| Autor: |
Zhenhui Sun, Cheng Li, Ying Tie |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Materials & Design, Vol 202, Iss , Pp 109540- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
0264-1275 |
| DOI: |
10.1016/j.matdes.2021.109540 |
| Popis: |
In this study, the impact response, damage accumulation, interlaminar and intralaminar energy dissipation distributions of patch-repaired carbon fiber reinforced polymer (CFRP) laminates under repeated impacts were studied by combining experimental and numerical methods. A three-dimensional finite element model (FEM) based on continuum damage mechanics (CDM) and cohesive zone model (CZM) was performed using ABAQUS/Explicit to simulate the impact experiments (at impact energy of 10 J ~ 20 J). The influence of impact energy (5 J ~ 15 J) on damage accumulation, interlaminar and intralaminar energy dissipation was explored by numerical calculations. It was found that the sudden drop of the force-time curve was an important signal of serious internal damage of the patch; at impact energy of 5 J ~ 12.5 J, the impact parameters such as impact time, peak force and maximum deflection increased with the increase of impact times; at impact energy of 5 J ~ 12.5 J, the delamination damage after the first impact and the corresponding interlaminar energy dissipation increased slightly with the increase of impact times; the delamination damage can be used as an important factor to reflect the damage accumulation degree of patch-repaired laminates under repeated impacts. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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