摘要
以赫兹接触理论为基础,设计鞋靴用聚氨酯胶粘剂数值模拟基本模型,数值模拟分析搭接接头、对接接头与嵌接接头鞋靴用聚氨酯胶粘剂在不同温度、湿度下的强度变化。研究结果表明:三种接头胶粘剂的剪切强度与粘接强度会随着温度的增加逐渐下降,对接接头的剪切强度与粘接强度受温度影响最小;三种接头胶粘剂的平压强度随着温度的增加均呈现"W"型趋势,温度升高会减少鞋靴含水率,提升纤维中水合氢离子间的作用力,温度越高胶粘剂平压强度越高;湿度不同时,三种接头胶粘剂的粘接强度随着湿度的不断增加逐渐下降,嵌接接头胶粘剂对湿度变化最为敏感;三种接头胶粘剂的平压强度随着湿度的不断增加均逐渐下降,在相对湿度为40%时,胶粘剂平压强度最大,在相对湿度为70%时,胶粘剂平压强度下降幅度最大。综合分析可知,对接接头鞋靴用胶粘剂强度受温度、湿度影响最小。
Based on Hertz Contact Theory,the basic numerical simulation model of polyurethane adhesive for footwear was designed,and the strength changes of polyurethane adhesive for lap joint,butt joint and scarf joint under different temperature and humidity were analyzed by numerical simulation.The research results showed that the shear strength and bonding strength of three kinds of joint adhesive gradually decreased with the increase of temperature,and the shear strength and bonding strength of butt joint were least affected by temperature.The flat compressive strength of three kinds of joint adhesive showed the W-shaped trend with the increase of temperature.The increase of temperature would reduce the moisture content of footwear and enhance the force between hydronium ions in the fiber.The higher the temperature,the higher the flat compressive strength of adhesive.When the humidity was different,the bonding strength of three kinds of joint adhesive gradually decreased with the continuous increase of humidity,and the scarf joint adhesive was the most sensitive to the change of humidity.The flat compressive strength of three kinds of joint adhesive gradually decreased with the increase of humidity.When the relative humidity was 40%,the flat compressive strength of adhesive was the largest,and when the relative humidity was 70%,the flat compressive strength of adhesive decreased the most.Comprehensive analysis showed that the adhesive strength of butt joint for footwear was least affected by temperature and humidity.
作者
张凯
何弘毅
Zhang Kai;He Hongyi(Shangqiu Normal University,Shangqiu 476000,Henan,China;Zhoukou Normal University,Zhoukou 466001,Henan,China)
出处
《中国胶粘剂》
CAS
2021年第7期38-43,共6页
China Adhesives
关键词
不同温度
不同湿度
鞋靴
聚氨酯
胶粘剂
数值模拟
different temperature
different humidity
footwear
polyurethane
adhesive
numerical simulation
