双锥构型三维点阵材料压缩特性

doi:10.12066/j.issn.1007-2861.1983

Abstract

Abstract:

The compression properties of the dual-pyramid lattice materials consisting of resin hollow tubes were studied and compared with those of the homogeneous materials. Specimens of lattice materials and homogeneous materials were fabricated using multi nozzle plastic additive manufacturing technology. The compression properties of homogeneous materials and lattice materials of two cellular sizes were tested. The compression stress-strain curves of different strain rates were obtained. The effects of geometry size of unit cell and strain rate were researched. The equations for predicting the stress-strain relations before material failures were obtained by fitting experimental data. The stress prediction results agree with the experimental results. The research results show that the cellular size significantly affects the compressive properties of lattice materials. The yield strain changed little under different strain rates, and the yield strength difference is relatively large. The yield strain of the presented lattice materials is greater than that of the homogeneous resin materials, and the yield strength is not greater than that of the homogeneous resin materials.

Key words: lattice material, dual-pyramid, compression properties, strain rate, additive manufacture

CLC Number:

Li DING, Xiaoying MAN, Weihua XIE, Yumin ZHANG, Hailin CAO, Xiaolin LIANG. Compression properties of 3D dual-pyramid lattice materials[J]. Journal of Shanghai University（Natural Science Edition）, 2020, 26(1): 76-84.

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Compression properties of 3D dual-pyramid lattice materials

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