A method of stress analysis for interfacial property evaluation in thermoplastic composites

Song, Dong-Yeul; Takeda, Nobuo; Ogihara, Shinji

doi:10.1016/s0921-5093(99)00578-x

Cited by 12 publications

(10 citation statements)

References 8 publications

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“…The friction force comes about from normal forces generated by the difference of thermal expansion and modulus of matrix and fiber. There are some studies regarding stable deformation of sphere and fiber reinforced composites using a finite element approach with various debonding models [13–18].…”

Section: Introductionmentioning

confidence: 99%

Effect of stress transfer between fiber and matrix on toughness of polymer composite

Ichinose¹,

Ishikawa²,

Morimoto³

2011

Polymer Composites

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Thanks to their lightweight properties, formability and low cost, polymers have become an essential material for manufactured products. To improve the mechanical properties, almost all polymers are blended with some kind of fiber made from glass, carbon, organic or natural material. The importance of interfacial strength between matrix and fiber is a well known requirement for effective mechanical properties and some experimental results indicate that low interfacial strength helps increase the toughness of composites. In this paper, models of composite reinforced by fiber aligned with maximum principal stress under uni‐tensile loading are simulated. Based on the simulation result, we discuss the effect of interfacial strength, aspect ratio of fiber and friction force between matrix and fiber on stable deformation and provide the guidelines for establishing composites with high modulus and toughness. POLYM. COMPOS. 2011. © 2011 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Effect of stress transfer between fiber and matrix on toughness of polymer composite

Ichinose¹,

Ishikawa²,

Morimoto³

2011

Polymer Composites

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“…The radial stress at the outer surfaces of the matrix is zero [25]. Also, the stresses must be continuous across the fibre-matrix regions [26]. Consequently, the constants A 1 (z), A 2 (z) can be determined from these boundary and continuity equations as follows…”

Section: Boundary and Continuity Conditionsmentioning

confidence: 99%

Effect of fibre transverse isotropy on micro-residual stresses in polymeric composites

Shokrieh

Safarabadi

2011

The Journal of Strain Analysis for Engineering Design

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In this paper, the influence of transversely isotropic behaviour of the fibre on micro-residual stress fields is investigated. For this purpose, the energy method is utilized to predict the micro-structural stresses in polymer matrix composites under uniform thermal loads. The representative volume element (RVE) considered here includes a transversely isotropic fibre embedded in an isotropic polymer matrix. Based on the energy method, a three-dimensional closed-form solution for micro-residual stresses is obtained. The analytical results are evaluated with a finite element solution. The analysis shows that the transversely isotropic behaviour of the fibre greatly increases the fibre and matrix axial residual stresses in comparison with the isotropic fibre assumption. Fibre anisotropy has a significant effect on the interfacial shear stress distribution, in contrast with the interfacial radial stress field. Both the finite element solution and analytical method result in a similar behaviour for micro-residual stresses distribution along the fibre length. However, the finite element method cannot satisfy the stress-free condition for the residual shear stress at the fibre end due to the stress singularity.

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“…The constants in Equation (1) are given by Jones [13] where a ij are the components of the compliance matrix. The elements of compliance matrix are given as (3) where m = cos θ, n = sin θ. Boundary conditions for this beam are given as,…”

Section: Elastic Analysismentioning

confidence: 99%

“…Cartledge and Baillic [2] studied microstructural and mechanical properties of nylon/glass composite. Song et al [3] investigated an analysis of stress transfer between the fiber and matrix in a single fiber reinforced composite which is useful to evaluate the effect of the properties of the interphase layer between the fibers and matrix. Maheri et al [4] investigated the effect of temperature on the dynamic characteristics of heat resistant thermoplastic composites.…”

Section: Introductionmentioning

confidence: 99%

An Elasto-Plastic Stress Analysis in a Polymer Matrix Composite Beam of Arbitrary Orientation Subjected to Transverse Linearly Distributed Load

Esendemir

2002

Journal of Reinforced Plastics and Composites

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An elasto-plastic stress analysis is carried out in a low density polyethylene thermoplastic cantilever beam of arbitrary orientation subjected to transverse linearly distributed load reinforced by Cr-Ni steel fibers analytically. In the elasto-plastic solution, the material is assumed to be perfectly plastic. The expansion of the plastic region and the residual stress component of σ x are determined for 0°, 30°, 45°, 60° and 90° orientation angles. The yielding begins at the upper and lower surfaces of the beam at the same distances from the free end. The intensity of residual stress component of σ x is maximum at the upper and lower surfaces but residual stress component of τ xy is maximum on the x axis of the beam. Sample problems are given for various angles, x axis of the beam is used to obtain the location of the elasto-plastic boundary and to calculate elastic, elasto-plastic and residual normal and shear stresses.

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A method of stress analysis for interfacial property evaluation in thermoplastic composites

Cited by 12 publications

References 8 publications

Effect of stress transfer between fiber and matrix on toughness of polymer composite

Effect of stress transfer between fiber and matrix on toughness of polymer composite

Effect of fibre transverse isotropy on micro-residual stresses in polymeric composites

An Elasto-Plastic Stress Analysis in a Polymer Matrix Composite Beam of Arbitrary Orientation Subjected to Transverse Linearly Distributed Load

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