A cohesive zone model incorporating a Coulomb friction law for fiber-reinforced composites

2018 ◽  
Vol 157 ◽  
pp. 195-201 ◽  
Author(s):  
Guodong Nian ◽  
Qiyang Li ◽  
Qiang Xu ◽  
Shaoxing Qu
Keyword(s):  
Cohesive Zone ◽  
Coulomb Friction ◽  
Cohesive Zone Model ◽  
Fiber Reinforced Composites ◽  
Zone Model ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Friction Law ◽  
Coulomb Friction Law

The quantitative analysis of tensile strength of additively manufactured continuous carbon fiber reinforced polylactic acid (PLA)

2019 ◽  
Vol 25 (10) ◽  
pp. 1624-1636 ◽  
Author(s):  
Hongbin Li ◽  
Taiyong Wang ◽  
Sanjay Joshi ◽  
Zhiqiang Yu
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Fracture Mechanism ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Zone Model ◽  
Fiber Reinforced ◽  
Continuous Fiber ◽  
Content Type ◽  
Continuous Carbon Fiber

Purpose Continuous fiber-reinforced thermoplastic composites are being widely used in industry, but the fundamental understanding of their properties is still limited. The purpose of this paper is to quantitatively study the effects of carbon fiber content on the tensile strength of continuous carbon fiber-reinforced polylactic acid (CCFRPLA) fabricated through additive manufacturing using the fused deposition modeling (FDM) process. Design/methodology/approach The strength of these materials is highly dependent on the interface that forms between the continuous fiber and the plastic. A cohesive zone model is proposed as a theoretical means to understand the effect of carbon fiber on the tensile strength properties of CCFRPLA. The interface formation mechanism is explored, and the single fiber pulling-out experiment is implemented to investigate the interface properties of CCFRPLA. The fracture mechanism is also explored by using the cohesive zone model. Findings The interface between carbon fiber and PLA plays the main role in transferring external load to other fibers within CCFRPLA. The proposed model established in this paper quantitatively reveals the effects of continuous carbon fiber on the mechanical properties of CCFRPLA. The experimental results using additively manufacturing CCFRPLA provide validation and explanation of the observations based on the quantitative model that is established based on the micro-interface mechanics. Research limitations/implications The predict model is established imagining that all the fibers and PLA form a perfect interface. While in a practical situation, only the peripheral carbon fibers of the carbon fiber bundle can fully infiltrate with PLA and form a transmission interface. These internal fibers that cannot contract with PLA fully, because of the limit space of the nozzle, will not form an effective interface. Originality/value This paper theoretically reveals the fracture mechanism of CCFRPLA and provides a prediction model to estimate the tensile strength of CCFRPLA with different carbon fiber contents.

Finite element modeling of glass particle reinforced epoxy composites under uniaxial compression and sliding wear

2021 ◽  
Vol 63 (7) ◽  
pp. 645-653
Author(s):  
Sait Ozmen Eruslu
Keyword(s):  
Cohesive Zone ◽  
Sliding Wear ◽  
Cohesive Zone Model ◽  
Glass Particle ◽  
Epoxy Composites ◽  
Plastic Behavior ◽  
Zone Model ◽  
Reinforced Composites ◽  
Effective Parameters ◽  
Bonded Interface

Abstract In this study, the failure mechanism of glass particle epoxy composites was investigated under compression and sliding wear. Random fiber distribution with minimum interfiber distance was modeled by representative volume elements (RVEs). Spherical and platelet type glass particles were used for the reinforcements. A numerical simulation of the elastic properties of composites was performed for a perfectly bonded interface, and the results were compared using the Mori Tanaka mean field approach. The elastic stiffness results indicated that the platelet reinforced composites bore more load than spherical ones because of the aspect ratio effects. The separation distance based cohesive zone model was applied to modeling the failure zone at the particle matrix interfaces to establish sliding wear. The effect of the perfectly bonded interface and the cohesive zone interface on overall stiffness and elasto-plastic behavior were discussed. The cohesive zone interface was found to be effective at the interface in terms of the strength and debonding characteristics of the composites. The results were compared with the sliding wear test results of glass particle reinforced composites. The numerical and sliding wear experimental results indicated that matrix yield stress, plastic strain, particle penetration at the contact interface and particle stress are found to be effective parameters for the debonding mechanism.

Simulation and Analysis on Fiber Reinforced Rubber Matrix Sealing Composite Based on Cohesive Zone Model

2019 ◽  
Vol 953 ◽  
pp. 65-71
Author(s):  
Xiao Ming Yu ◽  
Bin Zhang ◽  
Jia Min Shen ◽  
Yue Li ◽  
Sai Sai Liu
Keyword(s):  
Elastic Modulus ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Element Model ◽  
Interfacial Debonding ◽  
Interfacial Stress ◽  
Rubber Matrix ◽  
Zone Model ◽  
Fiber Reinforced ◽  
Pull Out

A finite element model on the single fiber pull-out test of short fiber reinforced rubber matrix sealing composites (SFRC) were established. The effects of the interphase properties on the interfacial stress distribution and initial debonding strain are investigated based on the cohesive zone model (CZM). The influences of interphase thicknesses and elastic modulus on the interfacial debonding behavior of SFRC are obtained. The results show that the interfacial initial debonding strain increases with the increasement of interphase thickness, and it decreases with the increasement of interphase elastic modulus. An interphase thickness of 0.4 μm and an interphase elastic modulus of about 750 MPa are optimal to restrain the initiation of the interfacial debonding.

Numerical Study on Effects of Interphase in Natural Short Fiber Reinforced Polymer Composite Based on Cohesive Zone Model

2013 ◽  
Vol 275-277 ◽  
pp. 1646-1649 ◽  
Author(s):  
Min Shen ◽  
Yan Li Duan ◽  
Yang Liu ◽  
Dong Chao Liang
Keyword(s):  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Numerical Study ◽  
Simulation Method ◽  
Short Fiber ◽  
Zone Model ◽  
Fiber Reinforced ◽  
Motor Industry ◽  
Reinforced Polymer ◽  
Three Phase

Natural short fiber reinforced polypropylene (PP) composite has great significance both in commercial and environmental and is widely used in motor industry. Its local inhomogeneity and interphase both affect the macroscopic properties of the composite. These phenomena are still difficult to observe and study accurately in the experiment. A cohesive zone model (CZM) based numerical simulation method is presented in this paper. The three-phase (matrix-interphase-fiber) model considering some different factors was developed to study the effects of interphase parameters on the mechanical properties of the composite.

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