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

Isaac M. Daniel*, Sam M. Daniel, Joel S. Fenner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)79-93
Number of pages15
JournalInternational Journal of Solids and Structures
StatePublished - Sep 2018


  • Failure criteria
  • Failure envelopes
  • Mechanical characterization
  • Strain rate effects
  • Yield criteria

ASJC Scopus subject areas

  • Modeling and Simulation
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics


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