Numerical study of defects in glass reinforced composite transducer shells

被引:0
作者
Debus, J.-C. [1 ]
Hamonic, B. [1 ]
机构
[1] IEMN, Lille, France
关键词
Composite materials - Defects - Fatigue of materials - Finite element method - Fracture - Glass fiber reinforced plastics - Mathematical models - Numerical analysis - Shells (structures) - Structural analysis - Vibrations (mechanical);
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学科分类号
摘要
Fatigue in composite shells of flextensional transducers can be investigated experimentally but in service results transposition is uncertain. This study can also be carried out numerically. However, a simple model rarely allows to describe the fracture in fatigue of an existing structure. The approach that is suggested here aims (starting from a modal analysis of a damaged structure in situ and according to results of a numerical computation by finite elements) at identifying the type of flaw in a qualitative and quantitative way. This paper first presents the finite element used to deal with this problem. Second the approach is validated on a shell example. Finally an experiment on a simple G.R.P. plate is used to compare numerical and experimental results to validate the approach.
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页码:347 / 350
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