Effects of Manufacturing-Induced Voids on Local Failure in Polymer-Based Composites

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
K. A. Chowdhury ◽  
R. Talreja ◽  
A. A. Benzerga
Keyword(s):  
Strain Rate ◽  
Polymer Matrix Composites ◽  
Computational Study ◽  
Isotropic Hardening ◽  
Large Strains ◽  
Temperature Sensitive ◽  
Matrix Composites ◽  
Unit Cells ◽  
Craze Initiation

This paper presents results of a computational study focused on examining the role of manufacturing-induced voids in the initiation and growth of damage at the microstructural level in polymer matrix composites loaded in tension normal to fibers. The polymer deformation is described by an improved macromolecular constitutive model accounting for strain-rate-, pressure-, and temperature-sensitive yielding, isotropic hardening before peak yield, intrinsic postyield softening, and rapid anisotropic hardening at large strains. A new craze model that accounts for craze initiation, growth, and breakdown mechanisms is employed. An energy-based criterion is used for cavitation induced cracking that can lead to fiber/matrix debonding. The role of voids is clarified by conducting a comparative study of unit cells with and without voids. The effects of strain rate and temperature are investigated by a parametric study. The overall composite stress-strain response is also depicted to indicate manifestation of microlevel failure on macroscopic behavior.

Low Cycle Fatigue of Unidirectional Glass/Epoxy Composites

1999 ◽  
Author(s):  
V. M. Harik ◽  
J. R. Klinger ◽  
B. K. Fink ◽  
T. A. Bogetti ◽  
A. Paesano ◽  
...  
Keyword(s):  
Polymer Matrix Composites ◽  
Low Cycle Fatigue ◽  
Glass Fibers ◽  
Fatigue Loading ◽  
Large Strains ◽  
Matrix Composites ◽  
Cycle Fatigue ◽  
Degradation Rates ◽  
Characteristics Analysis ◽  
Stress Ratios

Abstract Low cycle fatigue (LCF) behavior of unidirectional polymer matrix composites (PMCs) reinforced with glass fibers is investigated. LCF conditions involve high loads reaching up to 90% of the material ultimate strength. LCF characterization of PMCs is carried out under tension-tension fatigue loading to identify the key physical phenomena occurring in PMCs under LCF conditions and to determine their unique characteristics. Analysis of experimental data indicates that finite strain rates, large strains and stress ratios may affect LCF behavior of PMC structures and the property degradation rates.

Interlaminar shear properties of polymer matrix composites: Strain rate effect

2007 ◽  
Vol 39 (12) ◽  
pp. 1043-1052 ◽  
Author(s):  
N.K. Naik ◽  
Addis Asmelash ◽  
Venkateswara Rao Kavala ◽  
Veerraju Ch
Keyword(s):  
Strain Rate ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Strain Rate Effect ◽  
Rate Effect ◽  
Matrix Composites ◽  
Shear Properties ◽  
Interlaminar Shear

Strain rate influence on nonlinear response of polymer matrix composites

2014 ◽  
Vol 36 (5) ◽  
pp. 800-810 ◽  
Author(s):  
Junjie Ye ◽  
Yuanying Qiu ◽  
Zhi Zhai ◽  
Xuefeng Chen
Keyword(s):  
Strain Rate ◽  
Polymer Matrix ◽  
Nonlinear Response ◽  
Polymer Matrix Composites ◽  
Matrix Composites

scholarly journals Role of Wood Flour on Physical and Mechanical Properties in Polymer Matrix Composites-A Critical Review

2021 ◽  
Vol 31 (2) ◽  
pp. 81-92
Author(s):  
Lalit Ranakoti ◽  
Pawan Kumar Rakesh ◽  
Brijesh Gangil
Keyword(s):  
Mechanical Properties ◽  
Polymer Composite ◽  
Material Science ◽  
Polymer Matrix Composites ◽  
Wood Flour ◽  
Natural Fibers ◽  
Physical And Mechanical Properties ◽  
Critical Parameters ◽  
Matrix Composites

Green and sustainable material is the utmost prerequisite for the advancement of a healthy society and fulfilling the necessary for the improvement in material science. Naturally obtaining wood flour has the competence to be reinforced as a filler substance in the polymer composite. The present article deals with the usage of wood flour as a filler in the polymer composite. The article comprises properties, characteristics, occurrence, the structure of wood, and the techniques implemented in the manufacturing of wood flour polymer composites. In addition, critical parameters and causes that can bring changes in the properties like tensile, flexural, impact and hardness of polymers are also discussed with the addition of wood flour alone and with nanoparticles. The advantages of using wood flour as a filler in the thermoset and thermoplastic polymers discussed, and its hybridization with various natural fibers was also discussed in the present study.

scholarly journals EFFECTS OF STRAIN RATE AND TEMPERATURE ON THE MECHANICAL PROPERTIES OF GFRP COMPOSITES

2011 ◽  
Vol 10 (1-2) ◽  
pp. 03 ◽  
Author(s):  
J. L. V. Coelho ◽  
J. M. L. Reis
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Strain Rate ◽  
Elevated Temperatures ◽  
Mechanical Response ◽  
Polymer Matrix Composites ◽  
Glass Fibers ◽  
Research Data ◽  
Matrix Composites ◽  
Gfrp Composites

In this work, the mechanical response of a composite material based on glass fibers embedded in an epoxy resin was experimentally studied as a function of strain rate and temperature. It was shown that for the temperature range from 23 to 100 °C the elastic properties of the composite are significant affected and the strain rate influences only the ultimate strength. The experimental research data and the approaches presented in this work should significantly extend our knowledge of the effect of elevated temperatures on the mechanical behavior of high temperature polymer matrix composites.

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