| Autor: |
Basavaraju B. Raju, Feridun Delale, Ercan Sevkat, Benjamin Liaw |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Composites Part A: Applied Science and Manufacturing. 40:1090-1110 |
| ISSN: |
1359-835X |
| DOI: |
10.1016/j.compositesa.2009.04.028 |
| Popis: |
The progressive damage behaviors of hybrid woven composite panels (101.6 mm × 101.6 mm) impacted by drop-weights at four different velocities were studied by a combined experimental and 3-D dynamic nonlinear finite element approach. The specimens tested were made of plain-weave hybrid S2 glass-IM7 graphite fibers/toughened epoxy (cured at 177 °C). The composite panels were damaged using a pressure-assisted Instron-Dynatup 8520 instrumented drop-weight impact tester. During these low-velocity simpact tests, the time-histories of impact-induced dynamic strains and impact forces were recorded. The damaged specimens were inspected visually and using ultrasonic C-Scan methods. The commercially available 3-D dynamic nonlinear finite element (FE) software, LS-DYNA, incorporated with a proposed user-defined damage-induced nonlinear orthotropic model, was then used to simulate the experimental results of drop-weight tests. Good agreement between experimental and FE results has been achieved when comparing dynamic force, strain histories and damage patterns from experimental measurements and FE simulations. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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