대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제24권1호
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  • Pages.259-268
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  • 2000
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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불확실한 물성치를 갖는 복합재료 적층 평판의 파괴 예측

Prediction of the Onset of Failures in Composite Laminated Plates with Uncertain Material Properties

  • 발행 : 2000.01.01
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초록

Because of their superior mechanical properties to isotropic materials, composite laminated plates are used for many structural applications that require high stiffness-to-weight and strength-to-weight ratios. Composite materials are always subject to a certain amount of scatter in their elastic moduli, but most analyses and designs with the materials are usually conducted by assuming that the material properties are fixed and have no uncertainties. In this paper, a convex modeling approach is introduced to take account of such uncertainties in elastic moduli. It is used with the finite element method to predict the onset of failures in composite laminated plates subject to in-plane loading. Numerical results show that failures begin at the smaller load when the uncertainties of elastic moduli considered and therefore, such uncertainties should be considered at the design stage for the safety and reliability of the structures.

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참고문헌

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