Study of moisture diffusivity in high-temperature polymeric matrix composites

Yunn Tzu Yu, Kishore Pochiraju

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

High temperature polymeric matrix composites (HTPMC) are widely used in aerospace applications. In order to predict the long-term effects of moisture interaction with the polymeric matrix composites, both experimental and simulation approaches are used to obtain the temperature dependent moisture diffusivity of HTPMC. Absorption and desorption tests are used to experimentally determine moisture diffusivities of neat resin PMR-15 at different temperatures. Diffusivity is determined from the weight change based on the initial slope of diffusion curve with the assumption of Fickian diffusion. The results also include the relative humidity dependent equilibrium moisture concentration and a relationship between the relative humidity and equilibrium moisture concentration. As the measurement at high temperature (e.g. 288°C) is precluded by blistering, Arrhenius relationship is used to estimate the diffusivity at the typical operation temperatures of this resin. Homogenization methods are used to obtain the anisotropic effective moisture diffusivities of HTPMC with periodic structure. Three-dimensional finite element method is used to model representative volume elements (RVE) in composites. Particular attention is paid to the fiber-matrix interphase region and its influence on the composite behavior. Numerical simulations and selected correlations with experimental results will be presented.

Original languageEnglish
Title of host publicationSAMPE '07
Subtitle of host publicationM and P - From Coast to Coast and Around the World; Conference Proceedings
StatePublished - 2007
EventSAMPE '07: M and P - From Coast to Coast and Around the World - Baltimore, MD, United States
Duration: 3 Jun 20077 Jun 2007

Publication series

NameInternational SAMPE Symposium and Exhibition (Proceedings)
Volume52
ISSN (Print)0891-0138

Conference

ConferenceSAMPE '07: M and P - From Coast to Coast and Around the World
Country/TerritoryUnited States
CityBaltimore, MD
Period3/06/077/06/07

Keywords

  • Absorption
  • Diffusivity
  • PMR-15

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