Mechanical Properties and Constitutive Model of Aluminum Powder/Rubber Composites

doi:10.3969/j.issn.1000-1093.2018.06.020

Abstract

Abstract: The mechanical properties and constitutive model of aluminum powder/rubber composites are studied. Quasi-static and dynamic compression tests of aluminum powder/rubber composites were carried out using WGD-1 universal testing machine and split Hopkinson pressure bar, and the stress-strain curve of test samples in the range of 1 400 s^-1-2 800 s^-1 strain rate in the quasi-static compression test are obtained. A rate-dependent constitutive model which can describe the one-dimensional dynamic and static compression behaviors of the test samples is established，and the distribution of aluminum particles in the rubber matrix is observed by scanning electron microscopy.The test results show that the test samples have different hardening modes under quasi-static loading. The aluminum powder particles of composites containing 60 wt% Al are crushed during the later stage of compression, and the test samples are eventually crushed. Under dynamic loading,the test samples show obvious strain-rate effects, and the flow stress is significantly increased under the quasi-static compression, especially for compo-sites containing 60 wt% Al. Key

Key words: compositematerial, mechanicalproperty, constitutivemodel, compressiontest, electronmicroscope

CLC Number:

O347.3

LI Jun-bao, LI Wei-bing, CHENG Wei, WANG Xiao-ming, LI Wen-bin, HONG Xiao-wen. Mechanical Properties and Constitutive Model of Aluminum Powder/Rubber Composites[J]. Acta Armamentarii, 2018, 39(6): 1186-1194.

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第39卷第6期
2018 年6月兵工学报ACTA
ARMAMENTARIIVol.39No.6Jun.2018

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