基于红外热成像的印刷橡皮布应变测试  

Strain Test of Printing Blanket Based on the Infrared Thermograph

作　　者：贾志慧[1] 武淑琴[1] 王仪明[1] 乔锌[1] 田贝 王世辉[1] 

机构地区：[1]北京印刷学院数字化印刷装备北京市重点实验室,北京102600

出　　处：《包装工程》2017年第1期67-71,共5页Packaging Engineering

基　　金：北京市教委科技计划重点项目暨北京市自然科学基金重点项目B类(KZ201510015016);绿色印刷与出版技术协同创新中心项目;北京印刷学院科技类项目校级重点研究项目(Ea201504)

摘　　要：目的采用红外热成像系统对压印接触区域橡皮布的动态应变进行测试。方法建立压印接触区域几何模型,结合热弹性效应与热辐射理论分析温度与应变之间的函数关系,并采用红外热像系统测得压印接触区域橡皮布的温度分布情况,最后通过有限元仿真得到橡皮布压痕处的应变云图。结果沿轴线方向,压印接触区域橡皮布温度、应变均呈不均匀分布,轴端温度高于中间区域温度;轴端应力集中,节点位移大,变形量大,中间区域节点位移小,变形量小,中间区域应变量低于轴端区域应变量。结论采用红外热成像技术测试印刷过程中橡皮布动态应变的方法是可行的。The work aims to test the dynamic strain of printing blanket at the impression contact region by the infrared thermal imaging system. The geometric model of the impression contact region was built. Combined with thermos-elastic effect and thermal radiation theory, the function relationship between temperature and strain was analyzed. The temperature distribution of blanket at the impression contact region was obtained with the infrared thermal imaging system. Finally, through the finite element simulation, the strain cloud at the blanket impression region was obtained. Along the axial direction, the blanket temperature and strain at the impression contact region were unevenly distributed. The temperature at axis end was higher than that in the middle region. The strain at axis end was intensive. If the nodal displacement was large, the deformation would be large; for the middle region, such case would be just the opposite. The dependant variables of the middle region were lower than those at axis end. The infrared thermal imaging technology used to test the blanket dynamic strain in the printing process is feasible.

关 键 词：红外热成像 印刷橡皮布 有限元 动态应变 

分 类 号：TS825[轻工技术与工程]