TY - CONF A1 - Erhard, Anton A1 - Wüstenberg, Hermann A1 - Schenk, Gottfried A1 - Möhrle, Walter T1 - Calculation and construction of phased array-UT probes T2 - Japanese-German joint seminar on structural strength and NDE problems in nuclear engineering T2 - 3rd Japanese-German joint seminar on structural strength and NDE problems in nuclear engineering CY - Stuttgart, Germany DA - 1985-08-29 PY - 1985 SP - 1 EP - 22 AN - OPUS4-34210 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Mc Hugh, Jarlath A1 - Döring, Joachim A1 - Stark, Wolfgang A1 - Erhard, Anton T1 - Characterisation of epoxy materials used in the development of ultrasound arrays T2 - 16th World Conference on Nondestructive Testing T2 - 16th World Conference on Nondestructive Testing CY - Montreal, Canada DA - 2004-08-30 PY - 2004 UR - http://www.ndt.net/article/wcndt2004/pdf/materials_characterization/616_mchugh.pdf SP - 8 pages PB - International Committee for Non-Destructive Testing CY - Montreal AN - OPUS4-5215 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Boehm, Rainer A1 - Tessaro, Ute A1 - Wüstenberg, Hermann T1 - Characterization and sizing of defects in the cladded area using ultrasonic methods T2 - 3rd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components N2 - With the increasing of the storage capability of digitised data and the development of advanced ultrasonic equipment a characterisation of detected defects is possible without new measurements. If the A-scan is stored in a video form (rectified A-scan) or in a high frequency form evaluation techniques like SAFT or echotomography are applicable with advantage. Therefore in some of the cases an estimation of the defect size is reached by the evaluation of the ultrasonic data collected with conventional detection techniques. This is an advantage in relation to the past, because the application of a separate analysis technique is mostly not necessary, therefore time and money is saved. In the present contribution experimental results received in the laboratory are presented. The application of the TOFD approach for defect detection and sizing of crack like defect in heavy components is demonstrated whereas the probes are coupled on the carbon steel surface as well as on the cladded surface. An important point would be the influences of the anisotropic cladding material in relation to the defect sizing using the TOFD technique. These results will be compared with those received with TR longitudinal wave probes and with shear wave probes. T2 - 3rd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components CY - Seville, Spain DA - 2001-11-14 PY - 2001 UR - http://www.ndt.net/abstract/ndesi01/data/98.htm SP - 543 EP - 550 CY - Seville AN - OPUS4-2885 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Boehm, Rainer A1 - Tessaro, Ute A1 - Wüstenberg, Hermann T1 - Characterization and sizing of defects in the cladding area using ultrasonic methods T2 - 3rd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components T2 - 3rd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components CY - Seville, Spain DA - 2001-11-14 PY - 2002 CY - Seville AN - OPUS4-1748 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton A1 - Fuchs, H. A1 - Möhrle, Walter A1 - Matschol, P.I. T1 - Characterization of sound field parameters of ultrasonic probes using a computer-controlled measurement and data acquisition system JF - NDT international PY - 1985 SN - 0308-9126 VL - 18 IS - 6 SP - 359 EP - 362 PB - Elsevier CY - Amsterdam AN - OPUS4-18760 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Dugan, S. A1 - Schuler, X. ED - Bièth, M. T1 - Comparison of pre- and in-service inspection techniques in Belgium and Germany against the backdrop of ultrasonic indications found at the reactor pressure vessel of doel-3 T2 - 10th International conference on NDE in relation of structural integrity for nuclear and pressurized components (Proceedings) T2 - 10th International conference on NDE in relation of structural integrity for nuclear and pressurized components CY - Cannes, France DA - 2013-10-01 PY - 2014 SN - 978-92-79-36759-5 SN - 978-92-79-36758-8 SN - 1018-5593 