A5019927143- Fatigue and fracture mechanics
- Metal Forming Simulation Techniques
- Microstructure and mechanical properties
- Metallurgy and Material Forming
- High Temperature Alloys and Creep
- High-Velocity Impact and Material Behavior
- Microstructure and Mechanical Properties of Steels
- Numerical methods in engineering
- Fusion materials and technologies
- Nuclear Materials and Properties
- Non-Destructive Testing Techniques
- Material Properties and Failure Mechanisms
- Composite Material Mechanics
- Nuclear Engineering Thermal-Hydraulics
- Rock Mechanics and Modeling
- Nuclear reactor physics and engineering
- Metal and Thin Film Mechanics
- Nonlocal and gradient elasticity in micro/nano structures
- Metallurgical Processes and Thermodynamics
- Welding Techniques and Residual Stresses
- Mechanical stress and fatigue analysis
- Fire effects on concrete materials
- Structural Load-Bearing Analysis
- Advanced Numerical Analysis Techniques
- Metal Alloys Wear and Properties
Joint Research Centre
2015-2024
Belgian Nuclear Research Centre
2018
Energy Research Centre of the Netherlands
2014
European Commission
2012
Jožef Stefan Institute
2002-2011
Neutron irradiation and temper embrittlement in nuclear power plants (NPPs) lead to microstructural changes structural materials which induce a shift of the ductile brittle transition temperature (DBTT) towards higher temperatures. Monitoring DBTT NPP components receives therefore considerable attention — particular context long term operation. In that small specimen testing techniques are developed for characterizing with limited amount material. One most used these miniature is punch (SP)...
Understanding and controlling early damage initiation evolution are amongst the most important challenges in nuclear power plants, occurring ferritic, austenitic steels nickel based alloys. In this work a meso-scale approach to modeling of intergranular cracking is presented. This mechanism present number plant components depends on material (e.g. composition, heat treatment, microstructure), environment load. Finite element used explicitly model microstructure – both grains grain...
A finite element analysis is performed on the heat transfer process across tank walls to determine temperature distributions of hydrogen storage tanks during fast filling. The accuracy numerical model shown by comparison between experimental measurements and computed results. sensitivity wall thermal conductivity, specific capacity, density coefficient tank's external surface ambient air carried out resulting effects are described. properties composite layer have a larger effect history than...
The Small Punch (SP) technique is a miniature test used for characterizing irradiated materials or when testing material available only in small quantities. In this work Finite Element (FE) models are developed to support the parametric analysis of SP fuel cladding tube specimens comparison standard flat ones. FE shows that there practically no differences between circular and rectangular specimens. specimen results slightly higher maximal force (Fm). However, Fm attained at significantly...
The M4F project brings together the fusion and fission materials communities working on prediction of radiation damage production evolution their effects mechanical behaviour irradiated ferritic/martensitic (F/M) steels. It is a multidisciplinary in which several different experimental computational science tools are integrated to understand model complex phenomena associated with formation irradiation induced defects macroscopic target materials. In particular focuses two specific aspects:...
This paper presents an analysis of thermal fatigue tests pipe components with 14 mm wall thickness made 316L austenitic steel or P91 ferritic-martensitic steels. The are done by heating the pipes to 550 °C induction and then cyclic cooling water resulting in secondary stresses axial constant a primary stress between 0 100 MPa. damage evolution crack depth is measured X-ray tomography time-of-flight-diffraction. A very complex cracking observed for cases no load, increasing load dominant...
• Successful multi material SP assessments in a wide temperature range shown. Good robust R m estimates by different force to stress conversion models. The Chakrabarty models can be used for of non-standard test set-ups. on curved samples such as cladding tubes correcting tube curvature. Small Punch (SP) has shown number applications that it successfully ranking and property estimation, especially where standard tests cannot applied due sampling location or the amount available. most sought...
The Small Punch (SP) test with constant deflection rate is a miniature technique that can provide estimates on the material tensile properties. Linear correlations are usually used for relating maximum force and displacement at force, recorded during SP test, to ultimate strength. Fitting coefficients in calibrated data from flat specimens. requires only small amount of testing which represents clear benefit when irradiated samples have be tested. Therefore, there considerable interest using...
ABSTRACT The paper presents an analysis of the effect grain orientations on a short Stage I surface crack in 316L stainless steel. is based plane‐strain finite element crystal plasticity model. model consists 212 randomly shaped, sized and oriented grains that loaded monotonically uniaxial tension to maximum load 1.12 R p 0.2 (280 MPa). influence random structure assessed by calculating tip opening (CTOD) sliding displacements (CTSD) for single polycrystal models, considering also different...
The Gurson-Tvergaard-Needleman damage model is implemented in Small Punch (SP) finite element with the purpose of evaluating influence crack initialization and propagation on SP force–displacement (F-v) curves maximum force, Fm, which used for estimating Rm. Five materials, significantly different Rm ductility are investigated. Numerical calculations performed compared to experimental measurements evaluate accuracy model. It shown that capable capturing cold worked 15-15Ti stainless steel...