Effects of thickness and fiber volume fraction variations on strain field inhomogeneity |
| |
| Affiliation: | 1. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 bus 2450, Belgium;2. Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106, USA;3. Materials Department, University of California, Santa Barbara, CA 93106, USA;4. School of Engineering, University of Aberdeen, King’s College, Aberdeen AB24 3UE, Scotland, UK;1. Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK;2. COMPACT Composite Impact Engineering LTD, 83 Ducie St, Manchester M1 2JQ, UK;1. Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore;2. Department of Mechanical Engineering, University of Michigan, 2350 Hayward St, Ann Arbor, MI 48109, USA;3. Singapore Institute of Manufacturing Technology, Agency for Science, Technology and Research (A-STAR) Fusionopolis Way, 138634, Singapore |
| |
| Abstract: | In this study, variations in thickness and fiber volume fraction are investigated as causes of elastic strain inhomogeneity in composite laminates under an applied transverse load. Standard carbon/epoxy tensile specimens were fabricated from unidirectional pre-impregnated material using two different manufacturing techniques that produced two different levels of surface roughness. Fiber volume fraction variation was computed by analyzing optical micrographs of the samples. During loading and unloading of the samples two-dimensional surface strain fields were measured on the specimen using digital image correlation. It was shown that in both cases the strain in the specimen is not uniform, as is generally assumed. Using finite element simulations the effects of fiber volume fraction variation and thickness variation were modeled individually and in combination. The simulations agree well with the experimental results and suggest that thickness variations are the dominant mechanisms involved in this elastic strain inhomogeneity. |
| |
| Keywords: | A Polymer–matrix composites (PMCs) B Defects C Finite element analysis (FEA) D Optical microscopy |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
