粘接剂对三明治结构自冲铆接头力学性能的影响
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摘要
为探究粘接剂对三明治结构自冲铆接头力学性能的影响,制备了三明治结构的自冲铆接头和粘-铆复合接头,通过拉伸-剪切试验研究接头的静失效载荷、失效位移、抗剪刚度及能量吸收能力,分析接头的失效形式及其宏观失效机理,运用MATLAB对接头的静失效载荷和失效位移进行分析。结果表明:泡沫镍夹层可增大三明治结构自冲铆接头的钉脚张开度;粘接剂减小了粘-铆复合三明治结构接头的残余底厚量和钉角张开度,但使接头的抗剪刚度和静失效载荷分别提升了35.5%和30.8%;粘-铆复合三明治接头的失效形式为下板铆接区域板料粘附于铆钉腔内,并随铆钉脱离下板;同时,粘接界面上的次位键断裂。
To investigate the effect of adhesive on mechanical properties of self-piercing riveted( SPR) sandwich structure joint,the sandwich structure SPR joints and bonded-SPR hybrid joints were fabricated. The tensile-shear tests were carried out to study the static failure loads,failure displacement,shear stiffness and energy absorption properties of the joints,the failure modes as well as the macroscopic failure mechanism about the joints were analyzed. Moreover,the static failure loads and failure displacements of joints were researched by MATLAB. The results indicate that it is beneficial to increase rivet flaring of the joints by using nickel foam interlayer,the residual bottom thickness and rivet flaring of the joints decrease for the use of adhesive,but the shear stiffness and static failure loads of joints increase by35. 5% and 30. 8% respectively. The failure mode of bonded-SPR hybrid sandwich structure joint is that the sheet in lower plate riveted area adhering to the rivet cavity and being pulled out from the lower sheet with the rivet,meanwhile,the secondary bonds of interfacial bond are broken.
To investigate the effect of adhesive on mechanical properties of self-piercing riveted( SPR) sandwich structure joint,the sandwich structure SPR joints and bonded-SPR hybrid joints were fabricated. The tensile-shear tests were carried out to study the static failure loads,failure displacement,shear stiffness and energy absorption properties of the joints,the failure modes as well as the macroscopic failure mechanism about the joints were analyzed. Moreover,the static failure loads and failure displacements of joints were researched by MATLAB. The results indicate that it is beneficial to increase rivet flaring of the joints by using nickel foam interlayer,the residual bottom thickness and rivet flaring of the joints decrease for the use of adhesive,but the shear stiffness and static failure loads of joints increase by35. 5% and 30. 8% respectively. The failure mode of bonded-SPR hybrid sandwich structure joint is that the sheet in lower plate riveted area adhering to the rivet cavity and being pulled out from the lower sheet with the rivet,meanwhile,the secondary bonds of interfacial bond are broken.
引文
[1]李龙.车身单搭接粘接接头静强度性能试验及强度预测方法的研究[D].长春:吉林大学,2011.LI Long.Study on static strength test and strength prediction method of single lap joint of automobile body[D].Changchun:Jilin University,2011.
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[8]PETRIE E M.Handbook of adhesives and sealants[M].New York:Mc Graw-Hill handbooks,2011.
[9]SAMPE,SORNIOTTI A,CROCOMBE A.Modelling chassis flexibility in vehicle dynamics simulation[J].University of Surrey,2011,9(2):630-633.
[10]LI D,HAN L,THORNTON M,et al.The influence of fatigue on the stiffness and remaining static strength of self-piercing riveted aluminium joints[J].Materials&Design(1980-2015),2014,54(2):301-314.
[11]孙江晖,龙燕.计量测试中异常数据剔除的措施[J].电子技术与软件工程,2017,(21):163.SUN Jianghui,LONG Yan.Measure of abnormal data removal in measurement test[J].Electronic Technology and Software Engineering,2017,(21):163.
[12]徐喻琼.胶瘤在胶接结构中应力分布的作用[J].粘接,2016,37(6):67-70.XU Yuqiong.The role of spew-fillets in stress distribution in adhesively bonded structures[J].Bonding,2016,37(6):67-70.
[13]兰立文.粘接作用的原理[J].粘接,1982,3(2):4-11.LAN Liwen.The principle of adhesive action[J].Bonding,1982,3(2):4-11.
[2]WAGNER J,WILHELM M,BAIER H,et al.Experimental analysis of damage propagation in riveted CFRP-steel structures by thermal loads[J].The International Journal of Advanced Manufacturing Technology,2014,75(5):1-11.
[3]AFZALI M,LEFEBVRE F,GAY A,et al.Fatigue of aluminum/glass fiber reinforced polymer composite assembly joined by self-piercing riveting[J].Procedia Engineering,2015,133:501-507.
[4]VANEREK J,BENESOVA A,ROVNANIK P,et al.Evaluation of FRP/wood adhesively bonded epoxy joints on environmental exposures[J].Journal of Adhesion Science and Technology,2014,28(14-15):1405-1417.
[5]KATSIROPOULOS C V,CHAMDS A N,TESRPES K J,et al.Fracture tonghness and shear behavior of composite bonded joint based on a novel aerospace adhesive[J].Composites Part B:Engineering,2012,43(2):240-248.
[6]CUI H.Simulation of ductile adhesive failure with experimentally determined cohesive law[J].Composites Part B Engineering,2016,92:193-201.
[7]何晓聪,何家宁,柯建宏,等.自冲铆接头的质量评价及强度可靠性预测[J].湖南大学学报,2010,37(12):1-4.HE Xiaocong,HE Jianing,KE Jianhong,et al.Quality evaluation and strength reliability prediction of self piercing riveting[J].Journal of Hunan University,2010,37(12):1-4.
[8]PETRIE E M.Handbook of adhesives and sealants[M].New York:Mc Graw-Hill handbooks,2011.
[9]SAMPE,SORNIOTTI A,CROCOMBE A.Modelling chassis flexibility in vehicle dynamics simulation[J].University of Surrey,2011,9(2):630-633.
[10]LI D,HAN L,THORNTON M,et al.The influence of fatigue on the stiffness and remaining static strength of self-piercing riveted aluminium joints[J].Materials&Design(1980-2015),2014,54(2):301-314.
[11]孙江晖,龙燕.计量测试中异常数据剔除的措施[J].电子技术与软件工程,2017,(21):163.SUN Jianghui,LONG Yan.Measure of abnormal data removal in measurement test[J].Electronic Technology and Software Engineering,2017,(21):163.
[12]徐喻琼.胶瘤在胶接结构中应力分布的作用[J].粘接,2016,37(6):67-70.XU Yuqiong.The role of spew-fillets in stress distribution in adhesively bonded structures[J].Bonding,2016,37(6):67-70.
[13]兰立文.粘接作用的原理[J].粘接,1982,3(2):4-11.LAN Liwen.The principle of adhesive action[J].Bonding,1982,3(2):4-11.