Interlaminar stresses in corrugated laminates
| Autor: | Paolo Ermanni, Lukas Ruppen, Gerald Kress, Claudia Thurnherr |
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| Rok vydání: | 2016 |
| Předmět: |
Digital image correlation
Materials science business.industry Delamination 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology Curvature Stress (mechanics) 020303 mechanical engineering & transports Amplitude 0203 mechanical engineering Ceramics and Composites Composite material 0210 nano-technology Axial symmetry business Civil and Structural Engineering Plane stress Tensile testing |
| Zdroj: | Composite Structures. 140:296-308 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2015.11.038 |
| Popis: | In axially loaded corrugated laminates consisting of more than one layer interlaminar stresses occur due to the curvature which potentially cause delamination of the laminate. Therefore, it is crucial to know how geometry and lay-up influence the interlaminar stress and hence the risk of delamination. In this paper, a parameter study is presented that studies the influence of corrugation amplitude and different lay-ups on interlaminar stresses. We considered two geometries, one consists of circular sections and the other is a sinusoidal shape. From the parameter study we can derive favorable configurations to minimize normalized interlaminar stresses. A numerical model is used to calculate the stress distribution in the cross-section of the corrugation. It considers a generalized plane strain state and uses a unit-cell approach. The model is validated with experiments in a tensile test using digital image correlation (DIC). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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