Modeling of the temperature-dependent ideal tensile strength of solids

doi:10.1088/0031-8949/89/8/085803

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	Modeling of the temperature-dependent ideal tensile strength of solids
	Cheng, Tianbao ; Li, Weiguo ; Fang, Daining
刊名	physica scripta
	2014
关键词	ideal tensile strength temperature-dependent critical strain principle critical failure energy density principle refractory metals single crystals ELASTIC PROPERTIES CUBIC METALS BCC METALS THERMOPHYSICAL PROPERTIES POLYCRYSTALLINE TUNGSTEN THEORETICAL STRENGTH THERMAL-EXPANSION SINGLE-CRYSTALS YOUNGS MODULUS MOLAR VOLUME
DOI	10.1088/0031-8949/89/8/085803
英文摘要	To reveal the fracture failure mechanisms of single crystals at elevated temperatures, a new temperature-dependent ideal tensile strength model for solids has been developed, based on the critical strain principle. At the same time, the uniaxial tensile strength model, based on the critical failure energy density principle for isotropic materials that was presented in the previous study, is generalized to multi-axial loading and to cubic single crystals. The relationship between the two models is discussed, and how to obtain the material properties needed in the calculations is summarized. The two well-established models are used to predict the temperature-dependent ideal tensile strength of W, Fe and Al single crystals. The predictions from the critical strain principle agree well with the predictions from the critical failure energy density principle. The theoretical values from the critical strain principle at 0 K is in reasonable agreement with the ab initio results. The study shows that the temperature dependence of the ideal tensile strength is similar to that of Young's modulus; that is, the ideal tensile strength firstly remains approximately constant and then decreases linearly with the temperature. The fracture failure for single crystals at elevated temperatures has been identified, for the first time, as a strain-controlled criterion.; Physics, Multidisciplinary; SCI(E); EI; 1; ARTICLE; wgli@cqu.edu.cn; 8; 89
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/388586]
专题	工学院
推荐引用方式 GB/T 7714	Cheng, Tianbao,Li, Weiguo,Fang, Daining. Modeling of the temperature-dependent ideal tensile strength of solids[J]. physica scripta,2014.
APA	Cheng, Tianbao,Li, Weiguo,&Fang, Daining.(2014).Modeling of the temperature-dependent ideal tensile strength of solids.physica scripta.
MLA	Cheng, Tianbao,et al."Modeling of the temperature-dependent ideal tensile strength of solids".physica scripta (2014).