Local Stress Distributions in Fiber-Reinforced Composites with Consideration of Thermal Stresses During the Curing Process

2021 ◽  
Author(s):  
Yangin Li ◽  
Dehai Zhang
Keyword(s):  
Thermal Stresses ◽  
Local Stress ◽  
Fiber Reinforced Composites ◽  
Curing Process ◽  
Reinforced Composites ◽  
Stress Distributions ◽  
Fiber Reinforced

Determination of Flexible Interlayer Thickness for Fiber Reinforced Composites

1989 ◽  
Vol 170 ◽  
Author(s):  
King H. Lo ◽  
Robert W. Schmitz ◽  
William G. Gottenberg
Keyword(s):  
Fiber Composites ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Stress Distributions ◽  
Interlayer Thickness ◽  
Fiber Reinforced ◽  
The Matrix ◽  
Composite Cylinders ◽  
Selection Of

AbstractThe influence of flexible interlayers/interphases on the performance of unidirectional fiber reinforced composites is studied. Micromechanical analysis based on the embedded composite cylinders model is used to study the stiffness as well as the internal stress distributions within the matrix phase of composites. Based on the results of the analysis, a criterion is proposed for the selection of optimal interlayer thickness for fiber composites. The proposed criterion gives results which seem to correlate well with the experimental data published in the literature.

Investigation of Residual Thermal Stresses in Fiber-Reinforced Composites Incorporating Inhomogeneous Interphase Region

2010 ◽  
Author(s):  
M. M. Shokrieh ◽  
A. R. Ghanei Mohammadi
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Finite Element Model ◽  
Thermal Stresses ◽  
Element Model ◽  
Fiber Reinforced Composites ◽  
Radial Coordinate ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Fe Method

In this paper, a new finite element model has been introduced with the aim of efficient investigation of residual thermal stresses in fiber-reinforced composites, in which the inhomogeneous interphase is considered. For the inhomogeneous interphase modeling, four different kinds of material properties variation of the interphase (power, reciprocal, cubic and exponential variations) with the radial coordinate have been used. A mono fiber circular unit cell is considered using a finite element (FE) method. Extending the mono fiber model, FE models with different arrays of fibers have been created to investigate the effects of neighboring fibers on the results. In order to assure the convergence of results, a convergence analysis has been carried out for each of the models. To verify the finite element model, the FE results are compared with theoretical results available in the literature. In this paper, three different types of RVE configurations, circular, square and hexagonal are modeled and the effects of each type of fiber packing are studied. Performing an extensive study, the appropriate boundary conditions for RVEs are presented. The boundary conditions presented in this research are proved to be able to model the overall behavior efficiently.

scholarly journals Local Stress Fields in A Unidirectional Fiber-Reinforced Composite with A Non-Homogeneous Interphase Region: Solution

1992 ◽  
Vol 1 (3) ◽  
pp. 096369359200100 ◽  
Author(s):  
K Jayaraman ◽  
K L Reifsnider
Keyword(s):  
Solution Method ◽  
Local Stress ◽  
Fiber Reinforced Composites ◽  
Stress Fields ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Unidirectional Fiber ◽  
Interphase Region ◽  
Reinforced Composite

Attention has been focused recently on the interphase in continuous, unidirectional fiber-reinforced composites. In this study, the interphase region is modeled as a non-homogeneous, orthotropic material with continuously varying properties. A previously proposed solution method is used to determine the local stress fields in the constituents - the fiber, interphase and matrix - and the results are presented.

An Empirical Relationship to Predict Damages in Carbon Fiber Reinforced Composites under Extreme Thermal Cycling Conditions

2012 ◽  
Vol 531-532 ◽  
pp. 153-158
Author(s):  
Fateeha Nisar Siddiqui ◽  
Nada Saleh ◽  
Ayesha Rahat ◽  
Asif Israr ◽  
Atiq Ur Rehman
Keyword(s):  
Carbon Fiber ◽  
Thermal Cycling ◽  
Thermal Loading ◽  
Thermal Stresses ◽  
Fiber Reinforced Composites ◽  
Space Environment ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Composites ◽  
Carbon Fiber Reinforced

Carbon Fiber Reinforced Composites are presently used in satellites structure for better performance during extreme thermal cycling space environment. These materials display unexpected failure because the satellite periodically goes into and out of the earth shadow region on orbit, leading to a change in its surface temperature. As the coefficient of thermal expansion of carbon fibers is an order of magnitude lower than that of the polymer matrix, repeated thermal stresses are generated in the composites under the alternative temperature field, resulting in damage to the materials and a decrease in mechanical properties. The main objective of this study is to develop an analytical model to predict the damage produce in the composites subjected to extreme thermal loading. These thermal loading also causes the material to release strain energy. The results are presented in terms of strain produced during thermal cycling and also in the process of delamination.

scholarly journals Local Stress Fields in A Unidirectional Fiber-Reinforced Composite with A Non-Homogeneous Interphase Region: Formulation

1992 ◽  
Vol 1 (2) ◽  
pp. 096369359200100 ◽  
Author(s):  
K Jayaraman ◽  
K L Reifsnider ◽  
Alexander Giacco
Keyword(s):  
Orthotropic Material ◽  
Local Stress ◽  
Fiber Reinforced Composites ◽  
Stress Fields ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Unidirectional Fiber ◽  
Interphase Region ◽  
Reinforced Composite

Attention has been focused recently on the interphase in fiber-reinforced composites. A methodology is proposed to determine the local stress fields in a unidirectional fiber-reinforced composite with a non-homogeneous interphase region. The interphase is modeled as an orthotropic material with continuously varying properties.

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