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01-12-2010 | Issue 12/2010

Metallurgical and Materials Transactions A 12/2010

Larson–Miller Failure Modeling of Aluminum in Fire

Journal:
Metallurgical and Materials Transactions A > Issue 12/2010
Authors:
E. Kandare, S. Feih, B.Y. Lattimer, A.P. Mouritz
Important notes
Manuscript submitted November 16, 2009.

Abstract

This article presents a modeling approach based on the Larson–Miller parameter (LMP) for creep rupture to predict failure of aluminum in fire. The modified Larson–Miller model can predict time-dependent tensile rupture or compressive buckling of aluminum plate under combined loading and one-sided heating by fire. The model applies the LMP to determine the failure time and failure temperature of aluminum exposed to fire. Fire structural tests were performed on an aluminum alloy (5083-H116) subjected to different load levels and heat flux conditions (with maximum temperatures of 473 to 688 K (200 to 415 °C)) to validate the Larson–Miller modeling approach. The tests reveal that the Larson–Miller model can accurately predict tensile and compressive failure of aluminum plates (with and without surface insulation) in fire in terms of critical temperature and time.

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