基于三维数字图像相关法的锯齿屈服时空特性研究

来源 :第十四届全国实验力学学术会议 | 被引量 : 0次 | 上传用户：dingbinqi

【摘要】

：

　　在特定的温度、应变率范围内，许多合金材料在塑性变形阶段中会出现反复的锯齿形塑性失稳现象，即Portevin-Le Chatelier(PLC)效应。时域上常表现为应力-应变曲线上的锯齿状

【作者】

：

蔡玉龙符师桦杨素丽王玉辉张青川

【机构】

：

中国科学技术大学近代力学系中国科学院材料力学行为和设计重点实验室,合肥230027

【出处】

：

第十四届全国实验力学学术会议

【发表日期】

：

2015年7期

【关键词】

：

5456铝合金三维数字图像相关锯齿屈服

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论文部分内容阅读

　　在特定的温度、应变率范围内，许多合金材料在塑性变形阶段中会出现反复的锯齿形塑性失稳现象，即Portevin-Le Chatelier(PLC)效应。时域上常表现为应力-应变曲线上的锯齿状的反复屈服，或局部区域的应变-时间曲线上的阶梯状屈服平台；而在空域其表现为变形局域化，即变形集中于试件局部区域，通常成带状，称PLC 带。

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基于三维数字图像相关法的锯齿屈服时空特性研究

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