Experimental Study on Dynamic Compressive Mechanical Properties and Constitutive Model of Steel/polyurethane Sandwich structure

SHEN Chao-ming YE Ren-chuan TIAN A-li

Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (10) : 115-119.

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PDF(1539 KB)
Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (10) : 115-119.

Experimental Study on Dynamic Compressive Mechanical Properties and Constitutive Model of Steel/polyurethane Sandwich structure

  • SHEN Chao-ming  YE Ren-chuan  TIAN A-li
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Abstract

Dynamic compressive constitutive model of steel/polyurethane sandwich structure with different thickness ratio under high strain rate is proposed based on the split Hopkinson pressure bar (SHPB) experimental tests. As the experimental results show, steel/polyurethane sandwich structure is very sensitive to strain rate. The yield strength of steel/polyurethane sandwich structure is increased as the strain rates are raised and the growth rate is greater than the increase speed of strain rate. Based on Johnson-Cook constitutive model, dynamic constitutive model for steel/polyurethane sandwich structure with different thickness ratio was proposed. The parameters in constitutive model are determined by analysis of experimental tests. It can be conclude that the dynamic compressive constitutive model presented in this paper is effective and accurate to descript the stress-strain curve of steel/polyurethane sandwich structure.

Key words

constitutive model / dynamic compressive mechanics properties / sandwich structure / SHPB / thickness ratio

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SHEN Chao-ming YE Ren-chuan TIAN A-li. Experimental Study on Dynamic Compressive Mechanical Properties and Constitutive Model of Steel/polyurethane Sandwich structure[J]. Journal of Vibration and Shock, 2016, 35(10): 115-119

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