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	考虑微缺陷形状的细片层状珠光体钢的损伤本构模型
	李卫国 ; 彭向和 ; Li Weiguo ; Peng Xianghe
	2010-07-19 ; 2010-07-19
关键词	珠光体钢 椭球形孔洞 损伤 本构方程 Hill自洽方法 pearlitic steel,ellipsoidal void,damage,constitutive equation,Hill's self-consistent scheme. O346.5
其他题名	Damage Constitutive Relationship Involving Void Shape Variation for Pearlitic Steel with Fine Laminar Microstructure
中文摘要	基于非经典塑性理论和连续介质损伤力学,利用在一个特殊坐标系下基于椭球形孔洞模型得到的可考虑孔洞形状变化混合强化材料的损伤演化率得到了铁素体相的损伤本构方程,通过混合物理论利用铁素体和渗碳体相各自本构关系并考虑其几何特征得到了珠光体团的损伤本构模型。进而采用Hill自洽方法,得到了珠光体材料的宏观损伤本构描述,发展了相应的数值方法与程序。讨论了孔洞形状对材料损伤的影响,并对典型珠光体双相材料BS11在非对称循环加载史下的弹塑性响应特性进行了分析,得到了与实验较为一致的结果。; Based on a nonclassical theory of plasticity and the continuum damage mechanics,a damage constitutive equation is obtained for the ferrite phase with the damage evolution law for mixed hardening materials from an ellipsoidal void model under particular coordinates,where the void shape variation is considered.The overall constitutive description for a pearlitic colony is derived from the combination of constitutive models respectively for ferrite and cementite phases and the geometric characteristics with mixture theory,and the constitutive model for the plasticity and damage description is further derived based on the Hill's self-consistent scheme.The corresponding numerical algorithm and program are developed.The elastoplastic response of the typical dualphase pearlitic steel BS11 subjected to asymmetrically cyclic loading and the effect of the change of void shape on the damage evolution are discussed.The numerical results are coincident with the experimental ones expectively.; 国家自然科学基金(10272119); 教育部“跨世纪优秀人才培养计划”基金资助
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/76037]
专题	清华大学
推荐引用方式 GB/T 7714	李卫国,彭向和,Li Weiguo,等. 考虑微缺陷形状的细片层状珠光体钢的损伤本构模型[J],2010, 2010.
APA	李卫国,彭向和,Li Weiguo,&Peng Xianghe.(2010).考虑微缺陷形状的细片层状珠光体钢的损伤本构模型..
MLA	李卫国,et al."考虑微缺陷形状的细片层状珠光体钢的损伤本构模型".(2010).

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