聚氨酯蜂窝纸板动力学性能及其本构模型  

Dynamic Mechanical Properties and Constitutive Model of Honeycomb Paperboard Filled with Polyurethane

作　　者：张勇[1,2] 谢卫红[2] 刘宏伟[2] 张峰[2] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221008 [2]空军勤务学院机场工程与保障系,江苏徐州221000

出　　处：《材料工程》2015年第5期27-32,共6页Journal of Materials Engineering

基　　金：国家自然科学基金面上项目(51478462)

摘　　要：将聚氨酯填充到蜂窝纸板的孔隙中制作了聚氨酯蜂窝纸板复合材料,进而对其进行落锤冲击实验。通过落锤实验得到聚氨酯蜂窝纸板复合材料的应力-应变曲线,对影响其动力学性能的复合材料孔径、厚度、横截面尺寸及冲击速率四个因素进行了分析。结果表明:复合材料的动态屈服强度和动态弹性极限随着蜂窝纸芯的孔径、复合材料厚度和横截面积的增大而减小,随着冲击速率的增大而提高。在实验数据的基础上拟合了复合材料的动态本构方程,并对本构方程与实验数据进行了比较,拟合效果较好。A kind of composite buffering material was made by filling the voids of honeycomb paper- board with polyurethane. Drop tests were performed to evaluate the dynamic mechanical properties of the material. Based on the experimental results, the mechanical behavior of the material was analyzed through influencing factors including honeycomb core diameter, thickness, cross-section area and im- pact velocity. It is shown that the dynamic yield strength and elastic limit increase with the increase of impact velocity, and decrease with the increase of honeycomb core diameter, thickness and cross-sec- tion area. Then the dynamic constitutive model is established. It is proved that the curves of constitu- tive model fit well with those of experimental data.

关 键 词：蜂窝纸板 聚氨酯泡沫 复合材料 落锤实验 动态本构模型 

分 类 号：TB332[一般工业技术—材料科学与工程]