论文2纸浆模塑承载结构单元屈曲临界荷载数值分析1.docVIP

纸浆模塑制品结构单元承载能力与缓冲性能数值分析 *计宏伟1，王和敏2，陈金龙2 (1. 天津商业大学包装工程系，天津，天津 300134；2. 天津大学力学系，天津，天津 300072) 摘 要：纸浆模塑包装制品的承载与缓冲功能是通过制品中各结构单元来实现的，结构单元的形态和几何尺寸直接影响整个制品的承载能力和缓冲性能。应用ANSYS有限元软件分析了纸浆模塑结构单元在压缩载荷作用下的非线性变形特性和屈曲行为，给出了结构单元的临界载荷，由此确定了结构单元的临界承载力。与此同时，计算分析了结构单元厚度变化对承载能力和缓冲性能的影响。结果显示，随着结构单元壁厚的增加其承载能力也随之增加，但缓冲效果变弱，因此在纸浆模塑缓冲结构设计时必须平衡两者，针对不同包装要求调整纸浆模塑厚度，设计出满足不同承载要求且缓冲性能优良的包装结构。 关键词：纸浆模塑；结构单元；压缩屈曲；有限元 中图分类号：TB482.2 文献标识码：A NUMERICAL ANALYSIS FOR LOAD-BEARING CAPACITY AND CUSHIONING PERFORMANCE OF STRUCTURAL UNIT OF MOLDED PULP PRODUCT 收稿日期： 基金项目： 天津市自然科学基金重点项目（No.08JCZDJC16100) 作者简介：计宏伟(1964―)，男，辽宁锦州人，教授，博士，主要从事运输包装方面的研究(E-mail: jhwtj@126.com)； 王和敏(1981―)，男，湖北人，硕士生，主要从事固体力学方面的研究(E-mail: whm805@)； 陈金龙(1966―)，男，吉林人，教授，博士，博导，从事固体力学教学与科研(E-mail: jlchen66@). JI Hong-wei1, WANG He-min2, CHEN Jin-long2 (1. Dept. of Packaging Engineering, Tianjin Commerce University, Tianjin 300134, China; 2. Dept. of Mechanics, Tianjin University, Tianjin 300072, China) Abstract: The overall load-bearing capacity and cushioning function of a molded pulp packaging result from those of structural units. For each structural unit, its geometrical shape and dimensions can be identified to determine the performance of molded pulp product. The commercial code ANSYS was employed in the present study due to its high performance in non-linear analyses. The non-linear buckling behavior of the structural unit can be studied by numerical simulation, resulting in the bucking critical load under compression, to be used to evaluate the load-bearing capacity of the structural unit. In addition to the analyzing on load-bearing capacity, numerical simulations of the structural units are carried out to evaluate the influence of the wall thickness under static compressive loading. The research shows that the wall thickness significantly influences the buckling bearing capacity of the structural unit subjected to axial compression. With the increase of wall thickness, the bearing capacity of the structural unit