Scale Effect of the Tensile Strength of Aligned-Flax-Fiber Reinforced Composite
Application of plant-derived natural fibers as the reinforcement of polymer-matrix composites is driven by economic and environmental reasons.In order to fully exploit the reinforcing effect of the fibers,they have to be aligned in the composite material.When using such UD composites in load-bearing applications,the dependence of strength on the material volume subjected to loading,i.e.the scale effect of strength,should be taken into account in design.UD-reinforced flax fiber/epoxy matrix composites,produced from prepregs,were tested in tension in fiber direction in order to elucidate the scale effect of the tensile strength.The strength distribution at a fixed specimen size and the dependence of the mean strength on the size were shown to agree reasonably well with the Weibull strength statistics,corroborating the previous results for flax-fabric-reinforced composites.A probabilistic model of the strength in tension along the reinforcement direction,using fiber strength distribution,interfacial shear strength and morphology parameters,was applied to theoretically evaluate the magnitude of scale effect.
flax fibers polymer composites strength Weibull distribution
Jānis Andersons Edgars Spārni(n)(s)
Institute of Polymer Mechanics,University of Latvia,Riga LV-1006,Latvia
国际会议
北京
英文
1-7
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）