文章基本信息

标题：Assessment of Material Dislocation Damage by Nonlinear Ultrasound
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作者：Zaifu Zhan ; Shen Wang ; Songling Huang 等
期刊名称：MATEC Web of Conferences
电子版ISSN：2261-236X
出版年度：2020
卷号：316
页码：1-6
DOI：10.1051/matecconf/202031601001
语种：English
出版社：EDP Sciences
摘要：Under harsh environment or during service, the mechanical properties of materials or structure will deteriorate. Most of the simulations exhibit the phenomenon of nonlinearity by introducing the actual small defects, without considering dislocation. In this manuscript, subroutines are written to change the mechanical constitutive behaviour of materials. When the mechanical constitutive behaviour of the material is not linear any more, it is found that the propagation of ultrasonic wave in the material will show more obvious nonlinear phenomenon. Furthermore, the nonlinear detection coefficient is used to characterize the increase of harmonic components. This work provides a new idea for nonlinear ultrasonic testing.