| 声弹性方法测量金属材料的塑性损伤 |
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| 引用本文： | 廖财楚,吴克成.声弹性方法测量金属材料的塑性损伤[J].实验力学,1997,12(3):364-369. |
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| 作者姓名： | 廖财楚 吴克成 |
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| 作者单位： | 东风汽车公司技术中心，华中理工大学力学系 |
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| 摘 要： | 本文提出一个利用非线性参数研究材料损伤的声弹性方法．在该方法中定义了一个由二阶和三阶弹性常数所组合的损伤变量．以２０＃钢为例，采用横波声弹性方法测量金属材料的塑性损伤．同时用声速法作了损伤测量．对比两种方法的实验结果表明，新方法是对金属材料塑性损伤测量的有效技术．
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| 关 键 词： | 声弹性，超声，材料损伤 |
Plastic Damage Measurement for Metallic Material by Acoustoelastic Method |
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| Abstract: | An acoustoelastic method for measuring the degree of damage in materials is proposed.In the method a damage variable which is the combination of the second and third order elastic constants of the material is defined, and the variation of this parameter caused by material damage is detected by the relative change of flying time for the transverse acoustic waves in the specimen. An experiment for measuring the plastic damage in a 20 # steel specimen is performed and compared with the experiment on ultrasonic velocity method. The effectiveness of the new method is justified. |
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| Keywords: | acoustoelasticity ultrasonics material damage |
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