Fracture behavior of a brittle coating on a strained ductile substrate

被引：2
|
作者：
Yang, Banquan [1 ,2 ,3 ]
Chen, Guangnan [1 ]
Zhang, Kun [1 ]
Luo, Gengxing [1 ]
Xiao, Jinghua [1 ]
机构：
[1] Institute of Mechanics, Chinese Acad. of Sci., Beijing 100190, China
[2] Department of Mechanical Engineering, Academy of Armored Forces of PLA, Beijing 100072, China
[3] Graduate School, Chinese Acad. of Sci., Beijing 100190, China
来源：
Jixie Gongcheng Xuebao/Chinese Journal of Mechanical Engineering | 2008年 / 44卷 / 05期
关键词：
Carbon steel - Chromium - Coatings - Cracks - Shear stress - Tensile strain - Tensile stress;
D O I：
10.3901/JME.2008.05.057
中图分类号：
学科分类号：
摘要：
An elastic-plastic interface layer between a brittle coating and a ductile substrate is presented to investigate the fracture behavior of the brittle coating on the ductile substrate under the tensile load. Using a modified shear-lag model, the analytical solutions for the distribution laws of the tensile stress developed in the coating, the shear stress developed along the interface and the relationship between the crack density of the brittle coating and the applied strain of the substrate can be obtained. These analytical results are applied to investigate the fracture behavior of a hard and brittle chromium coating on a normal medium carbon steel substrate. The experiment results show that the average saturated crack density of the brittle chromium coating has a good agreement with that predicted by the solution presented .
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页码：57 / 61
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