摘要
讨论了带有裂纹的金属构件通入脉冲电流瞬间，裂纹尖端附近电流、温度和热应力的耦合关系。分析采用了有限元法，通过热－电耦合（焦耳热问题）和热－机械耦合两个过程来实现。通过数值解析模型，模拟了脉冲放电瞬间的电流－温度－热应力的演变过程，求解了脉冲放电瞬间裂纹前缘的热压应力场。温度场、应力场数值计算结果同理论分析有很好的吻合。
：The couple of current, temperature and stress are studied in metal thin plate with crack at the moment while pulse current is switched on. In analysis, the finite methods are used. The analysis process is composed of the thermal-electrical coupled and thermal-mechanical coupled. The evolutive process of current-temperature-stress is simulated in numerical analysis, the thermal stress around crack is solved at the moment while the pulse current is switched on. The temperature field and stress field results of numerical simulation correspond to the results of theoretical analysis.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2002年第3期90-93,共4页
Journal of Mechanical Engineering
基金
国家自然科学基金(19772046)
河北省自然科学基金资助项目 (599255)。
