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首页> 外文期刊>Journal of thermal stresses >COUPLED THERMOELASTIC ANALYSIS OF PERFECT ROLLING CONTACT: SOLUTION BEHAVIOR NEAR YIELD INITIATION
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COUPLED THERMOELASTIC ANALYSIS OF PERFECT ROLLING CONTACT: SOLUTION BEHAVIOR NEAR YIELD INITIATION

机译：完美滚动接触的耦合热弹分析：接近屈服的溶液行为

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摘要

An insulated rigid cylinder of infinite length rolls without slip on a half-space at constant rolling speed. The equations of coupled thermoelasticity in the dynamic steady state hold. The analytical solution for the mixed boundary-value problem is extracted from robust asymptotic versions of exact integral transforms. The solution, in turn, gives contact zone size and location, and temperature change and von Mises yield function on the contact zone. The function exhibits a maximum at the contact zone center, which is above the location of its maximum in the half-space. For some insight into behavior near yield initiation, therefore, contact zone center yield is used to derive expressions for the corresponding contact zone size, com-pressive load on the cylinder, and zone temperature increase. Calculations for 4340 steel indicate that initiation is multi-axial and that mild temperature increases occur. In addition, the contact zone center, which corresponds to the contact point in the rigid-rigid limit, is found to have a small tangential speed. The rolling speed is allowed to take any value between zero and the thermoelastic Rayleigh speed. This range perhaps exceeds that required in applications, but allows a clearer view of variation with rolling speed.
机译：无限长度的绝缘刚性圆柱体以恒定的轧制速度在半个空间上滚动而不打滑。动态稳态下的耦合热弹性方程成立。从精确积分变换的鲁棒渐近版本中提取了混合边值问题的解析解。进而，该解决方案给出了接触区的大小和位置，以及温度变化和接触区上的冯·米塞斯屈服函数。该函数在接触区中心处显示最大值，该最大值高于半空间中最大值的位置。因此，为了对屈服开始附近的行为有一些了解，可以使用接触区中心屈服来推导相应接触区大小，圆柱体上的压缩载荷以及区域温度升高的表达式。对4340钢的计算表明，引发是多轴的，并且出现了温和的温度升高。另外，发现对应于刚硬极限中的接触点的接触区中心具有较小的切向速度。允许轧制速度取零到热弹性瑞利速度之间的任何值。该范围可能超出了应用程序所需的范围，但可以更清楚地了解轧制速度的变化。

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