Books

Heat Transfer in Polymer Composite Materials: Forming Processes Edited By: Nicolas Boyard

Chapter 5: From the Characterization and Modeling of Cure-Dependent Properties of Composite Materials to the Simulation of Residual Stresses

Author: Dr. Yasir Nawab

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Summary

The use of composite materials has increased significantly in recent years in aerospace, naval and other high-tech applications. This chapter provides a discussion on the factors inducing residual stress into the composite parts and its associated problems, methods of determination of composite properties and modeling the residual stress in composite plates using analytical methods. It presents the major parameters that contribute toward the formation of residual stress in the thermoset composites. Determination of composite properties during and after cure is a prerequisite for modeling the residual stress in the composite. The self-consistent model allows determining the macroscopic elasticity tensor, coefficients of thermal expansion and chemical shrinkage of ply from the mechanical, thermal and chemical properties of the constituents. For the calculation of warpage in the laminated plates, two approaches exist: the linear approach, also named classical laminate theory, and the nonlinear approach.

 

Advanced Textile Testing Techniques Edited by: Sheraz Ahmad

Chapter 9: Composite materials testing

Author:  Khubab Shaker, Yasir Nawab

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Summary

This book chapter focuses on the characterization techniques for the composite materials. These are broadly classified into physical, mechanical and non-destructive testing. The physical testings include surface morphology, analytical testing, thermal properties and moisture absorption. The mechanical testing techniques explained in the chapter are tensile, flexural, compression, impact, hardness, shear and peel off test. While ultra-sonication, radiography, shearography, thermography and visual inspection are some forms of the non-destructive testing.