摘要
为了描述纤维强度与长度的关系,采用改进的Weibull统计方法对不同长度纤维的强度数据进行了处理。该方法有效地利用实验数据,将不同标距下的实验结果统一处理,并采用迭代步骤求取Weibull参数。由于将长度和拉应力作为统计参数,得到的纤维断裂失效函数综合反映了纤维长度和拉伸应力对失效概率的影响,更好地描述了强度与长度的分散关系。通过对芳纶APMOC和PBO的单丝拉伸实验验证了改进统计方法的优越性。
In order to describe the relationship between fiber＇ s strength and length, a modified weibull statistical method was used to handle the strength data of different length. This method made use of the experimental results of dif- ferent gauge length effectively and uniformly. The weibull parameters were obtained by iterative step. Because it took length and tensile stress as statistical parameter, the breakage failure function attained reflected the effect of the length and tensile stress on fiber＇s failure probability comprehensively and characterized the dispersal relationship between fiber strength and length preferably. The APMOC and PBO＇ s monofilament test verified the advantage of the modification.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2009年第4期14-17,共4页
Aerospace Materials & Technology
基金
"十一五"预研项目(51328040106)
