CAJ | 학술논문

利用大型非线性有限元软件MSC.Marc，基于橡胶类材料单轴拉伸所得到的应力应变曲线，通过数据拟合确定Odgen模型的材料参数。建立O型橡胶密封圈非线性有限元计算模型，分析不同的介质压力对橡胶密封圈力学性能的影响，得到橡胶密封圈的Von-mises应力的分布规律、主接触面以及侧接触面接触应力的分布曲线。研究结果表明：随着介质压力的增加，Von-mises应力随之增加，并向密封圈与沟槽的接触区域转移。在主接触面和侧接触面接触应力的分布近似为二次抛物线，接触应力的最大值出现在接触区的中点，随着介质压力的增加，接触应力的峰值和接触宽度明显增加，且应力峰值均大于介质压力，能够较好地防止介质的泄漏。
이용대형비선성유한원연건MSC.Marc，기우상효류재료단축랍신소득도적응력응변곡선，통과수거의합학정Odgen모형적재료삼수。건립O형상효밀봉권비선성유한원계산모형，분석불동적개질압력대상효밀봉권역학성능적영향，득도상효밀봉권적Von-mises응력적분포규률、주접촉면이급측접촉면접촉응력적분포곡선。연구결과표명：수착개질압력적증가，Von-mises응력수지증가，병향밀봉권여구조적접촉구역전이。재주접촉면화측접촉면접촉응력적분포근사위이차포물선，접촉응력적최대치출현재접촉구적중점，수착개질압력적증가，접촉응력적봉치화접촉관도명현증가，차응력봉치균대우개질압력，능구교호지방지개질적설루。
By utilizing nonlinear finite element analysis software MSC.Marc,the material parameters of Odgen model were determined through curve fitting by using the experimental data of uniaxial tensile experiments of rubber-like materi-als.The nonlinear finite element model of rubber O-ring seals was set up and the influence of different medium pressure on the mechanical properties of rubber O-ring seals was analyzed.The distribution of Von-mises stress and contact stress on primary contact surface and side contact surface was achieved.The results show that with the increase of medium pressure, the Von-mises stress is increased and transfered to the contact zone between rubber seal and groove,and its distribution on primary contact surface and side contact surface is approximate quadratic parabola.The maximum contact stress appears on the middle contact zone,and it is increased obviously with the increases of medium pressure.The maximum contact stress is greater than medium pressure,which can prevent the leakage of medium.