Journal Published Online: 01 December 1984
Volume 6, Issue 4

Analysis of Neat Resin Cracking Induced by Rapid Moisture Loss

CODEN: JCTRER

Abstract

During routine moisture conditioning of neat (unreinforced) resin test specimens of two different types of epoxy polymers, the active humidity control of the chamber failed, causing a rapid drop in the humidity level. Approximately half of the specimens of one material cracked while none of the specimens of the other material were damaged. The accident was later recreated, monitoring the cracking as a function of time using acoustic emission sensors mounted on individual specimens, while also recording the relative humidity decrease as a function of time. An analytical study was also performed, using a finite-element finite-difference technique to predict the moisture gradients in the specimens and a finite-element analysis to predict the initiation and propagation of cracking as a function of time. The results presented here demonstrate the ability to predict cracking and indicate the material parameters that dominate the process.

Author Information

Mahishi, JM
Composite Materials Research Group, University of Wyoming, Laramie, WY
Adams, DF
Composite Materials Research Group, University of Wyoming, Laramie, WY
Pages: 5
Price: $25.00
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Stock #: CTR10837J
ISSN: 0884-6804
DOI: 10.1520/CTR10837J