论侧向应力与疲劳裂纹扩展

IMECH-IR > 力学所知识产出(1956-2008)

	论侧向应力与疲劳裂纹扩展
	高桦; Miller K.J.
Source Publication	固体力学学报
	1985
Issue	2 Pages:151-159
ISSN	0254-7805
Abstract	本文通过对Ⅰ型平裂纹及复合型斜裂纹的疲劳试验说明:虽然平行于裂纹面的正应力(侧向应力)对应力强度因子不起作用,但是对裂纹顶端的塑性变形,从而对疲劳裂纹扩展速率却有明显的影响.相应于同样的应力强度因子幅值,当双轴载荷比λ=1时,侧向应力为零,裂纹扩展最慢;随着λ值减小,裂纹扩展速率增大.因此,在估算疲劳寿命时,如果只考虑应力强度因子幅值的作用,而忽略实验加载条件和实际加载条件下侧向应力差别的影响,必然会带来较大的误差,甚至是不安全的.
Keyword	侧向应力疲劳裂纹扩展速率应力强度因子幅加载条件疲劳寿命双轴载荷塑性变形斜裂纹塑性区尺寸
Language	中文
Document Type	期刊论文
Identifier	http://dspace.imech.ac.cn/handle/311007/37282
Collection	力学所知识产出(1956-2008)
Corresponding Author	高桦
Recommended Citation GB/T 7714	高桦,Miller K.J.. 论侧向应力与疲劳裂纹扩展[J]. 固体力学学报,1985,2,:151-159.
APA	高桦,&Miller K.J..(1985).论侧向应力与疲劳裂纹扩展.固体力学学报(2),151-159.
MLA	高桦,et al."论侧向应力与疲劳裂纹扩展".固体力学学报 .2(1985):151-159.

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