Evaluation of the Interfacial Properties in Polymer Matrix Composite: Experiments and Elasto-Plastic Shear-Lag Analysis

Souta Kimura; Jun Koyanagi; Takayuki Hama; Hiroyuki Kawada

doi:10.4028/www.scientific.net/KEM.340-341.167

Paper Titles

Proposal of Various Connecting Methods of Fiber Strands and Finite Element Method Analysis of Strength
p.143

Rate-Dependent Off-Axis Tensile Behavior of Cross-Ply CFRP Laminates at Elevated Temperature and Simulation Using a Viscoplasticity Model
p.149

Effects of Stacking Sequence on Notched Strengths of Cross-Ply CFRP Laminates and Analysis Using a Cohesive Zone Model
p.155

A Modified Kinematic-Hardening Viscoplasticity Model for Off-Axis Creep Behavior of Unidirectional CFRPs at High Temperature
p.161

Evaluation of the Interfacial Properties in Polymer Matrix Composite: Experiments and Elasto-Plastic Shear-Lag Analysis
p.167

Higher-Order Stress due to Self Energy of Geometrically Necessary Dislocations
p.173

Forming Limits Prediction of FCC Sheet Metal Adopting Crystal Plasticity
p.179

High Density Bands of GN Dislocations Formed by Multi Body Interaction in Compatible Type Multi Crystal Models
p.187

Dependence of Localized Deformation on Point Defect Development Caused by Intersected Cross Slip among Dislocations
p.193

HomeKey Engineering MaterialsKey Engineering Materials Vols. 340-341Evaluation of the Interfacial Properties in...

Evaluation of the Interfacial Properties in Polymer Matrix Composite: Experiments and Elasto-Plastic Shear-Lag Analysis

Abstract:

An energy-based analysis has been developed to evaluate interfacial adhesion between fiber and matrix in a single fiber composite over the years. However, the value of the energy-based parameter, e.g. an energy release rate, depends on a stress distribution predicted by a model employed. In the case of carbon fiber-reinforced plastics (CFRP), laser Raman spectroscopy (LRS) is significantly effective to validate the stress distribution predicted. The fragmentation tests with a model of carbon fiber-reinforced epoxy composite are performed, and LRS is used to detect a distribution of the fiber axial strain. An elasto-plastic shear-lag analysis methodology is employed, and a stress distribution is predicted under various approximations of s-s curve of the matrix resin and compared with the experimental results. Our recent energy-balance method, including an energy dissipation induced by plastic deformation around an interfacial debonding tip, is used to calculate an energy release rate to initiate an interfacial debonding (interfacial energy). An effect of the difference between the approximations on the value of the interfacial energy is discussed.