4-34622 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Klingbeil, Dietmar A1 - Schicker, Johannes T1 - Die Berechnung dynamischer JR-Kurven aus der FE-Simulation des Kerbschlagbiegeversuchs unter Einbeziehung eines geschwindigkeitsabhängigen Schädigungsmodells T2 - 29. Tagung des DVM-Arbeitskreises Bruchvorgänge CY - Stuttgart, Germany DA - 1997-02-25 PY - 1997 N1 - Serientitel: DVM-Bericht – Series title: DVM-Bericht IS - 229 SP - 325 EP - 334 PB - DVM CY - Berlin AN - OPUS4-34624 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer A1 - Schiller, Wolfgang Arno T1 - Flip Chip Lotbumps thermisch-zyklisch belastet - Einfluss des Substratmaterials auf die Zuverlässigkeit mikromechanischer Aufbauten T2 - Hannover Messe CY - Hannover DA - 1999-04-19 PY - 1999 AN - OPUS4-33686 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer T1 - Numerical Analysis of a Flip Chip Structure Bearing Deep Cracks T2 - International Congress on Advanced Materials and Processes CY - München DA - 2001-10-01 PY - 2001 AN - OPUS4-33687 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Schicker, Johannes A1 - Klingbeil, Dietmar T1 - The calculation of dynamic JR-curves from the finite element analysis of a Charpy test using a rate-dependent damage model T2 - German-Japanese seminar (GJS 97 CY - Stuttgart DA - 1997-09-29 PY - 1997 AN - OPUS4-33712 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Brocks, Wolfgang A1 - Eberle, Arno A1 - Fricke, S. A1 - Veith, Helmut T1 - Large stable crack growth in fracture mechanics specimens PY - 1994 SN - 0029-5493 SN - 1872-759X VL - 151 SP - 387 EP - 400 PB - North-Holland Publ. Co. CY - Amsterdam AN - OPUS4-33713 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer ED - Michel, B. ED - Winkler, T. T1 - Viscoplastic analysis of a solder-bump-configuration at thermo-cyclic loading T2 - Micro Mat '97 - International conference and exhibition micro materials CY - Berlin, Germany DA - 1997-04-16 KW - Hardening and creep KW - Constitutive modeling KW - Determination of material parameters KW - Hysteresis loops KW - Relaxation behaviour PY - 1997 SN - 3-932434-05-6 SP - 283 EP - 286 AN - OPUS4-33714 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Eberle, Arno A1 - Häcker, Ralf A1 - Klingbeil, Dietmar A1 - Wossidlo, Peter T1 - Experimentelle und numerische ERmittlung dynamischer Risswiderstandskurven im Kerbschlagbiegeversuch N2 - Die bruchmechanische Beurteilung von Komponenten erfordert die Kenntnis von Risswiderstandskurven, die jedoch häufig aufgrund fehlenden Probenmaterials nicht zur Verfügung stehen. Vielmehr sind typische werkstofftechnische Kennwerte verfügbar, wie Streckgrenze, Zugfestig, Gleichmaßdehnung, Bruchdehnung sowie die Kerbschlagarbeit in der Hochlage und die laterale Breitung von Kerbschlagbiegeproben. Das Materialmodell von Gurson beschreibt duktiles Risswachstum mit den Stadien Hohlraumentstehung, Hohlraumwachstum und Koaleszenz benachbarter Hohlräume bis zum makroskopischen Riss. Die Materialparameter des Gurson-Modells sind abhängig vom Werkstoff und der Temperatur, jedoch nicht von der Probengeometrie und Belastungsgeschwindigkeit, was eine Übertragung zwischen quasistatisch belasteten Bruchmechanikproben unterschiedlicher Geometrie und schlagartig belasteten Kerbschlagbiegeproben erlaubt. Im vorliegenden Beitrag wird eine Methode zur Konstruktion von Risswiderstandskurven vorgestellt, die auf den grundlegenden Daten des Zugversuchs und der Kenntnis der Fließkurve basiert. Die Fließkurve bei dynamischer Belastung wird durch erprobte Vorgehensweisen ermittelt, die auf der Analyse der dann erhöhten Aktivierungsenergie von Versetzungen basieren. Die Parameter der duktilen Schädigung werden im wesentlichen durch die Simulation von Versuchen an gekerbten Rundzugproben und des Kerbschlagbiegeversuchs bzw. der Anpassung an die Kerbschlagarbeit