The mechanism of rate-dependent off-axis compression of a low fibre volume fraction thermoplastic matrix composite
| Autor: | C. Paul Buckley, Ambrose I. Akpoyomare, Michael Okereke |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Polypropylene
Materials science Yield (engineering) Strain (chemistry) Composite number 02 engineering and technology 021001 nanoscience & nanotechnology Compression (physics) Stress (mechanics) chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry TA Volume fraction Ceramics and Composites Fracture (geology) Composite material 0210 nano-technology Civil and Structural Engineering |
| ISSN: | 0263-8223 |
| Popis: | This paper reports on the mechanism of rate-dependent off-axis compression of a unique unidirectional composite with unusually high matrix volume fraction of 65%. The test material is an E-glass fibre reinforced polypropylene composite and was subjected to quasi-static, medium and high strain rates (with strain rates from 10-3 s−1 to 103 s−1). This paper has shown experimental evidence of significant rate-dependence of yielding, strain softening and fracture strain of the test composite. Also, the study reports on the effect of strain rates on evolution of different failure modes of the composite. The observed rate-dependence was shown to result from the influence of the pure matrix on the constitutive behaviour of the composite. The work has used a two-process Ree-Eyring yield model of the matrix to demonstrate the origin of the observed rate-dependent yielding of the composite. The data derived in this study will be significant for further micro-mechanical modelling of finite deforming composites used in especially damage tolerant applications. Composite design engineers and stress analysis experts should benefit also from the findings in this work. |
| Databáze: | OpenAIRE |
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