Effect of crack arrester on fatigue crack growth in foam core sandwich panel under mode I type loading
| Autor: | Yasuo Hirose, Akira Kuraishi, Go Matsubara, Hirokazu Matsuda, Masaki Hojo |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Strain energy release rate
Materials science business.industry Crack tip opening displacement Fracture mechanics Sandwich panel Structural engineering Paris' law Crack growth resistance curve Lightning arrester Crack closure Mechanics of Materials mental disorders Ceramics and Composites Composite material business |
| Zdroj: | Composites Part A: Applied Science and Manufacturing. 56:36-43 |
| ISSN: | 1359-835X |
| DOI: | 10.1016/j.compositesa.2013.09.004 |
| Popis: | Crack arresters were installed to suppress interfacial crack propagation between the skin and core of CFRP/foam core sandwich panels. The effect of the crack arrester on suppressing the propagation of a fatigue crack was investigated under mode I type loading using double cantilever beam specimens. Specimens were made from carbon/epoxy fabric prepreg and a polymethacrylimide foam core. The energy release rate, calculated by FE analysis, showed a considerable reduction at the crack tip as the tip approached the crack arrester. Fatigue crack propagation tests were carried out using sandwich panel specimens containing the crack arrester. The crack propagation rate, da/dN, decreased with decreasing distance from the crack tip to the arrester edge. Thus, the suppression effect of the crack arrester was demonstrated experimentally. This suppression effect correlated strongly with the decrease in the energy release rate due to the crack arrester when the thermal residual stress was taken into account. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect