Failure Predictions for Carbon/Epoxy Tape Laminates with Wavy Plies

Author:

Makeev Andrew1,Seon Guillaume2,Lee Edward3

Affiliation:

1. School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, USA,

2. School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, USA

3. Bell Helicopter Textron, Fort Worth, TX, USA

Abstract

Accurate matrix-dominated constitutive properties can be a key to accurate failure models for polymer-matrix composites. This work shows the effect of nonlinear interlaminar shear stress-strain relations on delamination failure predictions for thick IM7/8552 carbon/epoxy tape laminates with wavy plies. Nonlinear finite element model (FEM) predictions and subsequent test correlations are presented. The interlaminar shear stress-strain relations are generated using short-beam shear tests and a digital image correlation full-field strain measurement technique. Test data for the wavy-ply coupons show that nonlinear shear stress-strain response is required for accurate failure prediction.

Publisher

SAGE Publications

Subject

Materials Chemistry,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

Reference10 articles.

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