【摘要】 以光洁表面和带有沟槽形貌特征的Al/CFRP(碳纤维增强复合材料)单搭接头胶结强度为研究对象,建立了相关的数值模拟模型。对比分析了光洁表面与微沟槽表面对胶结强度的影响,且进一步探讨了不同深度微沟槽对胶结强度的影响。数值模拟结果表明:带有微沟槽表面的5052板材与CFRP的胶结强度优于光洁表面与CFRP的胶结强度;增加微沟槽的深度能提高胶结强度,且随着微沟槽深度的增大,胶结强度逐渐增大。最后进行了试验验证,结果与数值模拟结果一致,即随着沟槽深度的增大,胶结接头破坏载荷不断升高,然而随着沟槽深度的进一步增大,破坏载荷增大趋势放缓。更多还原

【Abstract】 A finite element model of adhesive joint of aluminum alloy 5025 sheet surface with or without grooves and Carbon Fiber Reinforced Polymer(CFRP)was built to evaluate the influence of the grooves on adhesive joint intensity.First,the adhesive joint intentions are compared and analyzed on the aluminum alloy with or without grooves and CFRP,and the effect of the groove depth on the adhesive joint intensity was discussed.The simulation results show that the adhesive joint intensity of aluminum alloy with grooves is better than that of aluminum alloy without grooves.Furthermore,the adhesive joint intensity increases with the groove depth.Then,experiments were carried out,and the results are in good accordance with the simulation results,verifying the simulation method.With the increase in the groove depth,the failure load of the adhesive joints grows continuously,however with further increase in the groove depth,the failure load increases slowly.更多还原