Application of Finite Element Analysis to the Interface Decohesion of CFRP/SMA Composite

2015 ◽  
Vol 752-753 ◽  
pp. 125-129
Author(s):  
Noh Yu Kim ◽  
Sung Young
Keyword(s):  
Finite Element ◽  
Cohesive Zone Model ◽  
Three Dimensional ◽  
Axial Direction ◽  
Zone Model ◽  
Stress Profile ◽  
Element Analysis ◽  
Reinforced Polymer ◽  
Shear Stress Profile ◽  
The Wire

In this work, finite element calculations were carried out to simulate wire pullout process of the shape memory alloy (SMA) wire/carbon fiber reinforced polymer (CFRP) hybrid composite. Three-dimensional cohesive zone model was used for the bonding interface between the SMA and the CFRP. Phase transformation behavior of the SMA wire was accounted for by using a multi-variant constitutive model. The numerical parameters were fitted using an experimental measurement reported by Jang and Kishi. Young’s modulus of the wire affected the force vs. elongation curve most effectively. It is shown that the actual shear stress profile is not constant but it varies significantly along the axial direction of the wire. Additional toughness due to the SMA wire was higher than the case of a purely elastic wire, and the toughness increment was approximately 21 kJ/m2. This value is comparable to the typical toughness value of CFRP.

Progressive failure analysis of scarf-repaired composite laminate based on damage constitutive model

2016 ◽  
Vol 233 (2) ◽  
pp. 180-188 ◽  
Author(s):  
Qiuyi Shen ◽  
Zhenghao Zhu ◽  
Yi Liu
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Composite Laminate ◽  
Damage Mechanics ◽  
Cohesive Zone Model ◽  
Load Capacity ◽  
Three Dimensional ◽  
Zone Model ◽  
State Variables ◽  
Element Analysis

A three-dimensional finite element model for scarf-repaired composite laminate was established on continuum damage model to predict the load capacity under tensile loading. The mixed-mode cohesive zone model was adopted to the debonding behavior analysis of adhesive. Damage condition and failure of laminates and adhesive were subsequently addressed. A three-dimensional bilinear constitutive model was developed for composite materials based on damage mechanics and applied to damage evolution and loading capacity analyses by quantifying damage level through damage state variables. The numerical analyses were implemented with ABAQUS finite element analysis by coding the constitutive model into material subroutine VUMAT. Good agreement between the numerical and experimental results shows the accuracy and adaptability of the model.

Three-Dimensional Finite Element Analysis of Skin-Pass Rolling and New Models for Process Control

2017 ◽  
Vol 139 (9) ◽  
Author(s):  
Sung Jin Yoon ◽  
Tae Jin Shin ◽  
Jae Sang Lee ◽  
Sang Moo Hwang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Coupled Analysis ◽  
Stress Profile ◽  
Fe Model ◽  
Element Analysis ◽  
Skin Pass ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper describes in detail the deformation behavior of the rolls and strip predicted from the three-dimensional finite element analysis of skin-pass rolling. The predictions are made on the basis of the coupled analysis of elastic deformation of the rolls and elastic–plastic deformation of the strip. Predictions from the proposed finite element (FE) model are compared with experimental data from laboratory-scale cold rolling mills. Then, proposed are models for the prediction of the roll force profile and for the prediction of the residual stress profile. The prediction accuracy of the models is examined through comparison with the predictions from the FE model.

Finite Element Analysis for the Effect of Weak Interface on the Ratcheting of Particle Reinforced Composites

2013 ◽  
Vol 785-786 ◽  
pp. 214-219
Author(s):  
Ya Le Yan ◽  
Juan Zhang ◽  
Su Juan Guo
Keyword(s):  
Finite Element ◽  
Cohesive Zone Model ◽  
Experimental Results ◽  
Zone Model ◽  
Matrix Composites ◽  
Weak Interface ◽  
Element Analysis ◽  
Ratcheting Strain ◽  
Element Simulation ◽  
Particulate Reinforced

The deformation behavior of particulate reinforced metal matrix composites (PRMMCs) under monotonic and cyclic loadings was simulated by FEA method. Base on the cohesive zone model, the effect of the interface between particle and matrix was considered. Then, the finite element simulation of the PRMMCs with an ideal interface and weak interface was compared with corresponding experimental results. It is shown that: with a weak interface been considered in the finite element simulations, the resistance of PRMMCs to the ratcheting strain was reduced, which gets more closed to the experimental results.

