Strain-Rate-Dependent Failure of a Toughened Matrix Composite

J. D. Schaefer; B. T. Werner; I. M. Daniel

doi:10.1007/s11340-014-9876-0

Strain-Rate-Dependent Failure of a Toughened Matrix Composite

J. D. Schaefer, B. T. Werner, I. M. Daniel

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

The strain-rate-dependent behavior of a toughened matrix composite (IM7/8552) was characterized under quasi-static and dynamic loading conditions. Unidirectional and off-axis composite specimens were tested at strain rates ranging from 10^-4 to 10³ s^-1 using a servo-hydraulic testing machine and split Hopkinson pressure bar apparatus. The nonlinear response and failure were analyzed and evaluated based on classical failure criteria and the Northwestern (NU) failure theory. The predictive NU theory was shown to be in excellent agreement with experimental results and to accurately predict the strain-rate-dependent failure of the composite system based on measured average lamina properties.

Original language	English (US)
Pages (from-to)	1111-1120
Number of pages	10
Journal	Experimental Mechanics
Volume	54
Issue number	6
DOIs	https://doi.org/10.1007/s11340-014-9876-0
State	Published - Jun 2014

Keywords

Composites
Dynamic testing
Failure prediction
Strain rate dependence
Toughened matrix

ASJC Scopus subject areas

Aerospace Engineering
Mechanics of Materials
Mechanical Engineering

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10.1007/s11340-014-9876-0

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title = "Strain-Rate-Dependent Failure of a Toughened Matrix Composite",

abstract = "The strain-rate-dependent behavior of a toughened matrix composite (IM7/8552) was characterized under quasi-static and dynamic loading conditions. Unidirectional and off-axis composite specimens were tested at strain rates ranging from 10-4 to 103 s-1 using a servo-hydraulic testing machine and split Hopkinson pressure bar apparatus. The nonlinear response and failure were analyzed and evaluated based on classical failure criteria and the Northwestern (NU) failure theory. The predictive NU theory was shown to be in excellent agreement with experimental results and to accurately predict the strain-rate-dependent failure of the composite system based on measured average lamina properties.",

keywords = "Composites, Dynamic testing, Failure prediction, Strain rate dependence, Toughened matrix",

author = "Schaefer, {J. D.} and Werner, {B. T.} and Daniel, {I. M.}",

note = "Funding Information: Acknowledgments The work described in this paper was sponsored by the Office of Naval Research (ONR). The authors are grateful to Dr. Y.D.S. Rajapakse of ONR for his encouragement and cooperation.",

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AU - Schaefer, J. D.

AU - Werner, B. T.

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AB - The strain-rate-dependent behavior of a toughened matrix composite (IM7/8552) was characterized under quasi-static and dynamic loading conditions. Unidirectional and off-axis composite specimens were tested at strain rates ranging from 10-4 to 103 s-1 using a servo-hydraulic testing machine and split Hopkinson pressure bar apparatus. The nonlinear response and failure were analyzed and evaluated based on classical failure criteria and the Northwestern (NU) failure theory. The predictive NU theory was shown to be in excellent agreement with experimental results and to accurately predict the strain-rate-dependent failure of the composite system based on measured average lamina properties.

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Strain-Rate-Dependent Failure of a Toughened Matrix Composite

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Keywords

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