Debonding Analyses in Anisotropic Materials with Strain-Gradient Effects

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Abstract

A unit cell approach is adopted to numerically analyze the effect of plastic anisotropy on damage evolution in a microreinforced composite. The matrix material exhibit size effects and a visco-plastic anisotropic strain gradient plasticity model accounting for such size effects is adopted. A conventional cohesive law is extended such that both the average as well as the jump in plastic strain across the fiber-matrix interface are accounted for. Results are shown for both conventional isotropic and anisotropic materials as well as for higher order isotropic and anisotropic materials with and without debonding. Generally, the strain gradient enhanced material exhibits higher load carry capacity compared to the corresponding conventional material. A sudden stress drop occurs in the macroscopic stress-strain response curve due to fiber-matrix debonding and the results show that a change in yield stress, which is caused by plastic anisotropy, affects the overall composite failure strain.
Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress of Theoretical and Applied Mechanics
Number of pages2
Publication date2012
Publication statusPublished - 2012
EventICTAM 2012: 23rd International Congress of Theorectical and Applied Mechanics - Beijing, China
Duration: 19 Aug 201224 Oct 2012

Conference

ConferenceICTAM 2012
CountryChina
CityBeijing
Period19/08/201224/10/2012

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