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

Amir Siddiq, Tamer El Sayed

Research output: Contribution to journalArticle

82 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)356-359
Number of pages4
JournalMaterials Letters
Volume65
Issue number2
DOIs
Publication statusPublished - 31 Jan 2011

Keywords

  • constitutive model
  • crystal plasticity theory
  • finite element analysis
  • polycrystalline materials
  • ultrasonic softening

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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