Micromechanical effect of pores on elastic properties of polymer matrix composites

Chawla, K and Raju, B and Subbappa, DB and Kancherla, KB and Roy Mahapatra, D (2020) Micromechanical effect of pores on elastic properties of polymer matrix composites. In: Polymer Composites . (In Press)

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Abstract

Advanced composite polymer matrix and their different manufacturing processes tend to develop pores of varying size and play a major limiting role in residual stress, damage initiation, matrix cracking, strength, and durability. Direct imaging or simulations to understand the pore formation mechanism in the viscous polymer is difficult. Ultimately, the mechanical performance of the solidified matrix needs better prediction. This paper presents a stochastic micromechanical model, including the effect of pores' formation on the polymer matrix's elastic properties. Theoretical homogenization based micromechanical models for polymer composites is reviewed in the first part. Later, a micromechanical model is proposed considering the different stages of pore formation in a polymer matrix. Polymer samples are fabricated for determining the pore distribution parameters and used appropriately in the proposed model to estimate the elastic properties for a given distribution and volume fraction of the pores. A modified Mori-Tanaka homogenization approach and a differential scheme of inclusion of pores are incorporated in the model. Results obtained from the proposed model are compared with the experimental measurements, and a significant correlation is found. © 2020 Society of Plastics Engineers

Item Type:	Journal Article
Publication:	Polymer Composites
Publisher:	John Wiley and Sons Inc
Additional Information:	Copyright to this article belongs to John Wiley and Sons Inc
Keywords:	Elasticity; Polymer matrix; Pore size; Stochastic models; Stochastic systems, Advanced composites; Differential scheme; Elastic properties; Homogenization approach; Manufacturing process; Mechanical performance; Micro-mechanical modeling; Micromechanical model, Polymer matrix composites
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	04 Feb 2021 09:53
Last Modified:	04 Feb 2021 09:53
URI:	http://eprints.iisc.ac.in/id/eprint/67892

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