High rate test method for fiber-matrix interface characterization

2016 ◽  
Vol 52 ◽  
pp. 174-183 ◽  
Author(s):  
Sandeep Tamrakar ◽  
Bazle Z. (Gama) Haque ◽  
John W. Gillespie
Keyword(s):  
Test Method ◽  
High Rate ◽  
Matrix Interface ◽  
Interface Characterization ◽  
Rate Test ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

Numerical Test Method for Random Chopped Fiber Composites

2010 ◽  
Author(s):  
Yi Pan ◽  
Assimina A. Pelegri
Keyword(s):  
Composite Material ◽  
Cohesive Zone Model ◽  
Hydrostatic Stress ◽  
Numerical Test ◽  
Test Method ◽  
Zone Model ◽  
Matrix Interface ◽  
Material Constants ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

A two-scale approach for numerical determination of composite material constants using a finite element model is developed. A representative volume element is numerically generated using a modified sequential adsorption algorithm. To determine the strength of the composite material, progressive material degradation models are adopted for the matrix, fiber and the fiber/matrix interface. The epoxy resin is modeled with a modified von Mises criterion in which the effect of hydrostatic stress on yield is accounted for. The resin’s elastic constants degrade with increasing loading application. The glass fiber is modeled as an isotropic material whose failure is governed by the maximum strain criterion. A traction-separation type cohesive zone model is applied at the fiber/matrix interface. Validation of the presented model is achieved by comparing numerical simulations with experimental data. The effective material constants that have been homogenized by the numerical test approach can be applied for future structural analysis.

scholarly journals Rationalizing the impact of aging on fiber–matrix interface and stability of cement-based composites submitted to carbonation at early ages

2016 ◽  
Vol 51 (17) ◽  
pp. 7929-7943 ◽  
Author(s):  
G. H. D. Tonoli ◽  
V. D. Pizzol ◽  
G. Urrea ◽  
S. F. Santos ◽  
L. M. Mendes ◽  
...  
Keyword(s):  
Matrix Interface ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
The Impact

Damping in Unidirectional and Cross-Ply Ceramic Matrix Composites With Matrix Cracks

2001 ◽  
Author(s):  
Victor Birman ◽  
Larry W. Byrd
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Interfacial Friction ◽  
Matrix Composites ◽  
Matrix Interface ◽  
Unidirectional Composites ◽  
Matrix Cracks ◽  
Dissipation Of Energy ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

Abstract The paper elucidates the methods of estimating damping in ceramic matrix composites (CMC) with matrix cracks. Unidirectional composites with bridging matrix cracks and cross-ply laminates with tunneling cracks in transverse layers and bridging cracks in longitudinal layers are considered. It is shown that bridging matrix cracks may dramatically increase damping in unidirectional CMC due to a dissipation of energy along damaged sections of the fiber-matrix interface (interfacial friction). Such friction is absent in the case of tunneling cracks in transverse layers of cross-ply laminates where the changes in damping due to a degradation of the stiffness remain small. However, damping in cross-ply laminates abruptly increases if bridging cracks appear in the longitudinal layers.

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