Abstract
The objective of a co-ordinated research programme on ‘lifetime predictions for the first wall of fusion machines’ was to intercompare methods used in the several participating laboratories for predicting lifetime analyses of the first wall components and to compare these analytical predictions with the results of fatigue experiments performed at JRC-Ispra. The first part of the IAEA benchmark considered initially defect-free components. This exercise showed that the thermal fatigue life of prototype FW components can be adequately predicted by several design codes. The second part of the IAEA benchmark dealt with a crack propagation experiment. The main conclusions found there are, that different methods for the evaluation of the range in stress intensity factor lead to very good agreement,and that elastic—plastic fracture mechanics is necessary to predict the crack extension.
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