摘要
介绍在线弹性断裂力学基础上单奇异性V形切口脆性断裂准则研究的进展。把复合型V形切口脆性断裂准则分为应力参数型和能量参数型,并重点综述这两类准则的研究现状、适用性和局限性,讨论了特征距离的确定,展望了V形切口断裂准则将来可能的研究方向,指出Ⅱ型成分占主导的复合型V形问题,断裂机制和准则,在理论与实验上还需进一步研究。
Based on the linear elasticity fracture mechanics, the progress of brittle fracture criteria of single singular V-notches was introduced. Brittle fracture criteria of planar mixed V-notches were grouped into stress- parameter and energy-parameter modes. Recent progress, applicabilities and limitations of both criteria were mainly summarized, and the determination of characteristic distance was discussed. At last, the future possi- ble fields of V-notch fracture criteria were prospected and it is pointed out that fracture principles and criteria of mixed V-notches,in which type Ⅱ is the major one, need further theoretical and experimental research.
出处
《上海工程技术大学学报》
CAS
2008年第3期258-264,共7页
Journal of Shanghai University of Engineering Science
基金
国家自然科学基金资助项目(10602023)
上海市教委科研创新项目(08YZ119)
上海市高校选拔培养优秀青年教师科研专项基金资助项目(05XPYQ32)
关键词
V形切口
脆断准则
切口应力强度因子
V-notch
brittle fracture criterion
notch stress intensity factor
