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首页> 外文会议>2015 Sino-Africa international symposium on textiles and apparel >Effect of Thermal Cycling Fatigue on Mechanical Properties of Kenaf Fiber Mat-reinforced Composites
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Effect of Thermal Cycling Fatigue on Mechanical Properties of Kenaf Fiber Mat-reinforced Composites

机译：热循环疲劳对红麻纤维毡增强复合材料力学性能的影响

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摘要

Kanaf fiber mat reinforced composites are usually cured at an elevated temperature and then cooled to ambient conditions.Because of their heterogeneous nature and the very dissimilar expansion-contraction behavior and mechanical properties of the two components thermal stresses are easily generated and can prove troublesome.The effects are exacerbated by thermal cycling, which can occur in a working environment.The aim of the present work is to investigate the effect of thermal fatigue on tensile and bending properties behavior of kenaf fiber mat with unsaturated polyester (UP) resin composites.For this purpose, tensile strength test, low cycle tensile fatigue test and bending tests were performed to the specimens,which have previously been subjected to a certain number of thermal cycles (from + 58 ℃ to-25 ℃).The maximum changes of tensile modulus, flexural modulus were measured and changes of tensile strength, flexural strength were also measured.And different phenomena of low cycle fatigue (LCF) are described graphically after experiencing thermal cycling.Scanning electron microscopy (SEM) is used to monitor the potential changes in the microstructure due to the degradation (if any) caused by the thermal cycles.
机译：卡纳夫纤维毡增强复合材料通常在高温下固化，然后冷却至环境条件，由于它们的非均质性质以及两种组分非常不同的膨胀-收缩行为和机械性能，容易产生热应力并可能带来麻烦。热循环会在工作环境中加剧这种效应。本工作的目的是研究热疲劳对具有不饱和聚酯（UP）树脂复合材料的洋麻纤维毡的拉伸和弯曲性能行为的影响。对样品进行了目的，抗张强度试验，低周拉伸疲劳试验和弯曲试验，这些样品先前已经经历了一定的热循环（从+ 58℃到-25℃）。测量了挠曲模量，还测量了抗张强度，挠曲强度的变化。疲劳（LCF）在经历热循环后以图形方式描述。扫描电子显微镜（SEM）用于监视由于热循环引起的退化（如果有）而导致的微观结构中的电势变化。

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