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	Kagome平面格栅结构的屈服面及裂尖塑性区分析
	钱岳强 ; 邱信明 ; 张雄 ; Qian Yueqiang ; Qiu Xinming ; Zhang Xiong
	2010-05-14 ; 2010-05-14
关键词	塑性力学 断裂 Kagome 裂尖 各向异性 plastic mechanics fracture Kagome crack tip anisotropic O344
其他题名	ANALYSIS OF YIELD SURFACE AND CRACK TIP PLASTIC ZONE OF KAGOME LATTICE STRUCTURE
中文摘要	分析了Kagome格栅的等效刚度和屈服面.其屈服面奇异,由4段直线围成.利用该屈服面,估算了Kagome具有Ⅰ型、Ⅱ型半无限大裂纹的裂尖塑性区,有限元计算验证了解析预测的准确性.与奇异屈服面相比,由Mises光滑屈服面给出的塑性区误差较大.因此只有弹性情况,可以将Kagome等效为各向同性;若材料塑性,或应力场奇异性较强,Kagome的强度依赖于主应力方向,不能用各向同性模型来描述.; Effective stiffness and yield surface of Kagome lattice structure are investigated in the paper.The shape function of singular yield surface is a convex domain in the plane enclosed within four straight lines.The plastic zone of crack tips of modeⅠand modeⅡcracks in the infinite half plane are estimated with the singular yield surface and validated with finite element simulation,which are more precise than those with Mises smooth yield surface.Thus Kagome could be simplified as isotropic continuum only in elastic deformation;meanwhile, in the case of material yielding or the strong singular stress field,the strength of Kagome lattice depends on the direction of principal stress.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/33534]
专题	清华大学
推荐引用方式 GB/T 7714	钱岳强,邱信明,张雄,等. Kagome平面格栅结构的屈服面及裂尖塑性区分析[J],2010, 2010.
APA	钱岳强,邱信明,张雄,Qian Yueqiang,Qiu Xinming,&Zhang Xiong.(2010).Kagome平面格栅结构的屈服面及裂尖塑性区分析..
MLA	钱岳强,et al."Kagome平面格栅结构的屈服面及裂尖塑性区分析".(2010).

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