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首页> 外文会议>Sixth International Colloquium on Ageing of Materials and Methods for the Assessment of Lifetimes of Engineering Plant, Apr 30-May 4, 2001, Cape Town/South Africa >REMARKS ON SOME APPROXIMATE PLANT ASSESSMENT METHODS
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REMARKS ON SOME APPROXIMATE PLANT ASSESSMENT METHODS

机译：关于某些近似植物评估方法的评论

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摘要

During design and plant operation, assessments of optimum reliability and safe component/system behaviour, is essential. This is particularly true when plant operates under conditions of creep or other material deteriorating processes. The problems involved are difficult, multi-variable and uncertain. Under those constraints, Codes of Practice present approximate methods for plant assessments, which need to be supplemented with experience of operating staff. This state of affairs can lead to assessments in which wrong decisions and actions of over-conservatism or over-optimism can arise. The paper examines some of the bases upon which common methods for assessment of crack propensity, deformation and rupture at high temperature depend, Comments are offered which caution the use of large-scale computer programs, without allowing for deterioration of material stiffness and residual strength; this can also lead to over-optimistic results. Continuum damage mechanics results are now mature enough to avoid these omissions.
机译：在设计和工厂运行期间，评估最佳可靠性和安全的组件/系统行为至关重要。当工厂在蠕变或其他材料劣化过程的条件下运行时，尤其如此。所涉及的问题是困难的，多变量的和不确定的。在这些限制下，《业务守则》提出了近似的工厂评估方法，需要操作人员的经验加以补充。这种状况可能导致评估，从而导致错误的决策和过度保守或过度乐观的行为。本文研究了评估高温下的裂纹倾向，变形和断裂的常用方法所依赖的一些基础。提供了一些评论，这些评论警告不要使用大型计算机程序，而不会降低材料的刚度和残余强度。这也可能导致过度乐观的结果。连续损伤力学结果现在已经足够成熟，可以避免这些遗漏。

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