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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.2: Computer Technology; 20050717-21; Denver,CO(US) >A FINITE ELEMENT STUDY ON CONTACT PRESSURE DISTRIBUTION IN DRAW-BEND FRICTION TEST AND ITS EFFECT ON FRICTION MEASUREMENT
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A FINITE ELEMENT STUDY ON CONTACT PRESSURE DISTRIBUTION IN DRAW-BEND FRICTION TEST AND ITS EFFECT ON FRICTION MEASUREMENT

机译：弯折摩擦试验中接触压力分布的有限元研究及其对摩擦测量的影响

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摘要

Various experimental and numerical works have shown the existence of pressure peaks at the contact interface of draw-bend tests. From this observation, a need has been raised for the re-examination of the methodology to calculate the friction coefficient from the draw-bend friction test. In this paper, the draw-bend friction tests have been simulated by the explicit finite element method. By using 3D finite element models and local axis system, the existence of pressure peaks was confirmed. A non-constant friction model (Stribeck friction model), which is more realistic for sheet metal forming than a constant friction model (Coulomb friction model), was implemented into the finite element code. Simulations were performed with constant and non-constant friction models. From the comparisons, the effect of existence of pressure peaks on the friction measurement was evaluated.
机译：各种实验和数值研究表明，在弯曲试验的接触界面处存在压力峰值。根据这一观察结果，提出了重新检查从拉弯摩擦试验计算摩擦系数的方法的需求。本文通过显式有限元方法模拟了拉弯摩擦试验。通过使用3D有限元模型和局部轴系，可以确认压力峰值的存在。将非恒定摩擦模型（Stribeck摩擦模型）（比起恒定摩擦模型（Coulomb摩擦模型）更适合钣金成型）实施到了有限元代码中。使用恒定和非恒定摩擦模型进行仿真。通过比较，评估了压力峰值的存在对摩擦测量的影响。

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