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Fatigue crack propagation of sheet molding compounds in various evironments

✍ Scribed by S. V. Hoa; A. D. Ngo; T. S. Sankar

Book ID
104510908
Publisher
Society for Plastic Engineers
Year
1981
Tongue
English
Weight
592 KB
Volume
2
Category
Article
ISSN
0272-8397

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✦ Synopsis

Abstract

The effect of the absorption of water and isooctane on the rate of fatigue crack propagation of sheet molding compounds (SMC‐R30 and SMC‐R65) was investigated. A crack extension gage was used to measure the crack length. Results show that the absorption of water decreases the rate of fatigue crack propagation in the initial cycles but increases the rate of propagation in the final cycle. The absorption of isooctane into SMC‐R65 tends to decrease the rate of fatigue crack propagation. Microscopic observation shows considerable swelling of the polyester matrix due to the absorption of water and no significant apparent effect due to the absorption of isooctane.

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