Interface Delamination of Diamond-Coated Carbide Tools Considering Coating Fractures by XFEM

2013 ◽  
Author(s):  
Ping Lu ◽  
Kevin Chou
Keyword(s):  
Finite Element ◽  
Cohesive Zone Model ◽  
Three Dimensional ◽  
Maximum Principal Stress ◽  
Initial Crack ◽  
Zone Model ◽  
Diamond Coating ◽  
Interface Delamination ◽  
Coated Carbide ◽  
Coated Carbide Tools

Interface delamination is the major failure mode of diamond-coated carbide tools in machining. On the other hand, coating cracking is possibly accompanied during a tribological process that induces the delamination phenomenon. However, such an influence between the two failure behaviors has not been investigated in a quantitative way to better understand and design diamond coating tools. In this study, a three-dimensional (3D) indentation model combining cohesive interactions and extended finite element method (XFEM) was developed to investigate the diamond-coating, carbide-substrate interface behavior with the incorporation of coating cracking. The interface interaction was based on a cohesive zone model (CZM) with a bilinear traction-separation law. XFEM was applied to the coating domain to model cracking in the diamond coating with a damage criterion of the maximum principal stress. Deposition stresses were also included to investigate their effect on the coating delamination and fractures. The model was implemented in finite element (FE) codes to analyze the cone crack in brittle coatings, as well as the interface delamination of diamond coated carbide tools. The XFEM model was validated by the indentation testing data from literature in crack initiations and propagations in brittle materials. FE results from the indentation on diamond-coated tools show that the interface delamination size and the loading force become smaller when coating fractures are incorporated in the model, and the deposition stresses will increase the initial crack radius as well as the critical load for delamination in diamond coatings.

Crack Extensions in Compact Tension Specimens of Hydrided Irradiated Zr-2.5Nb Materials Using Cohesive Zone Model

2017 ◽  
Author(s):  
Shengjia Wu ◽  
Shin-Jang Sung ◽  
Jwo Pan ◽  
Poh-Sang Lam ◽  
Douglas A. Scarth
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cohesive Zone ◽  
Crack Extension ◽  
Cohesive Zone Model ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Zone Model ◽  
Element Analysis ◽  
The Finite Element Analysis

The crack extension in a compact tension specimen of hydrided irradiated Zr-2.5Nb material is investigated by a two-dimensional plane stress finite element analysis. The stress-strain relation of the Zr-2.5Nb material for the finite element analysis is obtained from fitting the experimental tensile stress-strain curve of the irradiated Zr-2.5Nb material without hydrides by a three-dimensional finite element analysis. The calibration of the cohesive zone model with a trapezoidal traction-separation law is based on fitting the load-displacement-crack extension experimental data of a compact tension specimen of hydrided irradiated Zr-2.5Nb material. The general trends of the load-displacement, crack extension-displacement, and load-crack extension curves obtained from the finite element analysis based on the calibrated cohesive zone model are in agreement with the experimental data.

The Finite Element Simulation and Analysis of Polymer Tube Coextrusion Process

2011 ◽  
Vol 314-316 ◽  
pp. 1250-1253
Author(s):  
Min Zhang ◽  
Guo Qiang Yuan ◽  
Sheng Sun ◽  
Yu Xi Jia
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Stream Line ◽  
Stress Profile ◽  
The Finite Element Method ◽  
Extrudate Swell ◽  
Element Simulation ◽  
Composite Pipe ◽  
Shear Stress Profile ◽  
Polymer Tube

The three-dimensional numerical simulation model of two polymer melts flowing through the traffic circle section path was founded. The coextrusion process of composite pipe was simulated used the finite element method. The stream line method was used to simulate the extrudate swell. Such simulated results as the location and shape of coextrusion interface, the shear stress profile were analyzed. It is found that the maximum shear rate occur near the convergence section of the outer polymer. The interface excursion is less than 1mm in the die path. As the melt flow out of the die, the interface excursion increase distinctly, the value is up to 6mm. The extrudate swell rate is 21% along the radial direction.

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