Dual boundary element analysis for fatigue behavior of missile structures |
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| Authors: | Shiang‐Woei Chyuan Jiann‐Hwa Lin Jeng‐Tzong Chen Dauh‐Churn Liu |
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| Affiliation: | 1. Chung‐shan Institute of Science and Technology , Lung‐tan, Taiwan 325, R.O.C.;2. Department of Harbor and River Engineering , Taiwan Ocean University , Keelung, Taiwan 202, R.O.C. |
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| Abstract: | Abstract The fatigue behavior of a crack in a missile structure is studied using the dual boundary integral equations developed by Hong and Chen (1988). This method, which incorporates two independent boundary integral equations, uses the displacement equation to model one of the crack boundaries and the traction equation to the other. A single domain approach can be performed efficiently. The stress intensity factors are calculated and the paths of crack growth are predicted. In order to evaluate the results of dual BEM, four examples with FEM results are provided. Two practical examples, cracks in a V‐band and a solid propellant motor are studied and are compared with experimental data. Good agreement is found. |
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| Keywords: | boundary elements damage tolerance fatigue crack growth fracture mechanics stress intensity factors. |
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