SN - 1831-9424 SP - 726 EP - 734 AN - OPUS4-31428 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Iancu, O.T. A1 - Erhard, Anton A1 - Otremba, Frank A1 - Sklorz, Christian T1 - Consistency between analytical and finite element predictions for safety of cylindrical pressure vessels at higher temperatures JF - Materials Testing N2 - Die Vorhersage der Beanspruchung bei plastischem Versagen von zylindrischen Druckbehältern wird häufig mittels Finite Elemente Berechnungen durchgeführt. Die Berechnung der zulässigen Beanspruchung erfordert ein elastisch-plastisches Werkstoffmodell und die Berücksichtigung von nichtlinearen geometrischen Effekten. Das plastische Versagen verursacht eine gesamte Strukturinstabilität und kann nicht direkt aus der Finite Elemente Analyse bestimmt werden. In dem vorliegenden Beitrag wird die Beanspruchung für plastisches Versagen eines zylindrischen Druckbehälters mittels eines analytischen Verfahrens basierend auf einem linear elastischen ideal-plastischen Materialmodell bestimmt. Wenn Plastizität auftritt, wird zum einen der Werkstoff als inkompressibel und zum anderen der Tensor der plastischen Dehnungen als parallel zum Spannungsabweichungstensor angenommen. In diesem Fall kann die Spannungs-Dehnungs-Beziehung von Henkel angewendet werden, um den Druck zu berechnen, bei dem plastisches Fließen und Versagen eintritt. Die analytischen Ergebnisse werden von den Finite Elemente Berechnungen vollkommen bestätigt. KW - Materials testing KW - FEM KW - Plastic instability KW - Limit load analysis KW - Pressure vessel KW - Analytical solution PY - 2014 SN - 0025-5300 VL - 56 IS - 4 SP - 274 EP - 278 PB - Hanser CY - München AN - OPUS4-30722 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton A1 - Völzke, Holger A1 - Noack, Volker A1 - Weber, Wolfgang A1 - Wolff, Dietmar A1 - Rittscher, D. A1 - Schmidt, H. T1 - Construction of long term interim storage facility for nuclear reactor compartments of submarines: German support for utilisation of nuclear submarines in Russia JF - Packaging, transport, storage & security of radioactive materials (RAMTRANS) KW - Interim storage facility KW - Nuclear reactor compartments of submarines KW - Building of the storage facility KW - Transportation of heavy compartments PY - 2008 SN - 1746-5095 SN - 1746-5109 SN - 0957-476X VL - 19 IS - 2 SP - 117 EP - 121 PB - Ramtrans Publ. CY - Ashford AN - OPUS4-17708 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wüstenberg, Hermann A1 - Haufe, U. A1 - Erhard, Anton T1 - Contribution to the ultrasonic detection and sizing of inner wall surface breaking cracks in pipes JF - Materials evaluation PY - 1984 SN - 0025-5327 VL - 42 SP - 1142 EP - 1149 PB - Society for Nondestructive Testing CY - Columbus, Ohio AN - OPUS4-18753 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton A1 - Schulz, Eduard A1 - Brekow, Gerhard A1 - Wüstenberg, Hermann A1 - Kreier, P. T1 - Critical Assessments of the TOFD Approach for Ultrasonic Weld Inspection JF - Technical paper / Society of manufacturing engineers N2 - Weld inspection using ultrasonic pulse-echo techniques needs high skilled operators especially if geometrical indications must be taken into consideration. A clear separation between geometrical indications and defects like cracks must be guaranteed. This requirement needs sensitive techniques like the 45(deg) shear wave technique using the mirror effect. Since more than twenty years the Time Of Flight Diffraction technique (TOFD) is still under discussion for defect sizing. But on the other hand the potential of the TOFD technique for defect detection is described in technical papers of manufacturers. The main task of examinations carried out at BAM was the comparison about the detectability of surface breaking cracks between the common methods and the TOFD approach. T2 - 7th European Conference on Non-Destructive Testing (ECNDT) CY - Copenhagen, Denmark DA - 1998-05-26 KW - Time of flight diffraction KW - TOFD KW - Ultrasonic weld PY - 2001 SP - AD 1 EP - 199 PB - Society of Manufacturing Engineers CY - Dearborn, Mich. AN - OPUS4-1105 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -