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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Acoustic softening in metals during ultrasonic assisted deformation via CP-FEM

Amir, Muhammad and El Sayed, Tamer (2011) Acoustic softening in metals during ultrasonic assisted deformation via CP-FEM. Materials Letters, 65. pp. 356-359. ISSN 0167-577X

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Abstract

In this paper, a phenomenological crystal plasticity model is modified to account for acoustic (ultrasonic) softening effects based on the level of ultrasonic intensity supplied to single and polycrystalline metals. The material parameters are identified using the inverse modeling approach by interfacing the crystal plasticity model with an optimization tool. The proposed model is validated and verified by comparing the microstructure evolution with experimental EBSD results reported in the literature. The model is able to capture the ultrasonic softening effect and the results show that as the ultrasonic intensity increases, the plastic deformation also increases. Differences in the stress–strain response are explained based on the slip system orientation tensor (Schmidt factors) which depends upon the crystal orientation.