Optical method of caustics applied in viscoelastic fracture analysis

doi:10.1016/j.optlaseng.2011.01.012

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	Optical method of caustics applied in viscoelastic fracture analysis
	Gao, Guiyun ; Li, Zheng ; Xu, Jie
刊名	工程光学与激光
	2011
关键词	Method of caustics Viscoelastic fracture Stress intensity factor STRESS SINGULARITIES COMPOSITES CRACK
DOI	10.1016/j.optlaseng.2011.01.012
英文摘要	The optical method of caustics is developed here to study the fracture of viscoelastic materials. By adopting a distribution of viscoelastic stress fields near the crack tip, the method of caustics is used to determine the viscoelastic fracture parameters from the caustic patterns near the crack tip. Two viscoelastic materials are studied. These are PMMA and ternary composites of HDPE/POE-g-MA/CaCO(3). The transmitted and reflective methods of caustics are performed separately to investigate viscoelastic fracture behaviors. The stress intensity factors (SIB) versus time is determined by a series of shadow spot patterns combined with viscoelastic parameters evaluated by creep tests. In order to understand the viscoelastic fracture mechanisms of HDPE/POE-g-MA/CaCO(3) composites, their fracture surfaces are observed by a Scanning Electron Microscope (SEM). The results indicate that the method of caustics can be used to characterize the fracture behaviors of viscoelastic materials and further to optimize the design of polymer composites. (C) 2011 Elsevier Ltd. All rights reserved.; Optics; SCI(E); 4; ARTICLE; 5; 632-639; 49
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/239983]
专题	工学院
推荐引用方式 GB/T 7714	Gao, Guiyun,Li, Zheng,Xu, Jie. Optical method of caustics applied in viscoelastic fracture analysis[J]. 工程光学与激光,2011.
APA	Gao, Guiyun,Li, Zheng,&Xu, Jie.(2011).Optical method of caustics applied in viscoelastic fracture analysis.工程光学与激光.
MLA	Gao, Guiyun,et al."Optical method of caustics applied in viscoelastic fracture analysis".工程光学与激光 (2011).