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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.1: Codes and Standards >FATIGUE TESTING AND LIFE ESTIMATES OF WELDED FLAT HEAD PRESSURE VESSEL JOINTS
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FATIGUE TESTING AND LIFE ESTIMATES OF WELDED FLAT HEAD PRESSURE VESSEL JOINTS

机译：焊接扁平头压力容器接头的疲劳测试和寿命估算

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摘要

Experimental results for the cyclic pressure fatigue of several pressure vessels with flat heads are reported and compared against various fatigue design methods. The geometry is based on a welded joint presented in a recent paper by Kalnins, Bergsten, and Rana (2005). Weld designs between the head and shell include full penetration welds completed from a single side and both sides of the shell. Unique characteristics of this test include thin plate design, a large D/t ratio, and a low membrane-to-bending ratio. These are aspects of flat head geometries which have not been widely reported in the literature. Allowable fatigue cycles for ASME Section Ⅷ, Division 2, IIW, PD 5500, EN 13445, API 579, and the Master S-N method (proposed for the ASME Section Ⅷ, Division 2 rewrite project) are presented. Results show that several of these design method produce non-conservative fatigue life predictions. In addition, the fatigue results demonstrate that size effects and plate thickness effects have diminishing influence for thin plates failing at less than 100,000 cycles. Finally, the fatigue strength of stainless steel is compared to carbon steel and the lack of a unified approach to stainless steel fatigue design is discussed.
机译：报道了几种平头压力容器的循环压力疲劳实验结果，并与各种疲劳设计方法进行了比较。几何形状基于Kalnins，Bergsten和Rana（2005）最近发表的论文中提出的焊接接头。头部和外壳之间的焊接设计包括从外壳的单侧和两侧完成的全熔透焊缝。该测试的独特特征包括薄板设计，大的D / t比和低的膜弯比。这些是扁平头几何形状的方面，在文献中尚未广泛报道。提出了ASMEⅧ部分2区IIW，IIW，PD 5500，EN 13445，API 579和Master S-N方法（针对ASMEⅧ部分2区重写项目建议的）的允许疲劳周期。结果表明，这些设计方法中的几种产生了非保守的疲劳寿命预测。此外，疲劳结果表明，尺寸效应和板厚效应对小于100,000次循环失效的薄板的影响减小。最后，将不锈钢的疲劳强度与碳钢进行了比较，并讨论了缺乏统一的不锈钢疲劳设计方法。

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