SYMPOSIA PAPER Published: 01 January 1998

Effect of Cross-Sectional Shapes of Polysulfide Sealant on Shear Fatigue Resistance to Sliding Joint Movement


The effect of cross-sectional shapes of polysulfide sealing beads on shear fatigue resistance to sliding joint movement was studied experimentally and analytically. Six kinds of sealing beads that were different in the depth of their concavity were repeatedly deformed by shear joint movement. Cracks appeared in surface near substrates or in the middle of surfaces in some specimens, and developed in parallel to substrates or in X-shape. The time to cracking became shorter for the specimen with deeper concave shape. To learn the reason for these results, the surface stresses of the beads were studied using a finite element method. It was concluded from both experimental and analytical results that a durable cross-section of a sealing bead to shear joint movement is rectangular or slightly concave shapes.

Author Information

Tanaka, K
Miyauchi, H
Hirai, T
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Developed by Committee: C24
Pages: 43–50
DOI: 10.1520/STP15665S
ISBN-EB: 978-0-8031-5385-1
ISBN-13: 978-0-8031-2480-6