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Development of a Constitutive Model for Impact Limiters

by A. K. Maji,
H. L. Schreyer,
M. Neilsen,



Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond

Abstract:

A constitutive model is being developed for 'impact limiter' materials such as aluminum honeycombs and polyurethane foams. Among other applications, these materials are used to protect the transportation casks for radioactive waste disposal. An extensive experimental program was conducted to obtain material response under various loading paths under static loads. Load-deformation and localization characteristics were recorded to aid the development of the constitutive model. Continuum damage constitutive models were used to predict experimental data. The primary focus is to capture the effect of progressive cell collapse and to be able to eventually predict the orientation and propagation of such a localized feature under a multi-axial state of stress. This paper presents the preliminary results of this endeavor.

Subject Headings: Constitutive relations | Static loads | Synthetic materials | Stress strain relations | Strain | Polyurethane | Load factors

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