TY - JOUR
T1 - Acoustic nonlinearity parameter due to microplasticity
AU - Kim, J. Y.
AU - Qu, Jianmin
AU - Jacobs, L. J.
AU - Littles, J. W.
AU - Savage, M. F.
PY - 2006/3
Y1 - 2006/3
N2 - Acoustic nonlinearity (which is quantified in terms of an absolute material parameter, the acoustic nonlinearity parameter, β) can be caused by several sources, one of which is the elastic-plastic deformation of the material. This paper develops a model to quantify the acoustic nonlinearity parameter due to elastic-plastic deformation. This new model is applicable to general anisotropic elastic-plastic materials with existing microplasticity strains due to either monotonic or cyclic loading. As an example, the developed model is applied to calculate the acoustic nonlinearity parameter of a single crystal copper specimen subjected to cyclic fatigue loading. It is found that the acoustic nonlinearity parameter of this specimen increases monotonically with increasing fatigue cycles.
AB - Acoustic nonlinearity (which is quantified in terms of an absolute material parameter, the acoustic nonlinearity parameter, β) can be caused by several sources, one of which is the elastic-plastic deformation of the material. This paper develops a model to quantify the acoustic nonlinearity parameter due to elastic-plastic deformation. This new model is applicable to general anisotropic elastic-plastic materials with existing microplasticity strains due to either monotonic or cyclic loading. As an example, the developed model is applied to calculate the acoustic nonlinearity parameter of a single crystal copper specimen subjected to cyclic fatigue loading. It is found that the acoustic nonlinearity parameter of this specimen increases monotonically with increasing fatigue cycles.
KW - Acoustic nonlinearity
KW - Dislocations
KW - Nonlinear ultrasonic measurement
KW - Plasticity
KW - Single crystal plasticity
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U2 - 10.1007/s10921-006-0004-7
DO - 10.1007/s10921-006-0004-7
M3 - Article
AN - SCOPUS:33746623395
SN - 0195-9298
VL - 25
SP - 28
EP - 36
JO - Journal of Nondestructive Evaluation
JF - Journal of Nondestructive Evaluation
IS - 1
ER -