Document Type

Article

Source Publication Title

Proceedings of the American Society for Composites; Thirty-fifth Technical Conference

Abstract

The long term behavior of composites have been extensively studied for the last four decades. Given the heterogeneity of these materials, the damage accumulation mechanisms lead to superior fatigue performance of composites compared to metals. However, due to the ‘sudden death’ behavior controlled by defect coupling, the precursor to fracture plane development of these materials, the challenge remains on how to assess the real-time material state and predict when it becomes critical? In the recent past, broadband dielectric spectroscopy (BbDS) has been used successfully to assess the material state and predict the material state change (triggered by defect coupling) for quasi-static loading. In this work, we perform insitu monitoring of material state change for tension-tension fatigue loading (low cycle fatigue) and attempt to capture the material state change for quasi-isotropic laminates. The insitu response can be used to predict the formation of a ‘critical’ material state- the final frontier to predict the durability of composites and discuss the repeatability of the methodology.

Disciplines

Engineering | Materials Science and Engineering

Publication Date

9-17-2020

Language

English

Comments

Institute for Predictive Performance and Methodologies, The University of Texas at Arlington Research Institute, Fort Worth, TX

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