Energy absorption of expanded polyurethane under cycling compression and impact

被引：0

作者：

Packaging Engineering Institute, Jinan University, Zhuhai ^{[1
]}

519070, China

不详 ^{[2
]}

519070, China

机构：

[1] Packaging Engineering Institute, Jinan University, Zhuhai

[2] Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, Jinan University, Zhuhai

来源：

J Vib Shock | / 5卷 / 44-48期

关键词：

Cycling test; Energy absorption diagram; Expanded polyurethane; Strain rate; Stress-strain curve;

D O I：

10.13465/j.cnki.jvs.2015.05.008

中图分类号：

学科分类号：

摘要：

Based on quasi-static compression and drop hammer impact tests, the mechanical property and energy absorption of expanded polyurethane (EPU) were analyzed, and the stress-strain curve and energy absorption diagram were obtained at low and intermediate strain rates. The effects of different initial strain rates and of cycling compression and impact tests on cushioning properties of EPU were investigated. The stress and energy absorption of EPU increase obviously when the initial strain rate increases from 2.56×10-3 s-1 (quasi-static) to 4.01×101s-1, 5.08×101s-1 and 5.68×101s-1. Compared with the lowest initial strain rate, the stress increases respectively by 54.34%, 79.35% and 114.49%, and the energy absorption by 18.98%, 30.09% and 65.74% when the strain is 0.4. Five times of cycling quasi-static compression or drop hammer impact tests were carried out on each sample. Compared with the first test, the stress and energy absorption of EPU in the second to fifth tests decline obviously. When the strain is 0.4, the static stress declines respectively by 18.48%, 32.97%, 36.59% and 39.49%, the dynamic stress by 20.81%, 28. 48%, 34.75% and 34.75%, the energy absorption in quasi-static compression by 24.54%, 37.50%, 40.74% and 43.52%, and the energy absorption in drop hammer impact by 15.30%, 24.20%, 30.25% and 30.96%. The effects of strain rate and of cycling compression and impact on cushioning property of EPU are obvious at low and intermediate strain rates. After certain times of cycling quasi-static compression or drop hammer impact, the cushioning properties of EPU turn to remain unchanged. So, cushioning packaging with EPU can be designed according to the data resulted. ©, 2015, Chinese Vibration Engineering Society. All right reserved.

引用

页码：44 / 48

页数：4

共 20 条

[11] Wang Z.W., Li X.F., Effect of strain rate on cushioning properties of molded pulp products, Materials & Design, 57, pp. 598-607, (2014)
[12] Ye C.-X., Wang Z.-W., Energy absorption characteristics of EPE and EVA foam, Packaging Engineering, 33, 1, pp. 40-45, (2012)
[13] Li J., Gao D., Wang Z.-L., Study of the constitutive relation of low density polyethylene foam under compression, Packaging Engineering, 29, 12, (2008)
[14] Rao C.-C., Jiang X.-F., Li J.-Y., Et al., Research on constitutive relation of high-density polyethylene structural foam under tensile, China Plastics, 26, 7, pp. 66-69, (2012)
[15] Xi D.-C., Gao D., The review on constitutive modeling of cushion packaging materials, Packaging Engineering, 32, 1, pp. 1-4, (2011)
[16] Lu Z.-X., Yuan Y.-L., Investigation into the energy absorption and failure characteristics of syntactic foams at high strain rates, Acta Materiae Compositae Sinica, 19, 5, pp. 114-117, (2002)
[17] Lin Y.-L., Lu F.-Y., Wang X.-Y., Et al., Compression behavior experimental study of Low density polyurethane foam, Chinese Journal of High Pressure Physics, 20, 1, pp. 88-92, (2006)
[18] Hu S.-S., Liu J.-F., Wang W., Evaluation of cushioning properties of rigid polyurethane foam plastics, Explosion and Shock Waves, 18, 6, pp. 42-47, (1998)
[19] Tang Y.-K., Gong X.-S., Gu Q.-K., Experimental investigation on vibration performance of polyurethane foam, Journal of Southwest Jiaotong University, 38, 5, pp. 497-500, (2003)
[20] Fan J.-Q., Dong H.-X., Gao Y.-H., Et al., Study on dynamic mechanical properties ofpolyurethane foam materials under high strain rate, Journal of Building Materials, 15, 3, pp. 356-360, (2012)

← 1 2 →