| 热辐射应力图像分析确定应力强度因子K_I 和裂纹尖端塑性区 |
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| 引用本文： | 顾绍德,曹正元,袁旬华.热辐射应力图像分析确定应力强度因子K_I 和裂纹尖端塑性区[J].同济大学学报(自然科学版),1993(4). |
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| 作者姓名： | 顾绍德 曹正元 袁旬华 |
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| 作者单位： | 同济大学工程力学系，同济大学工程力学系，同济大学工程力学系 |
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| 摘 要： | 本文借助于热辐射应力图像分析技术对裂纹尖端附近的应力场进行分析测定。记录了铝质紧凑拉伸试件的热辐射应力图像,给出裂纹尖端前沿的温度变化曲线。根据热弹效应和线弹性断裂力学理论,通过解析建立用热辐射应力图像分析技术确定Ⅰ型裂纹应力强度因子的基本方程。在此基础上,用热辐射应力图像分析技术实验确定Ⅰ型裂纹应力强度因子和裂尖塑性区。
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| 关 键 词： | 实验应力分析 热辐射应力图像分析 热弹性 应力强度因子 塑性区 |
Determing Stress Intensity Factor K_1and Plastic Region near Crack Tip by Means of SPATE |
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| Gu Shaode Cao Zhengguan YuanXunhua.Determing Stress Intensity Factor K_1and Plastic Region near Crack Tip by Means of SPATE[J].Journal of Tongji University(Natural Science),1993(4). |
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| Authors: | Gu Shaode Cao Zhengguan YuanXunhua |
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| Institution: | Department of Engineering Mechanics |
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| Abstract: | In this paper, the stress field around crack tip in compact tension specimens made of aluminum alloy has been measured. The thermal emission stress patterns and curves of variances in temperature in front of the crack tip are obtained. From thermoelastic effect and linear elastic fracture mechanics, the fundamental equations applied to determing SIF K using SPATE are established herein. Based on this analysis, it has been shown experimentally that the SIF K_I and plastic region near crack tip can be determined by SPATE. |
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| Keywords: | Experimental stress analysis SPATE Thermoelasticity SIF Plastic region |
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