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首页> 外文会议>2002 ASME Pressure Vessels and Piping Conference, Aug 5-9, 2002, Vancouver, British Columbia, Canada >COMPARISON OF METHODS FOR CALCULATING STRESS INTENSITY FACTORS FOR A CLOSURE THREAD
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COMPARISON OF METHODS FOR CALCULATING STRESS INTENSITY FACTORS FOR A CLOSURE THREAD

机译：闭合线应力强度因子计算方法的比较

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摘要

Non-mandatory Appendix D of Section Ⅷ, Division 3 of the ASME Boiler and Pressure Vessel Code provides a method for calculating the stress intensity factors for the region of a thread root of a threaded closure. This method involves calculation of the distribution of stress acting on a plane normal to the axis of the thread. This distribution is fitted with several different cubic equations for different regions and the coefficients of these cubic equations are entered into an equation to calculate the distribution of stress intensity factor for each region. The values of stress intensity factor for each region after the first one are shifted to obtain a continuous distribution Neubrand and Burns, 1999 determined the distribution of stress intensity factor for a specific closure thread using weight function methods. In the present paper the stress intensity factors for this same closure design were calculated using the method from Appendix D of Division 3 as described above. Distributions are also calculated using a proposed modification of this method, and also by the method given in Appendix D for cracks in areas of the vessel at which the gradient of the stress distribution is less steep.
机译：ASME锅炉和压力容器规范第3节Division部分的非强制性附录D提供了一种计算螺纹封闭件螺纹根部区域应力强度因子的方法。该方法涉及计算作用在垂直于螺纹轴线的平面上的应力分布。该分布适合于不同区域的几个不同的立方方程，这些立方方程的系数被输入到一个方程中以计算每个区域的应力强度因子的分布。将第一个区域后每个区域的应力强度因子的值移动以获得连续分布Neubrand和Burns，1999使用权函数方法确定特定闭合线的应力强度因子的分布。在本文中，使用上述第3部​​分附录D的方法计算了相同封闭设计的应力强度因子。分布也可以使用该方法的建议修改形式以及附录D中针对应力分布梯度不太陡的容器区域中的裂缝进行计算。

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