An investigation of composite failure analyses and damage evolution in finite element models

Ann M Frappier, Purdue University

Abstract

This paper presents a composite conical structure used commonly in flight-qualification testing. This structure?s overall load-displacement behavioral response is characterized. Mixed-mode multidelamination in a layered composite specimen is considered in Abaqus/Explicit through both the Virtual Crack Closure Technique and Cohesive Elements. The Virtual Crack Closure Technique and Cohesive Elements are compared against experimental test results presented in literature. Further, a thorough comparison in which the effects of failure criteria type, through-thickness mesh density, and finite element type on the progressive failure response of this composite assembly is discussed. Lastly, Abaqus/Standard and Helius PFA are compared in order to gain confidence into which analytical model?s failure theories best predicts the different scales of failure, both local/microscale and global/macroscale.

Degree

M.S.E.

Advisors

Vikas Tomar, Purdue University.

Subject Area

Mechanical engineering

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