TY - JOUR A1 - Weber, Gert A1 - Xu, Ping T1 - Unification of Specimens and Test Procedures for Fatigue Testing of Joined Thin Sheet Metal Structures T2 - 55th International Conference Advanced Processes and Technologies in Welding and Allied Processes CY - Copenhagen, Denmark DA - 2002-06-24 PY - 2002 SN - 0043-2288 SN - 1878-6669 VL - 46 IS - III-1206-02 PB - Springer CY - Oxford AN - OPUS4-1445 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Xu, Ping A1 - Böllinghaus, Thomas T1 - Fatigue testing for spot welds - problems, solutions and new development N2 - Engineering design of spot-welded components as well as computational analyses of the local stress in the weld zone require relevant fatigue test data. Those test data, however, are dependent on the applied specimens, on the specimen restraint, on the load introduction into the weld zone as well as on the definition of the specimen failure. The discussion of the advantages and drawbacks as well as of the influence of these factors shows that a deliberate selection of specimens is necessary for different test purposes. For the comparability of the test results it is essential in addition to specify comparable test conditions, e.g., specimen fixturing, load introduction and definition of the specimen failure. On account of the variety of variants, a standardization of suitable specimens and respective test conditions hence constitutes an approach to the determination of relevant and comparable test results. T2 - SAE world congress CY - Detroit, MI, USA DA - 2003-03-03 PY - 2003 UR - http://www.sae.org/technical/papers/2003-01-0976 SN - 0-7680-1191-4 SN - 0099-5908 N1 - Serientitel: SAE-SP – Series title: SAE-SP IS - 1766 SP - 87 EP - 94 PB - Society of Automotive Engineers CY - Warrendale, Pa. AN - OPUS4-2299 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Xu, Ping A1 - Weber, Gert A1 - Böllinghaus, Thomas A1 - Krause, Hans-Joachim ED - Blom, A. F. T1 - Determination of relevant fatigue characteristics for joined thin sheet metal structures on suitable specimens with appropriate test methods T2 - 8th FATIGUE 2002 ; 8th International Fatigue Congress CY - Stockholm, Sweden DA - 2002-06-03 PY - 2002 SN - 1-901537-30-7 VL - 2 SP - 1103 EP - 1110 PB - EMAS, Engineering Materials Advisory Services CY - Cradley Heath, West Midlands AN - OPUS4-1385 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping T1 - Fatigue Testing for Spot Welds - Problems, Solutions and New Development T2 - SEA World Congress CY - Detroit, MI, USA DA - 2003-03-03 PY - 2003 AN - OPUS4-4023 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping A1 - Weber, Gert A1 - Tischlinger, Wolfgang T1 - Extended Weldability Lobes in Resistance Spot Welding T2 - 56th Annual Assembly of IIW CY - Bucharest, Romania DA - 2003-07-06 PY - 2003 AN - OPUS4-4025 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Xu, Ping T1 - Determination of fatigue crack initiation and crack propagation at spot welded joints with high-precision thermometry KW - Fatigue testing KW - Spot welds KW - Thermometry KW - Crack initiation PY - 2004 SN - 0043-2288 SN - 1878-6669 VL - 48 IS - 11-12 SP - 14 EP - 17 PB - Springer CY - Oxford AN - OPUS4-6942 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Cross, Carl Edward A1 - Ben-Hamu, G. A1 - Eliezer, D. A1 - Xu, Ping ED - Kainer, K. U. T1 - Corrosion-fatigue of AZ31 wrought Magnesium weldments T2 - 7th International conference on magnesium alloys and their applications CY - Dresden, Germany DA - 2006-09-06 KW - AZ31 Magnesium Alloy KW - Arc Weld KW - Corrosion Fatigue KW - Salt Water PY - 2008 SN - 978-3-527-31764-6 SP - 727 EP - 733 PB - Wiley-VCH AN - OPUS4-18313 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping T1 - Simple but Effective - a Mechanical Methode to Improve the Fatigue Behaviour of Spot Welded High-Strength Steels N2 - Substantial improvement in the fatigue strength of spot welded high-strength steels has been achieved with the help of a mechanical method, i. e. preloading. Fatigue tests of preloaded tensile shear specimens made from the material H280LA have revealed that their S/N-curves, compared to those of non-preloaded specimens, are not only located at elevated positions, but have flatter slope, too. Low cycle fatigue tests of the triple-spot weld tensile shear specimens examined yielded an increase in fatigue strength of around 50 %. Due to preloading, the notch zones in the spot welded area undergo plastic deformation as a result of high notch stresses. After specimen unloading, compressive stresses arise in this area involving a beneficial specimen behaviour under the load imposed in subsequent fatigue testing, thus causing delayed crack initiation in the spot weld area. T2 - The 3rd International Seminar on Advances in Resistance Welding CY - Berlin, Germany DA - 2004-11-16 PY - 2004 AN - OPUS4-4750 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping A1 - Weber, Gert A1 - Böllinghaus, Thomas A1 - Krause, Hans-Joachim T1 - Determination of Relevant Fatigue Charcteristics for Joined Thin Sheet Metal Structures on Suitable Specimens with Appropriate Test Methods T2 - The 8th International Factigue Congress "FATIGUE 2002" CY - Stockholm, Sweden DA - 2002-06-01 PY - 2002 AN - OPUS4-7170 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - McInerney, T.-J. A1 - Madigan, R.B. A1 - Xu, Ping A1 - Cross, Carl Edward ED - Stan A. David, ED - Tarasankar DebRoy, ED - John C. Lippold, ED - Herschel B. Smartt, ED - John M. Vitek, T1 - Achieving grain refinement through weld pool oscillation T2 - 7th International Conference on Trends in Welding Research CY - Pine Mountain, GA, USA DA - 2005-05-16 KW - Aluminium Alloy KW - Grain Refinement KW - Weld Pool Oscillation KW - Frequency Amplitude Range KW - Alloy 2219 PY - 2006 SN - 978-0-87170-842-7 SP - 17 EP - 22 PB - ASM International CY - Materials Park, Ohio AN - OPUS4-18040 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -