【作者】 袁朝龙； 钟约先； 马庆贤； 焦玮；

【Author】 YUAN Chaolong ZHONG Yuexian MA Qingxian JIAO Wei (Department of Mechanical Engineering,Tsinghua University,Beijing 100084)

【机构】 清华大学机械工程系；

【摘要】 为了通过数值模拟研究大型锻件内部孔隙性裂纹自修复,文章借鉴裂纹扩展的G判据,建立了孔隙性裂纹自修复的能量判据,提出了孔隙性裂纹自修复驱动力,通过能量判据将孔隙性裂纹扩展和修复两种演化方式统一起来。使用能量判据很好地解释孔隙性裂纹修复过程中的现象,为进一步的数值模拟研究建立了基础。更多还原

【Abstract】 In order to study the self-healing of cavity-type crack in heavy forging by numerical modeling,energy criterion for cavity-type crack self-healing was founded refer to the G criterion for crack extension and driving force of self-healing was also proposed.The extension and self-healing of crack were associated by the energy criterion.The phenomena discovered during crack self-healing could be explained by the criterion.It founded the ground of numerical modeling research of crack self-healing in heavy forging.更多还原