## Abstract The longโterm viscoelastic behavior of reinforced allโpoly(propylene) composites was studied by flexural creep tests. Both unidirectional and crossโply laminates were prepared from PUREยฎ coextruded tapes by vacuum bag molding in an autoclave. The specimens were subjected to isothermal c
Creep behavior of unidirectional composites
โ Scribed by K. Kondo; T. Kubo; M. Masuyama
- Publisher
- Springer
- Year
- 1994
- Tongue
- English
- Weight
- 584 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0178-7675
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โฆ Synopsis
The creep behavior of the continuous fiber reinforced unidirectional composites due to the viscoelasticity of the resin matrix is investigated assuming that the constituent matrix obeys the nonlinear creep law and the fiber is the linear elastic materials. Utilizing a quasi three-dimensional finite element method, the macroscopic creep behavior of the composites with regular fiber packing is obtained, giving the orthotropic creep law for the composites. Then, the creep of the composites with random fiber packing is estimated applying the random model proposed by Kondo and Saito in which the neat matrix cylinders are embedded in the regular array composites. The theoretical predictions for the creep behavior are compared with the experimental results. 1
๐ SIMILAR VOLUMES
Even at cryogenic temperatures fiber composites with a polymeric matrix exhibit a viscoelastic behavior. Depending on the fiber arrangement and the mode of loading, there are fiber and matrix dominated properties. For dynamic (or cyclic) loading of fiber composites, the time dependence of moduli and