Effect of Temperature on Stresses and Delamination Failure of Z-Pinned Joints
Abstract
Although z-pins have been shown effective in preventing delaminations in adhesively bonded and co-cured joints, their applicability depends on a reliable assessment of the strength of a z-pin-composite assembly. In particular, high residual thermal stresses that have been found in experiments dictate the necessity in a local stress analysis. Elevated temperature applied to the joint during its lifetime may also affect its effectiveness in preventing delaminations. The present paper illustrates an approach to determining local residual stresses confirming the observations regarding a possible delamination and cracking in the composite structure due to high post-processing transverse stresses. The analysis of the effect of elevated temperature applied at one of the surfaces on the response of a z-pinned joint is conducted using the concept of a double cantilever beam with an “insulated” crack. In addition, it is illustrated that an elevated temperature may actually benefit the integrity of the joint if it causes an increase in the z-pin-composite interfacial strength.
Recommended Citation
L. W. Byrd and V. Birman, "Effect of Temperature on Stresses and Delamination Failure of Z-Pinned Joints," International Journal of Mechanical Sciences, Elsevier, Jan 2006.
The definitive version is available at https://doi.org/10.1016/j.ijmecsci.2006.03.014
Department(s)
Mechanical and Aerospace Engineering
Sponsor(s)
United States. Air Force. Office of Scientific Research
Keywords and Phrases
Composite Joints; Fracture; Z-Pins; Residual stresses; Temperature
International Standard Serial Number (ISSN)
0020-7403
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2006 Elsevier, All rights reserved.
Publication Date
01 Jan 2006
