Residual stress and failure analyses of polymer matrix composites considering thermal cycling and temperature effects based on classical laminate plate theory

2018 ◽  
Vol 53 (21) ◽  
pp. 3021-3032 ◽  
Author(s):  
AR Ghasemi ◽  
A Tabatabaeian ◽  
M Moradi
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Thermal Cycling ◽  
Polymer Matrix Composites ◽  
Plate Theory ◽  
Laminate Plate ◽  
Failure Behavior ◽  
Matrix Composites ◽  
Failure Index ◽  
Classical Laminate Plate Theory

The effects of temperature and thermal cycling on the residual stress and failure behavior of different polymer matrix composites have been investigated in this paper. A new algorithm within the framework of the classical laminate plate theory (CLPT) has been presented to calculate the residual stresses. The modified Tsai-Wu failure criterion has been employed to study the failure behavior of different stacking sequences. Numerical results show that the residual stress and failure index of the composites decrease with the increase of the temperature. It has also been established that thermal cycling condition leads to reduction of the residual stresses and increment of the failure index.

scholarly journals Effect of Manufacturing on the Transverse Response of Polymer Matrix Composites

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2491
Author(s):  
Sagar P. Shah ◽  
Marianna Maiarù
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Process Modeling ◽  
Polymer Matrix Composites ◽  
Effect Study ◽  
Matrix Composites ◽  
Computationally Efficient ◽  
Thermoset Composites ◽  
Residual Stress State ◽  
Composite Stiffness

The effect of residual stress build-up on the transverse properties of thermoset composites is studied through direct and inverse process modeling approaches. Progressive damage analysis is implemented to characterize composite stiffness and strength of cured composites microstructures. A size effect study is proposed to define the appropriate dimensions of Representative Volume Elements (RVEs). A comparison between periodic (PBCs) and flat (FBCs) boundary conditions during curing is performed on converged RVEs to establish computationally efficient methodologies. Transverse properties are analyzed as a function of the fiber packing through the nearest fiber distance statistical descriptor. A reasonable mechanical equivalence is achieved for RVEs consisting of 40 fibers. It has been found that process-induced residual stresses and fiber packing significantly contribute to the scatter in composites transverse strength. Variation of ±5% in average strength and 18% in standard deviation are observed with respect to ideally cured RVEs that neglect residual stresses. It is established that process modeling is needed to optimize the residual stress state and improve composite performance.

Finite Element Modeling for Prediction of Residual Stresses in Fiber Reinforced Metal Matrix Composites

1993 ◽  
Author(s):  
Partha Rangaswamy ◽  
N. Jayaraman
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Material ◽  
Unit Cell ◽  
Experimental Results ◽  
Matrix Composites ◽  
Layer Removal

Abstract In metal matrix composites residual stresses developing during the cool-down process after consolidation due to mismatch in thermal expansion coefficients between the ceramic fibers and metal matrix have been predicted using finite element analysis. Conventionally, unit cell models consisting of a quarter fiber surrounded by the matrix material have been developed for analyzing this problem. Such models have successfully predicted the stresses at the fiber-matrix interface. However, experimental work to measure residual stresses have always been on surfaces far away from the interface region. In this paper, models based on the conventional unit cell (one quarter fiber), one fiber, two fibers have been analyzed. In addition, using the element birth/death options available in the FEM code, the surface layer removal process that is conventionally used in the residual stress measuring technique has been simulated in the model. Such layer removal technique allows us to determine the average surface residual stress after each layer is removed and a direct comparison with experimental results are therefore possible. The predictions are compared with experimental results of an eight-ply unidirectional composite with Ti-24Al-11 Nb as matrix material reinforced with SCS-6 fibers.

S102 Residual Stresses in Metal Matrix Composites for Heat Sink Applications During Thermal Cycling

2008 ◽  
Vol 23 (2) ◽  
pp. 188-188
Author(s):  
M. Schöbel ◽  
H. P. Degischer ◽  
T. Buslaps ◽  
M. di Michiel ◽  
T. Poeste ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Thermal Cycling ◽  
Metal Matrix Composites ◽  
Heat Sink ◽  
Metal Matrix ◽  
Matrix Composites

scholarly journals A Review of Prestressed Fibre-Reinforced Polymer Matrix Composites

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 60
Author(s):  
Raphael Olabanji Ogunleye ◽  
Sona Rusnakova
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Residual Stresses ◽  
Matrix Composite ◽  
Polymer Matrix ◽  
Moisture Absorption ◽  
Polymer Matrix Composites ◽  
Great Influence ◽  
Polymer Matrix Composite ◽  
Matrix Composites

This review examines various studies on reducing tensile stresses generated in a polymer matrix composite without increasing the mass or dimension of the material. The sources of residual stresses and their impacts on the developed composite were identified, and the different techniques used in limiting residual stresses were also discussed. Furthermore, the review elaborates on fibre-prestressing techniques based on elastically (EPPMC) and viscoelastically (VPPMC) prestressed polymer matrix composites, while advantages and limitations associated with EPPMC and VPPMC methods are also explained. The report shows that tensile residual stresses are induced in a polymer matrix composite during production as a result of unequal expansion, moisture absorption and chemical shrinkage; their manifestations have detrimental effects on the mechanical properties of the polymer composite. Both EPPMC and VPPMC have great influence in reducing residual stresses in the polymer matrix and thereby improving the mechanical properties of composite materials. The reports from this study provide some basis for selecting a suitable technique for prestressing as well as measuring residual stresses in composite materials.

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