摘要
对三种不同类型的纤维增强塑料材料的物理性能进行了对比分析,并针对碳纤维增强塑料材料和玻璃纤维增强塑料材料在不同环境下(例如周围环境温度的变化、湿度的不同、化学物质的腐蚀性作用、紫外线光照影响等)的耐久性进行了实验,得到了碳纤维增强塑料材料的耐久性能较好,玻璃纤维增强塑料材料对于潮湿暴露和紫外线照射比较敏感的结论;在此基础上,讨论不同纤维增强塑料材料在短期荷载和长期荷载作用下的力学性能(包括弹性模量、拉伸强度、极限应变、松弛应力损失以及徐变系数随时间变化情况)。结果表明,厂商在生产纤维增强塑料材料时为了保证其拉伸强度、应用安全、防止提前老化,通常采用三倍标准差3σ,将纤维增强塑料材料失效概率降到0. 1%以下,应力松弛损失保持在3%以下,张拉预应力值不能超过材料本身拉伸强度的60%。
The study compared the physical properties of three different types of fiber reinforced plastic materials,and conducted durability experiments for carbon fiber reinforced plastic materials and glass fiber reinforced plastic materials in different environments (such as changes in ambient temperature,humidity, chemical substances and UV-irradiation).The durability of the carbon fiber reinforced plastic material was good,and the glass fiber reinforced plastic material was sensitive to moisture exposure and ultraviolet irradiation.On this basis,this article discussed the mechanical tensile strength ,ultimate strain,relaxation stress loss and creep properties (including elastic modulus, coefficient with time)of different fiber reinforced plastic materials under short-term load and long-term load.The test results show that in order to ensure the tensile strength,application safety and prevent premature aging in the production of fiber reinforced plastic materials,the manufacturer usually uses three standard deviations to reduce the failure probability of fiber reinforced plastic materials to less than 0.1% and maintain the stress relaxation loss below 3%.And the tensile prestress value could not exceed 60% of the tensile strength value of the material itself.
作者
顾俊
GU Jun(Jiangnan Vocational College of Media Arts,Wuxi 214153,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2018年第12期6-10,共5页
China Plastics Industry
关键词
纤维增强塑料
建筑桥梁结构
裂缝修复
Fiber Reinforced Plastic
Building Bridge Structure
Crack Repair
