Study on the tensile strength of flexible composites based on Weibull model
The tensile strength of flexible composites exhibits large scatter mainly as a result of the complexity and interaction of failure modes, and manufacturing induced defects. A practical approach in design for strength of flexible composites which uses as characteristic values for strength, the mean values of experimental results may lead to serious misinterpretations concerning failure onset, and the reliability level is not also taken into account. A probability-based failure-prediction approach is likely to be a more suitable method of overcoming the above mentioned difficulties. In this paper, the experimental data are processed by Weibull theory and Weibull modulus were calculated by 2-parameter and 3-parameter Weibull distribution. Furthermore, the relationship between Weibull modulus and mechanical properties was studied. The results show that the tensile strength of flexible composites is preferred to be expressed with 3-parameter Weibull model. Compared with the average strength, it is more reasonable that the 5-percentile value was used as the design strength as far as reliability level is concerned.
WANG Zexing JIANG Jinhua CHEN Nanliang
College of Textiles, Donghua University, Shanghai 200051, P.R.China Engineering Research Center of Technical Textiles, Ministry of Education, Shanghai 200051, P.R.China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
245-248
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）