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装配式高压容器(蓄压器,作动筒)一般由端盖和筒体组成,用双头螺栓联接成一体。常规设计中除强度外,考虑到密封性,还要进行刚度计算。我们设计的几个高压容器端盖的厚度和筒体(油缸)的壁厚均由刚度计算确定。随着压力的增大,高压容器中采用高和超高强度钢材料后,由于材料的初始缺陷带来的低应力爆破和脆断现象,按以前常规的强度计算方法不能保证安全使用,需要由新发展而成的《断裂力学》进行补充计算。
Assembled high-pressure container (pressure accumulator, actuator) is generally composed of end caps and barrel, with stud bolts connected into one. In addition to the strength of conventional design, taking into account the sealing, but also for stiffness calculation. We designed several high-pressure container end cap thickness and cylinder (cylinder) wall thickness are determined by the stiffness calculation. With the increase of pressure, the use of high and ultra-high strength steel materials in high pressure vessels can not be safely used according to the conventional strength calculation method due to the low-stress blasting and brittle fracture caused by the initial defects of materials. Newly developed “fracture mechanics” to make additional calculations.