摘要
采用文献［１］中提出的弹性粘塑性模型，分析了Ⅲ型动态扩展裂纹尖端的应力应变场文中给出了适当的位移模式，推导了渐近方程并求得了数值解分析和计算表明，当粘性较小时，裂纹尖端场具有对数奇异性；而当粘性较大时，裂尖场具有幂函数奇异性对于临界粘性情况。
The elastoviscoplastic model proposed by is used in this paper to analyse the stress and strain field surrounding a propagating cracktip of mode Ⅲ. The proper displacement pattern is given, the asymptotic equations are derived, and the numerical results are obtained. The analysis and calculation show that for lower viscosity the cracktip field possesses logarithmic singularity, and for higher viscosity it possesses powerlaw singularity. In critical case, the two kinds of singularity are consistent with each other. The result of this paper reveals the important role of viscosity for cracktip field.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
1996年第3期120-126,共7页
Journal of Harbin Engineering University
基金
黑龙江省自然科学基金
