CAJ | 학술논문

采用一种新的塑性成形连接方法---压印连接方法来实现铜、铝合金板的连接，通过拉剪实验研究了连接接头的力学性能，并分析了铜、铝合金板的排列顺序对接头拉剪载荷的影响。实验结果表明，对于铜、铝复合接头，铜板在上时接头具有较高的拉剪载荷(3 kN)，是铝板在上时拉剪载荷的4.6倍。根据接头失效形式对复合接头进行优化后发现：下层铝板的厚度增大时，接头的拉剪强度略有增大，拉剪过程中的能量吸收明显增大；提高下板材料强度时，接头的拉剪载荷明显增大；铜板作为上板进行压印连接时，失效形式为颈部断裂失效，且接头的拉剪强度较大。
채용일충신적소성성형련접방법---압인련접방법래실현동、려합금판적련접，통과랍전실험연구료련접접두적역학성능，병분석료동、려합금판적배렬순서대접두랍전재하적영향。실험결과표명，대우동、려복합접두，동판재상시접두구유교고적랍전재하(3 kN)，시려판재상시랍전재하적4.6배。근거접두실효형식대복합접두진행우화후발현：하층려판적후도증대시，접두적랍전강도략유증대，랍전과정중적능량흡수명현증대；제고하판재료강도시，접두적랍전재하명현증대；동판작위상판진행압인련접시，실효형식위경부단렬실효，차접두적랍전강도교대。
Clinch was adopted to join Cu and Al alloy sheets.Mechanical performance of the joints was studied based on the lap-shear tests,and the effects of sequence of sheets on the lap-shear load of clinched joint were analyzed at the same time.It can be seen from the experimental results that the clinched joints present higher lap-shear load when the upper sheet is Cu alloy rather than Al alloy. The lap-shear load is about 3 kN,which is 4.6 times of the other one.The optimization for composite joints based on the joint failure modes was carried out.Results show that when the lower sheet thick-ness increases,the energy absorption increases obviously but the lap-shear load slightly.If the lower sheet is displaced by a sheet with higher material strength,lap-shear load of joints increases distinct-l y . A conclusion can be drawn from the joint failure modes that a high joint lap-shear load corresponds to the neck fracture mode.