中山大学学报自然科学版 ›› 2016, Vol. 55 ›› Issue (6): 103-108.

• 研究论文 • 上一篇    下一篇

高密度聚乙烯单轴拉伸力学性能试验研究

陈自鹏1,2,石少卿1,2,罗伟铭1   

  1. 1. 后勤工程学院军事土木工程系,重庆 401311;
    2. 重庆市地质灾害防治工程技术研究中心,重庆 401311
  • 收稿日期:2016-06-30 出版日期:2016-11-25 发布日期:2016-11-25
  • 通讯作者: 石少卿;E-mail:ssq601@163.com

The mechanism property analysis of the uniaxial tensile experimental about the high density polyethylene

CHEN Zipeng 1,2, SHI Shaoqing 1,2, LUO Weiming 1   

  1. 1. Department of Civil Engineering, Logistical Engineering University, Chongqing 401311, China;
    2. Chongqing Key Laboratory of Geomechanics & Geoenvironmental Protection, Chongqing 401311, China
  • Received:2016-06-30 Online:2016-11-25 Published:2016-11-25

摘要:

随着高密度聚乙烯(HDPE)被广泛应用于化工,建筑,军工等各个领域,高密度聚乙烯的型号,使用环境也越来越多样化。因此,对在不同拉伸速率和拉伸方向下的光面HDPE片材和花纹面HDPE片材进行单轴条带拉伸试验。试验表明:光面横向受拉片材随着拉伸速率的提升,其屈服平台强度也随着提升,在拉伸速率为150 mm/min时,光面横向受拉片材的第二屈服点不明显,材料抗拉性能较好。花纹面片材的最大拉伸强度的率相关性较好,在已有的3组拉伸速率下平均增长5.02%,但花纹面所受最大荷载较光面片材小。花纹面片材较光面片材更易断裂,纵向受拉片材较横向受拉片材更易断裂。结果表明,光面横向受拉片材的抗拉性能较好。

关键词: 条带拉伸试验, 率相关性, 方向相关性, 高密度聚乙烯

Abstract:

Since the high density polyethylene(HDPE) is popularly used in areas such as the chemistry, construction and the military project, the types and the conditions for usage are verified. The uniaxial tensile test on the smooth surface specimens and the pattern surface specimens is performed, with different stretching speed and tensile directions. The experiment shows that the yield platform value of the smooth specimens also increases with the increase of the stretching speed, which is under the transversal tension. When the stretching speed is 150 mm/min, the smooth transversal tensile specimen has inconspicuous second yield point, which means that it has better performance on the tension. The rate dependence of the pattern specimens is more obvious and its value is 5.02% under 3 different stretching speed. However, the load the pattern specimens can undertake is lower contrast with the smooth specimens. It is easier for the pattern specimens to be broken than the smooth specimens, and it is also easier for the longitudinal tensile specimens to be broken than the transversal tensile specimens. Consequently, the smooth transversal tensile specimen has better tensile strength.

Key words: the uniaxial tensile test, the rate dependence, the direction dependence, the high density polyethylene

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