Computational modeling of the plastic-damage behavior of porous MAX phase with aligned ellipsoid-like pores under uniaxial compression

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:63

Article

Cheng, Feifei¹  Kim, Sun-Myung²  Reddy, J. N.¹ 

[1] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA

[2] Texas A&M Univ, Zachry Dept Civil Engn, College Stn, TX 77843 USA

关键词: MAX phases;    Porosity;    Plasticity;    Damage;    Compressive strength;   

DOI  :  10.1016/j.ijsolstr.2015.02.046

来源: Elsevier

【 摘 要 】

The mechanical properties of porous MAX phase, namely porous Ti2AlC with aligned ellipsoid-like pores is studied in this study. Micromechanics based representative element volume (RVE) and finite element (FE) method are adopted in modeling porous Ti2AlC. A damage-plasticity coupled constitutive model considering different tensile and compressive behaviors is used in modeling the inelastic behavior of porous Ti2AlC under uniaxial compression. The effects of porosity volume fraction and pore size on elastic moduli and compressive behavior of the porous Ti2AlC systems are investigated. Numerical results show that unlike typical porous ceramic, porous Ti2AlC behaves like a quasi-brittle material under uniaxial compression, and the damage of porous Ti2AlC is mainly driven by localized tensile failure. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

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