DETECTING PLASTIC STRAIN DISTRIBUTION BY A NONLINEAR WAVE MIXING METHOD

被引：8
|
作者：
Tang, Guangxin [1 ]
Liu, Minghe [2 ]
Jacobs, Laurence J. [3 ]
Qu, Jianmin [1 ,2 ]
机构：
[1] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA
[2] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA
[3] Georgia Inst Technol, G W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
来源：
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 32A AND 32B | 2013年 / 1511卷
关键词：
Quadratic Nonlinearity; Wave Mixing; Plastic Strain Distribution; ELASTIC-WAVES; GENERATION; DAMAGE;
D O I：
10.1063/1.4789180
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A nonlinear wave mixing method is used to measure the plastic strain distribution in polycrystalline materials. A pair of collinear longitudinal and shear waves is generated. Under the phase matching condition, a resonant shear wave with a difference frequency is generated and propagates towards the shear wave transducer. The amplitude of this resonant shear wave is proportional to the acoustic nonlinearity parameter beta, which is known to be related to plastic deformation. By adjusting the two primary waves so that they mix at different locations, the distribution of beta can be obtained. This study demonstrates the feasibility of detecting plastic strain distribution in polycrystalline materials by the nonlinear wave mixing technique.
引用
收藏
页码：1204 / 1211
页数：8
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