Analysis of Non-Linear Relationship between Specific Work of Fracture and Ligament of Polymeric Materials Using Modified EWF Model

Kai Duan; Xiao Zhi Hu

doi:10.4028/www.scientific.net/KEM.312.65

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 312Analysis of Non-Linear Relationship between...

Analysis of Non-Linear Relationship between Specific Work of Fracture and Ligament of Polymeric Materials Using Modified EWF Model

Abstract:

This paper explores the ligament-dependent behaviour of specific work of fracture of polymeric materials using a recently-developed modified EWF model. It is demonstrated that the non-linear relationship between specific work of fracture (wf) and ligament length (l) is a result of specimen boundary influence on the evolution of plastic zone. A transition ligament (l*) is defined, below which, the height of under-developed plastic zone is equal to the ligament length, and as a result, a linear wf-l relation will be observed. The plastic zone will saturate at the transition ligament, and its height will no longer increase when l > l*. This will result in a non-linear wf-l relation. Experimental wf-l data available in the literature are analysed using the modified EWF model and very good agreements are achieved.

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Periodical:

Key Engineering Materials (Volume 312)

Pages:

65-70

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.312.65

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Online since:

June 2006

Authors:

Kai Duan, Xiao Zhi Hu

Keywords:

Boundary Effect, Essential Work of Fracture (EWF), Ligament, Polymer, Specific Work of Fracture

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