【摘要】 缩口应力是导致薄壁筒形件缩口失稳的重要因素,为了提高缩口应力的计算精度,综合考虑了板厚变化、加工硬化及摩擦等因素的影响,采用斯德洛日夫和翁克索夫的两种求解方法,通过实例计算了圆筒形件的缩口应力以及在不考虑厚度变化及硬化效应条件下的缩口应力,并对3种计算结果进行了比较,前两种方法的计算结果十分接近,但后者相差甚远。由此得出,厚度变化和硬度效应的影响相当显著,不可忽视。更多还原

【Abstract】 The unstable contraction is the main failure factor when the thin-wall cylindrical parts are shaped. To improve the calculation precision of contracting force, many factors including the thickness change, the hardening effect and the friction should be all considered during the calculating process. In this paper, the contracting force of the thin-wall cylindrical parts is calculated respectively by using СТОРОЖЕВ method and УНКСОВ method considering the thickness change and the hardening effect. Meanwhile, it is calculated also without considering the thickness change and the hardening effect. Comparing with afore-mentioned three calculation results, it is found that the thickness change and the hardening effect have a profound influence on the calculation results of the contracting force.更多还原