A Cohesive Zone Approach for Fatigue-Driven Delamination Analysis in Composite Materials
| Autor: | Mohammad Mashayekhi, Ahmad Amiri-Rad |
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| Rok vydání: | 2016 |
| Předmět: |
Strain energy release rate
Materials science business.industry Delamination Measure (physics) Fracture mechanics 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology Cohesive zone model 020303 mechanical engineering & transports 0203 mechanical engineering Path (graph theory) Ceramics and Composites Laminated composites Growth rate Composite material 0210 nano-technology business |
| Zdroj: | Applied Composite Materials. 24:751-769 |
| ISSN: | 1573-4897 0929-189X |
| DOI: | 10.1007/s10443-016-9543-y |
| Popis: | A new model for prediction of fatigue-driven delamination in laminated composites is proposed using cohesive interface elements. The presented model provides a link between cohesive elements damage evolution rate and crack growth rate of Paris law. This is beneficial since no additional material parameters are required and the well-known Paris law constants are used. The link between the cohesive zone method and fracture mechanics is achieved without use of effective length which has led to more accurate results. The problem of unknown failure path in calculation of the energy release rate is solved by imposing a condition on the damage model which leads to completely vertical failure path. A global measure of energy release rate is used for the whole cohesive zone which is computationally more efficient compared to previous similar models. The performance of the proposed model is investigated by simulation of well-known delamination tests and comparison against experimental data of the literature. |
| Databáze: | OpenAIRE |
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