中国塑料 ›› 2025, Vol. 39 ›› Issue (10): 85-89.DOI: 10.19491/j.issn.1001-9278.2025.10.014

• 加工与应用 • 上一篇    下一篇

塑料管材冲击性能结果评价分析

李延军1(), 李佟1, 金淼1, 阴铎源1, 刘锐2   

  1. 1.北京建筑材料检验研究院股份有限公司,北京 100041
    2.中国电力工程有限公司,北京 100048
  • 收稿日期:2025-01-07 出版日期:2025-10-26 发布日期:2025-10-21
  • 通讯作者: 李延军,硕士,正高级工程师,研究方向为建筑材料,liyanjun@bmtbj.cn
    E-mail:liyanjun@bmtbj.cn

Evaluation and analysis of impact test results on plastics pipe

LI Yanjun1(), LI Tong1, JIN Miao1, YIN Duoyuan1, LIU Rui2   

  1. 1.Beijing Building Materials Testing Academy Co,Ltd,Beijing 100041,China
    2.China National Electric Engineering Corporation,Beijing 100048,China
  • Received:2025-01-07 Online:2025-10-26 Published:2025-10-21
  • Contact: LI Yanjun E-mail:liyanjun@bmtbj.cn

摘要:

热塑料管材采用真实冲击率作为评价抗冲击性能的指标,需要对整批管材进行冲击,以冲击破坏数除以冲击总数得到结果。在实际工作中,将真实冲击率看作是一个服从二点分布的总体的参数,从总体中抽取样本作区间估计,在样本量较大时可以采用正态分布或泊松分布作近似计算。通过假设检验确定了判定真实冲击率临界值的表和图,便于实际应用,本文也可为同类试验方法提供参考。

关键词: 塑料管材, 耐外冲击性能, 真实冲击率, 参数估计, 假设检验

Abstract:

The true impact rate (TIR), a key metric for assessing the impact resistance of thermoplastic pipes, is defined as the ratio of failures to the total number of impacts in a test batch. This paper proposes a rigorous statistical methodology for TIR analysis by modeling it as a binomial parameter. A large⁃sample theory was employed to construct confidence intervals using both normal and Poisson approximations. Furthermore, hypothesis testing procedures was derived, presenting the results in readily applicable critical value tables and charts. This framework enables rapid and reliable assessment of TIR data, offering a standardized approach that streamlines quality control in industrial settings and provides a valuable reference for impact testing protocols across materials science.

Key words: plastics pipe, resistance to external blow, true impact rate, interval estimation, hypothesis test

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