高密度聚乙烯管道对接接头断裂参量统计分布  

Statistic distribution of resistance to initiation property of high density polyethylene gas pipe butt-fusion welded joint

作　　者：齐芳娟[1] 霍立兴[2] 张玉凤[2] 荆洪阳[2] 赵海深 

机构地区：[1]石家庄铁道学院材料科学与工程系,石家庄050043 [2]天津大学材料科学与工程学院,天津300072 [3]亚大塑料制品有限公司,河北涿州072761

出　　处：《焊接学报》2006年第3期49-52,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50075063)

摘　　要：以裂纹张开位移(crack open ing d isp lacem ent)特征值参量为基础,对国内燃气工业中应用日益普及的高密度聚乙烯(HDPE)管道热熔对接接头的抗开裂特性参量的分散性及统计分布进行了研究。结果表明,HDPE热熔对接接头在低温下,其抗开裂参量饱和启裂COD值具有一定的分散性。对其进行拟合统计检验结果表明,三参数威布尔分布为其最佳拟合分布。并且,随着温度的降低,抗开裂参量的数据的分散性变小。The statistic distribution of the resistance to initiation property of HDPE(high density polyethylene)pipe butt-fusion welded joint was investigated on the basis of Crack Opening Displacement(COD).The results show that the saturation initial crack COD δ_(is) of HDPE butt-fusion welded joint have the statistic variance inherently.The statistic probabilistic model was set up to fit the distribution function of δ_(is).Performed several statistic tests,the results show that the optimum fitting distribution of δ_(is) weibull distribution with three parameters.The variance of test results decreases with decreasing temperature.

关 键 词：裂纹张开位移 高密度聚乙烯燃气管道 热熔对接接头 三参数威布尔分布 

分 类 号：TQ320.67[化学工程—合成树脂塑料工业]