Prediction of Elastic Constants of Carbon Fabric/Polyurethane Composites

Shun Fa Hwang; Hsuan Ting Liu

doi:10.4028/www.scientific.net/SSP.258.233

Paper Titles

Fretting High-Cycle Fatigue Assessment through a Multiaxial Critical Plane-Based Criterion in Conjunction with the Taylor’s Point Method
p.217

Cracks Loaded by Rolling Contact - Influence of Plasticity around the Crack
p.221

Mechanical Behavior of 3D Printed Stochastic Lattice Structures
p.225

On the Influence of Internal Void Size on the Fracture Stress of Constrained Solder Joints
p.229

Prediction of Elastic Constants of Carbon Fabric/Polyurethane Composites
p.233

Crack Growth Studies in a Welded Ni-Base Superalloy
p.237

Fatigue Crack Propagation in Haynes 230: A Comparison between Single and Polycrystal Crack Closure Levels
p.243

Scales of Metal Fatigue Failures and Mechanisms for Origin of Subsurface Fracture Formation
p.249

The Influence of Microstructure Heterogeneities on the Very High Cycle Fatigue Behavior of Duplex Stainless Steel
p.255

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Prediction of Elastic Constants of Carbon Fabric/Polyurethane Composites

Abstract:

The purpose of this work is to study a new composite material consisting of polyurethane (PU) resin and carbon fiber fabric. This PU resin is superior in impact, viscosity, low curing temperature, and short curing time. If this resin is combined with fiber fabric by vacuum assisted resin transfer method, the fabrication time will be short. Since it is a braided composite, it’s important to have a model to predict the elastic constants for different braid angels. To predict the elastic constants including Young’s modulus, shear modulus, and Poisson’s ratio, a finite element model is established. In this model a braided layer is treated as two uni-directional layers. Then, the elastic constants of this composite with different braid angels are estimated. After that, the composites with different braid angels are fabricated and tested to obtain the elastic constants, and the comparison with the finite element results is made. The results indicate that the agreement is very good for the Young’s modulus. For the Poisson’s ratio, the difference between the prediction and the measurement is reasonable. From the comparison, it can be concluded that the finite element model is good. Then, this model is used to predict all in-plane elastic constants for arbitrary braid angles.