In-plane and Out-of-plane Fracture Toughness of Physically Aged Polyesters as Assessed by the Essential Work of Fracture (EWF) Method

被引：0
|
作者：
T. Bárány
F. Ronkay
J. Karger-kocsis
T. Czigány
机构：
[1] Budapest University of Technology and Economics,Department of Polymer Engineering, Faculty of Mechanical Engineering
[2] Institut für Verbundwerkstoffe GmbH,undefined
来源：
International Journal of Fracture | 2005年 / 135卷
关键词：
Amorphous copolyester; essential work of fracture; fracture toughness; in-plane; out-of-plane; physical aging;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The in-plane (mode I) and out-of-plane (mode III) fracture behavior of amorphous (co)polyester sheets are studied as a function of physical aging using the essential work of fracture (EWF) concept. Physical aging was followed by measuring the yield stress and enthalpy relaxation of the (co)polyesters. The specific essential work of fracture term did not reflect the physical aging either in mode I or III loading. On the other hand, the corresponding values were closely matched indicating the mode III type loading turns into mode I for thin films. Aging was best manifested in the mode I – related EWF parameters, viz. specific yielding-related essential work and non-essential necking/tearing related work.
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页码：251 / 265
页数：14
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