โ Scribed by D.M. Qi
No coin nor oath required. For personal study only.
The British Standards Institution document PD6493 (1980) "Guidance on some methods for the derivation of acceptance levels for defects in fusion welded joints" is currently under revision. The fracture section of the new document uses two-parameter failure assessment diagrams and permits assessments of the significance of wefd defects at three levels of complexity. This paper presents new procedures for the treatment of secondary stresses for level 2 and level 3 assessments in PD6493. Comparisons are also made between the proposed procedures and the CEGB R6 procedures which are based on similar principles to the revised PD6493 document. Some validation studies are also reported in this paper.
๐ SIMILAR VOLUMES
The behaviour of a crack under combined mechanical and thermal/residual loads is described in terms of a reference stress or equivalent mechanical loading. The reference stress can be readily established from a knowledge of the stress intensity factor for the thermal/residual load, the magnitude of
Use of the person-years method for evaluating the association between treatment of a primary cancer and subsequent development of a second malignancy is reviewed. For this type of analysis, the risk of developing a second malignancy is implicitly assumed to remain constant during each patient's foll