Thermooxidative Behavior of Out-of-autoclave Bismaleimide Composites

Abstract

Under elevated temperatures where Bismaleimides (BMI) are generally used, thermooxidative degradation of polymer matrix composites is dominated by oxygen diffusion and reaction. Long term isothermal aging can result in weight loss and development of an oxidized layer on the surface. In this work, weight loss was modeled using 3D transient diffusion-reaction simulations based on representative volume elements (RVE) using COMSOL Multiphysics. Coupled weight loss and diffusion-reaction models based on non-dimensional variable rate of oxidation were used to simulate thermooxidative behavior. Unidirectional BMI composite specimens were manufactured using out-of-autoclave processing and subsequently aged at 176 °C. Weight loss was monitored at regular intervals and simulation results were validated by comparison with experimental results.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Associate Chartered Management Accountant; Society for the Advancement of Material and Process Engineering (SAMPE), All rights reserved.

Publication Date

01 Jan 2014

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