圆柱形塑膜空气垫的本构关系及缓冲特性分析

Constitutive Relationship and Cushioning Properties of Cylindrical Air Cushion Mats

基于材料力学和物理学基本理论推导并分析了圆柱形空气垫缓冲包装材料的本构关系和弹性比能表达式,并在此基础上分析材料比能的各影响因素。试验结果表明:在径向受载条件下,材料的应力-应变曲线表现出典型的指数型非线性特征,弹性模量随空气垫内冲气压力的增加而升高,但其单元横截面直径对其影响很小;随着充气压力的增加,材料的弹性比能在大应变条件下迅速降低,而在低应变条件下表现并不明显。

Constitutive relationships and elastic specific energy of cylindrical air cushion mats were derived and analyzed on the base of mechanical and physical theories. The investigation of their influencing factors was also carried out. The results show that： the stress-strain curve is observed as an exponentially under radial load and the elastic specific energy increase with the climbing inner pressure, but is affected little by the section area. the elastic specific energy of the material decreases dramatically with the upswing of the inner pressure, but exhibits unobvious at low strain.