in der Hochlage bestimmt. Damit sind die Parameter der duktilen Schädigung bekannt, so dass durch die Simulation duktilen Rissfortschritts in Bruchmechanikproben die erforderlichen J-Risswiderstandskurven zur Verfügung gestellt werden können, was die Anwendung des klassischen J-Konzepts erlaubt. Wegen der Geometrieunabhängigkeit der ermittelten Materialparameter ist auch die direkte Anwendung des Gurson-Modells zur Sicherheitsanalyse angerissener Bauteile durchführbar. PY - 2001 SN - 0933-5137 SN - 1521-4052 VL - 32 IS - 6 SP - 532 EP - 538 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-33718 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno T1 - Simulation der thermo-mechanischen Belastung eines Chipaufbaus während des Thermo-Kompressions-Bondens unter bruchmechanischen Aspekten T2 - 27. Vortragsveranstaltung des DVM-Arbeitskreises Bruchvorgänge CY - Köln-Porz DA - 1995-02-14 PY - 1995 AN - OPUS4-33688 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Klingbeil, Dietmar A1 - Schicker, Johannes T1 - Die Berechnung dynamischer JR-Kurven aus der FE-Simulation des Kerbschlagbiegeversuchs unter Einbeziehung eines geschwindigkeitsabhängigen Schädigungsmodells T2 - 29. Tagung des DVM-Arbeitskreises Bruchvorgänge CY - Stuttgart DA - 1997-02-25 PY - 1997 AN - OPUS4-33689 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer T1 - Numerical Analysis of an Electronic Structure Beering Deep Cracks T2 - Micromat 2000 CY - Berlin DA - 2000-04-17 PY - 2000 AN - OPUS4-33690 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer T1 - Viscoplastic Analysis of a Solder-Bump Configuration at Thermo-Cyclic Loading T2 - MicroMaterials Conference "MicroMat 1997" CY - Berlin DA - 1997-04-16 PY - 1997 AN - OPUS4-33696 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Aurich, Dietmar A1 - Eberle, Arno A1 - Guo, Tianmin A1 - Künecke, Georgia A1 - Moussavi Zadeh, Ghasem A1 - Veith, Helmut A1 - Wobst, Klaus T1 - Analyse und Weiterentwicklung bruchmechanischer Versagenskonzepte - Lokales Rißwachstum, Ermittlung des Riß-Widerstandsverhaltens aus der Kerbschlagarbeit N2 - Schwerpunkte sind die Untersuchungen zur Fortführung der Analyse des Einflusses der Mehrachsigkeit des Spannungszustandes auf das Risswiderstandsverhalten, um damit das lokale stabile Risswachstum in Bauteilen besser verstehen und sicher beurteilen zu können sowie die Weiterentwicklung des Verfahrens zur Bestimmung von Risswiderstands - Kennwerten aus dem Kerbschlagversuch. PY - 1993 SN - 3-89429-329-2 SN - 0938-5533 SP - FB 192, 1 EP - 170 PB - Wirtschaftsverlag NW - Verlag für neue Wissenschaft GmbH CY - Berlin AN - OPUS4-33810 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer T1 - Numerical analysis of an electronic structure bearing deep cracks N2 - The successive fatigue failure process, i.e. crack initiation and growth up to electrical failure, has been investigated for a flip chip configuration. A cracked and uncracked solder bump was analysed using an unified viscoplastic constitutive model (Chaboche). The electrical failure of a bump seems to be reached in general not before a deep crack has grown into the bump. In order to update the actual loading situation two different cracked structures were calculated. T2 - MicroMat 2000 - 3rd International conference and poster exhibition Micro Materials CY - Berlin, Germany DA - 17.04.2000 PY - 2000 SN - 3-932434-15-3 SP - 582 EP - 585 AN - OPUS4-33827 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Klingbeil, Dietmar A1 - Schicker, Johannes T1 - The calculation of dynamic JR-curves from finite element analysis of a Charpy test using a rate-dependent damage model T2 - GJS 97 - German-Japanese seminar CY - Stuttgart, Germany DA - 1997-09-29 PY - 1997 SN - 0029-5493 SP - 75 EP - 87 AN - OPUS4-33828 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer A1 - Schiller, Wolfgang T1 - Numerical Investigation on the Influence of Different Substrate Materials on the Viscoplastic Behaviour of Flip Chip Solder Bumps T2 - International Symposium and Exhibition on Advanced Packaging Materials CY - Braselton, Georgia (USA) DA - 2000-03-06 PY - 2000 AN - OPUS4-32605 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eberle, Arno A1 - Sievert, Rainer A1 - Schiller, Wolfgang Arno T1 - Verifizierung von Flip Chip Demonstratoren unter Verwendung belastbarer Materialkennwerte T2 - Öffentliches Statusseminar zum Abschluss des Projektes: Werkstoffdatenbank für die Simulation mikroelektronischer Komponenten (SimiKo) CY - München DA - 2000-09-29 PY - 2000 AN - OPUS4-32606 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klingbeil, Dietmar A1 - Moussavi Zadeh, Ghasem A1 - Eberle, Arno A1 - Fricke, S. A1 - Brocks, Wolfgang ED - Kirk, M. ED - Bakker, A. T1 - Numerical simulation of stable crack growth in fracture mechanics specimens KW - Crack propagation KW - Constraint KW - Semi-elliptical surface flaw KW - Finite element analysis KW - Modified J-concept KW - Triaxiality PY - 1995 SN - 0-8031-2013-3 IS - STP 1244 SP - 88 EP - 99 AN - OPUS4-34990 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wieser, Günter A1 - Qiao, Linan A1 - Eberle, Arno A1 - Völzke, Holger T1 - Thermomechanical Finite-Element Analyses of Bolted Cask Lid Structures KW - Aircraft crash KW - Fire load KW - Simulation KW - Lid-seal system KW - Storage cask KW - Metallic seal KW - Leakage rate PY - 2004 SN - 1746-5095 SN - 1746-5109 SN - 0957-476X VL - 15 IS - 3-4 SP - 223 EP - 230 PB - Ramtrans Publ. CY - Ashford AN - OPUS4-14440 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bäßler, Ralph A1 - Eberle, Arno T1 - Damage investigation on the explosive destruction of a tank at a chlorine liquefaction plant N2 - This paper summarizes the investigation of a serious explosion, which shattered the chemical facility of a chlorine/alkaline plant in Northern Germany in 1981. A pressure tank made from HSB 50 S steel and used as storage of liquid residues from a chlorine liquefaction process violently ruptured and the explosion threw parts of the tank approximately 100 m through the air. The local county government ordered an investigation to determine the root cause of this incident. The main objective of the investigation was to determine whether a nitrogen overpressure or a chemical reaction of residuals inside the so-called 'Taffy' receiver caused the explosion. A fracture mechanics based analyses evaluated the conditions the material was exposed to during the damage. Metallographic and mechanical tests confirmed that the material specifications were within the values specified by the guidelines but corrosion had reduced the wall thickness considerably. Analytical calculations to determine the minimum required pressure for the rupture and to cause plastic deformation to the tank confirmed that the failure did not occur due to nitrogen overpressure and therefore, a chemical reaction must have occurred. A detailed chemical analysis confirmed that the explosive disintegration of methylnitrate, which is highly sensitive to heat and impact, and its halogenated derivatives likely caused the incident. Due to the design and operational mode of the plant, impurities could accumulate and form explosive compounds in the Taffy receivers without control. KW - Chlorine liquefaction process KW - 'Taffy' pressure tank failure KW - Explosion by chemical reaction of residues of methylnitrate KW - Fracture of HSB 50 S (StE 36) PY - 2014 DO - https://doi.org/10.1016/j.engfailanal.2014.02.007 SN - 1350-6307 SN - 1873-1961 VL - 43 IS - Special Issue 'A Tribute to Prof. A. Martens' SP - 120 EP - 132 PB - Elsevier Science Publ. CY - Oxford AN - OPUS4-30635 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -