ABSTRACT

The effect of low-velocity impact on the strength durability of adhesively bonded joints in hygrothermal environment was investigated in this study. Four different impact energies were applied during the low-velocity impact process, and the impacted joints were then subjected to hygrothermal exposure. The impact characteristics, residual strength, adhesive characteristics, and failure modes of tested samples were analyzed. The results indicated that the bonding strength and environmental durability of joints were greatly affected by the impact, initial damages caused by the impact decreased the joint strength and accelerated the moisture penetration in the hygrothermal exposure. The strength of the unimpacted joint was reduced by 5.51% after exposure, while the strengths of the impacted joints were reduced by 6.81, 7.69, 10.04% and 12.5%, respectively, for impact energies of 4 J, 8 J, 12 J and 16 J.

摘要

在湿热环境下，研究了低速冲击对胶接接头强度耐久性的影响。在低速冲击过程中施加了四种不同的冲击能量，然后对受冲击的接头进行湿热暴露。分析了试样的冲击特性，残余强度，粘合特性和破坏模式。结果表明，冲击对接头的结合强度和环境耐久性的影响很大，冲击引起的初始损伤降低了接头强度，并加速了湿热暴露中的水分渗透。暴露后未受影响的关节强度降低了5.51％，而受影响的关节强度降低了6.81、7.69、10.04％和12.5％，