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提出了基于胶粘剂粘接平面法向正应力(σ)和切向剪应力(τ)的粘接强度校核方法,针对高速动车组车窗粘接结构在实际使用过程中往往承受拉伸力和剪切力的共同作用,引入了嵌接接头,并分别设计了粘接角度为0°、15°、30°、45°、60°、75°、90°的7组试样进行试验。研究结果表明:通过7组不同正剪比时的胶粘剂破坏应力,可拟合出一条胶粘剂破坏应力的包络线,然后根据该包络线总结出一种高速动车组车窗粘接强度的校核方法;该校核方法在预测粘接结构所能承受的最大安全载荷方面具有较好的可靠性、可行性和指导作用,能有效保证安全、可靠地使用车窗粘接结构。
The method of checking the bond strength based on the normal stress (σ) and the tangential shear stress (τ) based on the adhesive bonding plane method is proposed. In view of the fact that the bonding structure of the window of a high speed EMU often suffers tensile force Shearing force was introduced into the joint. Seven groups of specimens with bonding angles of 0 °, 15 °, 30 °, 45 °, 60 °, 75 ° and 90 ° were designed and tested respectively. The results show that the stress-strain curve of adhesive can be fitted through the stress-strain curves of adhesive under different shear-to-shear ratios of 7 groups. Then, a high-speed EMU car window adhesion strength formula is derived from this envelope Nuclear method. The verification method has good reliability, feasibility and guidance in predicting the maximum safety load that the bonding structure can bear, and can effectively ensure the safe and reliable use of the window bonding structure.