Test to Determine Margin-to-Failure for Hy-100 Steel with Undermatched Welds

Arpin, K. R. ; Trimble, T. F.

Lockheed Martin

关键词: Welding;    Hy-100 Steel;    36 Materials Science;    Dynamic Loads;    Yield Strength Margin-To-Failure Test;   

DOI  :  10.2172/815198
RP-ID  :  LM-03K013
RP-ID  :  AC12-00SN39357
RP-ID  :  815198

美国|英语

来源: UNT Digital Library

【 摘 要 】

This test program was undertaken to determine the flaw tolerance and to quantify the strength margin-to-failure of high yield strength steel fillet welded specimens. The tests demonstrate adequate margin-to-failure for HY-100 specimens fabricated with matched welding systems. In the use of high yield (HY) steel materials in designs required to accommodate rapidly applied dynamic loads, the concern was raised where the possibility of decreased flaw tolerance and premature failure by unstable ductile tearing could limit their use. Tests were developed and conducted to demonstrate adequate margin-to-failure in HY-100 fillet and partial penetration welded structures. In addition, inelastic analytical predictions were performed to assess the accuracy of such predictive tools compared to actual test data. Results showed that adequate margin-to-failure exists when using matched welding systems.