Residual stresses in unidirectional composites with closely spaced fibers
- Arizona State Univ., Tempe, AZ (United States). Dept. of Mechanical and Aerospace Engineering
Many of the composites utilized in current applications are consolidated at high temperatures. After cooldown to room temperature, the differences in the expansions of the constituent materials may lead to very high residual stresses. Since failure is driven by critical rather than average states, the local stress field becomes essential in evaluating any composite before it is tested under service conditions. The present study describes an analytical solution for the local residual field of a composite with fibers that are closely spaced. The geometry under consideration involves three fibers with their centers located at the vertices of an equilateral triangle. This arrangement corresponds to the generic element of the hexagonal array, an arguably natural fiber distribution. It was found that when the interfaces are perfectly bonded and the three fibers are very close to each other, tensile radial stresses may develop in the constrained matrix region. The analysis can be generalized for any number of fibers at the vertices of a regular polygon.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 177983
- Journal Information:
- Journal of the American Ceramic Society, Vol. 78, Issue 12; Other Information: PBD: Dec 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
The effects of uneven fiber spacing on thermal residual stresses in a unidirectional SCS-6/Ti-15-3 laminate
The effects of uneven fiber spacing on thermal residual stresses in a unidirectional SCS-6Ti-15-3 laminate