Main features of PASCAL:
- Elasto-plastic fracture analysis based on R6 method is introduced. A fracture transition from brittle to ductile tearing can be analyzed based on the treatment of crack extension analysis of R6 method. An accuracy of failure probability around upper shelf temperature can significantly be improved. Thus, this code can be applicable to other components which exhibit the ductile fracture mode.
- Initial flaw of an infinite edge crack and a semi-elliptical crack can be analyzed. For semi-elliptical crack extension analysis, three simulation models, i.e., Model 1, 2 and 3 are introduced as described later. Based on Model 3, an accurate crack extension analysis including the crack aspect ratio during extension can be performed compared with existing codes which employ a simplified analysis procedure.
- Semi-elliptical initial flaw of a given aspect ratio, given length and given geometry and aspect ratio distribution can be analyzed.
- An approximate method is introduced to evaluate the influence of overlay cladding by dividing the stress distribution into three distributions and superposing the stress intensity factors obtained from each distribution. In this method the overlay cladding is assumed to be sufficiently thin compared to base metal.
- The effect of WPS is evaluated based on the assumption that the crack initiation and extension does not occur when the stress intensity factor is decreasing.
- The effect of embrittlement recovery by thermal annealing of a vessel can be evaluated based on the method prescribed by USNRC R.G. 1.162-1996.
- Effect of the crack detection capability by inspection can be evaluated.
- Importance sampling and stratified sampling are used in Monte Carlo simulation. Functions to optimize the sampling number and cell dividing procedure in the stratified Monte Carlo simulation are introduced.
- Various requirements of analyses can be supported by theuser input options and various material characteristics and many stress intensity factor solutions.