A new yield and failure theory for composite materials under static and dynamic loading

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:148

Article

Daniel, Isaac M.¹  Fenner, Joel S.¹ 

[1] Northwestern Univ, Robert McCormick Sch Engn & Appl Sci, 2137 Tech Dr, Evanston, IL 60208 USA

关键词: Mechanical characterization;    Yield criteria;    Failure criteria;    Failure envelopes;    Strain rate effects;   

DOI  :  10.1016/j.ijsolstr.2017.08.036

来源: Elsevier

【 摘 要 】

To facilitate and accelerate the process of introducing, evaluating and adopting new material systems, it is important to develop/establish comprehensive and effective procedures of characterization, modeling and failure prediction of composite structures based on the properties of the constituent materials, e.g., fibers, matrix, and the single ply or lamina. A new yield/failure theory is proposed for predicting lamina yielding and failure under multi-axial states of stress including strain rate effects. It is based on the equivalent stress concept derived from energy principles and is expressed in terms of a single criterion. It is presented in the form of master yield and failure envelopes incorporating strain rate effects. The theory can be further adapted and extended to the prediction of in situ first ply yielding and failure (FPY and FPF) and progressive damage of multi-directional laminates under static and dynamic loadings. The significance of this theory is that it allows for rapid screening of new composite materials without extensive testing and offers easily implemented design tools. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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