scholarly journals Mixed-Mode Delamination Failures of Quasi-Isotropic Quasi- Homogeneous Carbon/Epoxy Laminated Composite

2017 ◽  
Author(s):  
Mahzan Johar ◽  
King Jye Wong ◽  
Mohd Nasir Tamin
Keyword(s):  
Mixed Mode ◽  
Laminated Composite

Experimental and Numerical Investigation of Mixed-Mode Fracture Properties of Woven Laminated Composite

2011 ◽  
Vol 471-472 ◽  
pp. 703-708
Author(s):  
Mohammad Hossein Heydari ◽  
Naghdali Choupani
Keyword(s):  
Fracture Toughness ◽  
Finite Element ◽  
Mixed Mode ◽  
Laminated Composite ◽  
Crack Growth Behavior ◽  
Mixed Mode Fracture ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Mode Fracture ◽  
Insight Into

Delamination is a major problem associated with composite materials that reduce the stiffness of structure used in aerospace, marine and automotive technology. Interlaminar fracture toughness, non dimensional stress intensity factors and delamination crack growth behavior were investigated for carbon fiber (CF)-polyester laminates. All tests were performed with modified version of Arcan specimen. By changing the loading angles in range of 0-90°, mode-I, mode-II and all mixed mode fracture toughness data were obtained. Correction factors were obtained with finite element analysis using Abaqus software. By employing experimentally measured critical loads and the aid of the finite element method, mixed-mode fracture toughness for the composite under consideration determined. The fracture surfaces of the CF-P under different mixed-mode loading conditions were examined by optical and scanning electron microscopy (SEM) to gain insight into the failure responses.

scholarly journals Probabilistic fracture investigation of symmetric angle ply laminated composite plates using displacement correlation method

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Achchhe Lal ◽  
P. Palekar Shailesh
Keyword(s):  
Mixed Mode ◽  
Perturbation Technique ◽  
Correlation Method ◽  
Laminated Composite ◽  
Second Order ◽  
Order Perturbation ◽  
Uniaxial Tensile ◽  
Direct Monte Carlo Simulation ◽  
Random System ◽  
System Properties

AbstractThe second order statistics of mixed mode stress intensity factors (MSIF) of single edge V-notched angle ply laminated composite plate subjected to uniaxial tensile load with uncertinity in the system properties using displacement correlation method (DCM) is evaluated. The random system properties such as material properties, crack opening and crack length are modelled as combined uncorrelated and correlated random system variables. A C0 finite element method (FEM) based on higher order shear deformation plate theory (HSDT) is used for basic formulation. The Taylor series based first order perturbation technique (FOPT), second order perturbation technique (SOPT) are used and direct Monte Carlo simulation (MCS) is performed to evaluate the statistics (mean and coefficient of variance) of the mixed mode SIFs. The present work signifies the accurate analysis of frature behaviour by influence of different random variables and fibre orientations on the fracture behaviour in angle ply laminates.

scholarly journals FEM Modeling of Delamination in AS4/PEEK Thermoplastic Composites under Mixed – Mode Bending Test

Mechanika ◽  
2020 ◽  
Vol 26 (2) ◽  
pp. 120-125
Author(s):  
IONESCU VIOREL
Keyword(s):  
Mixed Mode ◽  
Strain Energy ◽  
Laminated Composite ◽  
Bending Test ◽  
Von Mises Stress ◽  
Thermoplastic Composites ◽  
Displacement Curve ◽  
Fem Modeling ◽  
Energy Rate ◽  
Von Mises

Interfacial failure by delamination in the unidirectional AS4/PEEK laminated composite was simulated through this paper with a finite element method (FEM) based model developed with Comsol Multiphysics software. The mixed – mode bending (MMB) test was investigated numerically here after a successful validation of the model by comparing with experimental measurements of the load –displacement curve provided in the literature. The maximum delamination length of the specimens modeled, the corresponding von Mises stress distributions and the damage evolution function have been evaluated for different ratios between mode II strain energy rate and total strain energy rate GII/GT = 20%, 50% and 80%.

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