摘要
研究阳光环境对木塑地板材色、抗弯性能和弯曲疲劳性能的影响,并用六元件模型拟合地板的疲劳性能。结果表明:阳光环境中,木塑地板褪色黄变,2～6个月后,抗弯强度下降10.09%～20.27%,抗弯弹性模量下降7.35%～16.38%。2个月后,材料产生的应变为室温时的1.17～1.39倍;由于温湿度、紫外线和光照强度的降低,4个月后,材料产生的应变开始减小;6个月后,材料产生的应变反而比室温时小。木塑地板的疲劳行为与塑料等高分子材料类似,且具有简单热流变材料特性,符合时间—温度—应力等效原理。
An experiment was conducted to study the impacts of the sunshine environment on color,bending properties and flexural fatigue behaviors of wood-plastic floorings.The fatigue behaviors were simulated by a six-parameter model.Results showed that the wood-plastic floorings turned yellow,and the modulus of rupture（MOR） reduced by 10.09%-20.27% and the modulus of elastic（MOE） reduced by 7.35%-16.38% 2-6 months after the wood-plastic floorings were exposed to the sunshine environment.The strain of the wood-plastic floorings under the sunshine environment after 2 months was 1.17-1.39 times as much as it was at room temperature.The strain decreased after 4 months due to the decrease in temperature,humidity and ultraviolet intensity,and it was even smaller after 6 months than that at the room temperature.The fatigue behaviors of the wood-plastic floorings are similar to those of plastic and other polymer materials,and they have simple thermal rheological properties and accord with the time-temperature-stress equivalence principle.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2011年第2期43-44,56,共3页
Journal of Northeast Forestry University
基金
国家自然科学基金项目(30871968)
江苏省科技成果转化专项资金项目(20079663-T-432)
关键词
木塑地板
阳光环境
材色
抗弯性能
疲劳
六元件模型
Wood-plastic floorings
Sunshine environment
Wood color
Bending properties
Fatigue
Six-parameter model
