ULTRASONIC INVESTIGATION OF THE STIFFNESS OF GRAPHITE-GRAPHITE INTERFACES

机译：石墨-石墨界面刚度的超声研究

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The behavior of the loaded interface between machined graphite blocks, as employed in Magnox-type atomic power reactors has been investigated. Low frequency ultrasonic reflection coefficients allow the true degree of contact between the blocks to be assessed, and the stiffness of the interface to be isolated from bulk effects. It has been shown that this stiffness is a function of the surface roughness, but that there is very little dependence on loading history, i.e. the small degree of plasticity produces only a slight 'shakedown' of the surface asperities. Numerical modelling of the interface behavior has also been carried and only a fairly poor agreement with experiemntal data has been found. It is suggested that this is due to the granular nature of the graphite, and can possibly be allowed for in future modelling.

机译：已经研究了Magnox型原子能反应堆采用的机械加工石墨块之间的加载界面行为。低频超声反射系数可以评估块之间的真实接触程度，并且可以将界面的刚度与体积效应隔离开。已经表明，该刚度是表面粗糙度的函数，但是对加载历史的依赖性很小，即，小的塑性程度仅导致表面粗糙的轻微“降低”。还进行了界面行为的数值建模，并且仅发现与实验数据的相当差的一致性。建议这是由于石墨的颗粒性质，可能在将来的建模中允许使用。

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来源
《Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US)》|1998年|P.1495-1500|共6页
会议地点 SnowbirdUT(US)
作者
A. M. Robinson; B. W. Drinkwater; R. S. Dwyer-Joyce;
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作者单位

Department of Mechanical Engineering, Queen's Building, University Walk, University of Bristol, Bristol, U.K. BS8 1TR;

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原文格式 PDF
正文语种 eng
中图分类无损探伤仪器;
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机译：超声波对石墨-石墨界面刚度的研究

ULTRASONIC INVESTIGATION OF THE STIFFNESS OF GRAPHITE-GRAPHITE INTERFACES

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