A new yield and failure theory for composite materials under static and dynamic loading. (September 2018)

• Record Type: Journal Article
• Authors: Daniel, Isaac M.; Daniel, Sam M.; Fenner, Joel S.
• Is Part Of: International journal of solids and structures. Volume 148/149(2018)
• Page Start: 79
• Page End: 93
• Publication Date: 2018-09
• Subjects: Mechanical characterization -- Yield criteria -- Failure criteria -- Failure envelopes -- Strain rate effects; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2017.08.036
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: 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.