摘要
为验证不同胶层厚度对硬质聚氯乙烯(PVC)板材单搭接接头强度的影响,对不同胶层厚度的单搭接板材件进行拉伸-剪切载荷试验,确认胶层厚度会影响搭接接头的粘接效果,且胶层厚度由0.2 mm增加到2 mm时,搭接件能承受的最大应力由3.59 MPa减小至2.51 MPa;通过有限元仿真得出,当胶层的厚度由0.2 mm增加到2 mm时,搭接件能承受的最大应力由3.32 MPa减小到2.59 MPa;实验与仿真均得出了随着胶层厚度增加,搭接强度变弱的结果。对不同胶层厚度的搭接板材进行仿真,得出最大应力均出现在胶层的边缘位置,因此胶层边缘位置容易先发生破坏;与无胶瘤时相比,胶瘤的存在能减少胶层边缘处的应力集中现象。与无胶瘤的搭接板材件相比,胶瘤存在时的搭接板材件强度提升了20%,胶瘤的存在显著增加了搭接的强度性能。仿真结果与实验结果相比较,误差在10%内,仿真模型有较好的准确度。
In order to verify the effects of different thickness on the strength of single lap joint of rigid polyvinyl chloride （PVC） sheet, the tensile and shear load test of single lap plate with different thickness of the adhesive layer was carried out. Experiments showed that the thickness of the adhesive layer would affect the bonding effect of the lap joint, and the thickness of the adhesive layer increased from 0.2 mm to 2 mm, the maximum stress that the joint could withstand was reduced from 3.59 MPa to 2.51 MPa. Through the finite element simulation, when the thickness of the adhesive layer increased from 0. 2 mm to 2 mm, the maximum stress that the joint could bear was reduced from 3.32 MPa to 2.59 MPa. Experiments and simulations showed the result that the overlap strength became weaker as the thickness of the adhesive layer increased. Simulation results showed that the maximum stress appeared at the edge of the adhesive layer, so the edge position of the adhesive layer was easy to be destroyed first. The presence of the tumor could reduce the stress concentration at the edge of the adhesive layer. Compared with the non-micrometer lap plate, the strength of the lap plate increased by 20% when the tumor was present, and the presence of the tumor significantly increased the strength properties of lap. Compared with the simulation results and the experimental results ,the error value was within 10% , the simulation model had good accuracy.
作者
邢攸冬
马孝松
XING Youdong;MA Xiaosong(College of Meehanical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China)
出处
《塑料》
CAS
CSCD
北大核心
2018年第3期80-83,87,共5页
Plastics
基金
国家级星火计划项目(2015GA790015)
关键词
钛白粉
母粒
PET
功能纤维
颜色
polyvinyl chloride
lap strength
stress analysis
adhesive thickness
tumor
