Residual Stress Analysis of an Orthotropic Composite Cylinder under Thermal Loading and Unloading

Somayeh Zarandi,Hsiang-Wei Lai,Yun-Che Wang,Sergey Aizikovich

doi:10.3390/sym11030320

Somayeh Zarandi, Hsiang-Wei Lai + Show 2 more

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https://doi.org/10.3390/sym11030320

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Journal: Symmetry	Publication Date: Mar 4, 2019
Citations: 1	License type: CC BY 4.0

Affiliation: National Cheng Kung University

Abstract

Elastoplastic analysis of a composite cylinder, consisting of an isotropic elastic inclusion surrounded by orthotropic matrix, is conducted via numerical parametric studies for examining its residual stress under thermal cycles. The matrix is assumed to be elastically and plastically orthotropic, and all of its material properties are temperature-dependent (TD). The Hill’s anisotropic plasticity material model is adopted. The interface between the inclusion and matrix is perfectly bonded, and the outer boundary of the cylinder is fully constrained. A quasi-static, uniform temperature field is applied to the cylinder, which is analyzed under the plane-strain assumption. The mechanical responses of the composite cylinder are strongly affected by the material symmetry and temperature-dependent material properties. When the temperature-independent material properties are assumed, larger internal stresses at the loading phase are predicted. Furthermore, considering only yield stress being temperature dependent may be insufficient since other TD material parameters may also affect the stress distributions. In addition, plastic orthotropy inducing preferential yielding along certain directions leads to complex residual stress distributions when material properties are temperature-dependent.

Highlights

Temperature effects on the plastic deformation have significant industrial and academic interests [1,2]
Through the basic research on the parametric analysis, it is demonstrated that the purpose of this study is to examine the residual stress in the orthotropic cylinder under thermal loading with the consideration of temperature dependent material properties
Our parametric studies demonstrate that material symmetry plays an important role in the residual stress distribution in the composite cylinder under thermal excitation

Summary

Introduction

Temperature effects on the plastic deformation have significant industrial and academic interests [1,2]. Many studies in the literature make assumptions that the material properties are isotropic and temperature-independent (TI). Aluminum composite discs under thermal loading have been studied without using temperature-dependent (TD) material properties [3,4]. Considerations of elastic and plastic anisotropy are important when the deformation of textured metals or single crystals under thermal loading are in question [5]. Anisotropic plasticity theory have been applied in many studies to understand directional dependent yielding phenomena. Yoon et al conducted research on the calibration of parameters used in anisotropic yield criterion from experimental tests in strongly textured aluminum sheets [9]. Orthotropic plastic deformation in fiber-reinforced composite disc under spinning has been analyzed [11]

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