Ratcheting-Fatigue Failure of Pressurized Elbows made of Carbon Steel
Ratcheting-Fatigue Failure of Pressurized Elbows made of Carbon Steel
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碳钢承压弯头的棘轮疲劳破坏
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Kushwaha
中科院分区：
文献类型：
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作者：
S. Gupta;S. Goyal;V. Bhasin;K. K. Vaze;A. Ghosh;H. Kushwaha
对符合ASME规范SA-333 Gr.6的碳锰钢进行了棘轮疲劳试验研究。对承受可逆循环弯曲的压力管道-弯头组件进行了试验，以评估棘轮-疲劳协同作用引起的失效机理。这些研究是评估管道抗震设计规则所必需的。研究表明，棘轮应变和非松弛平均应力对材料的低周疲劳寿命有显著影响。
Ratcheting-fatigue investigations have been carried out to understand the ratcheting-fatigue failure of carbon manganese steel (conforming to ASME specification of SA-333 Gr.6). Experiments have been conducted on pressurized pipe-elbow assembly subjected to reversible cyclic bending, to assess the failure mechanics owing to ratcheting-fatigue synergy. These studies are required to evaluate the piping seismic design rules. These investigations have shown significant influence of the ratchet strain and non-relaxing mean stress on the low cycle fatigue life of material.