A5101948210- Fatigue and fracture mechanics
- High Temperature Alloys and Creep
- Engineering Structural Analysis Methods
- Hydrogen embrittlement and corrosion behaviors in metals
- Welding Techniques and Residual Stresses
- Mechanical Failure Analysis and Simulation
- Nuclear Materials and Properties
- Non-Destructive Testing Techniques
- Nuclear Engineering Thermal-Hydraulics
- Metal Forming Simulation Techniques
- Material Properties and Failure Mechanisms
- Metallurgy and Material Forming
- Probabilistic and Robust Engineering Design
- Nuclear and radioactivity studies
- Microstructure and Mechanical Properties of Steels
- Fire effects on concrete materials
- Hydraulic Fracturing and Reservoir Analysis
- Engineering Applied Research
- Nuclear reactor physics and engineering
- Composite Structure Analysis and Optimization
- Structural Engineering and Vibration Analysis
- Soil, Finite Element Methods
- Structural Integrity and Reliability Analysis
- Drug Solubulity and Delivery Systems
- Coal Properties and Utilization
Suzhou Research Institute
2015-2022
Hunan University
2020
Wildfowl & Wetlands Trust
2015-2017
Saint-Gobain (France)
2016
Amec Foster Wheeler (Czechia)
2015
Clean Energy (United States)
2015
China University of Petroleum, Beijing
2014
Olympus (United Kingdom)
2013
Serco (United Kingdom)
2007-2011
Ningxia University
2008
A method for bounding limit loads by an iterative elastic continuum finite element analysis procedure, referred to as the compensation method, is proposed. number of sample problems are considered, based on both exact solutions and analysis, it concluded that may be used obtain limit-load bounds pressure vessel design applications with useful accuracy.
Summary Proppants are solid particles with specific mechanical strength that widely used in hydraulic-fracturing operations. Their main purpose is to keep fractures open and increase well production. They can be naturally occurring sand grains or synthetic ceramic proppants. The acid resistance of fracturing proppants an important property because acids during the process remove scale clays affect fracture conductivity. These already present fracture, as well. Industry measures solubility...
In this paper, a simple method for calculating lower-bound limit loads shells is presented, based on Ilyushin’s and Ivanov’s generalized yield criterion, respectively, using the elastic compensation procedure. Several examples, including torispherical conical ends, radial nozzles, skirted vessel, are examined method. The results compared with previously published results.
The integrity of a reactor pressure vessel (RPV) related to pressurized thermal shocks (PTSs) has been extensively studied. This paper introduces an assessment RPV subjected PTS transient based on the French codes. In USA, "screening criterion" for maximum allowable embrittlement material is developed probabilistic fracture mechanics. However, in RCC-M and RSE-M codes, which are deterministic mechanics, there no criterion". this paper, methodology used analysis, firstly discussed. bases...
Different pressure vessel and piping design codes standards have adopted different fatigue analysis methods. In order to make some contribution current efforts harmonize international standards, a review of methods for number selected nuclear non-nuclear has been carried out. The are ASME Boiler Pressure Vessel Code Section III Subsection NB VIII Division 2, EN 12952, 13445, 13480, PD 5500, RCC-M, RCC-MRx, JSME, PNAEG R5. This paper presents the initial results. results study could be used...
A simple approach for calculating upper-bound shakedown loads is described. The method based on a series of iterative elastic finite element analyses (the compensation procedure) applied to Koiter’s theorem. demonstrated typical pressure vessel application; an axisymmetric nozzle in spherical shell. Several geometrical configurations are investigated. calculated compared with lower-bound results obtained by the authors, criteria, and various given literature.
Mechanical strength of insulation paper was the key factor for life large oil-immersed transformer. To more accurately assess paper, aging mechanisms transformer were analysed and a new method using activation energy proposed to access paper's life. Then prediction model defined. Accelerated tests oil-paper samples executed under different temperatures. According test results, parameters found out. So, working condition could be calculated. In end, an example evaluation given illustrate...
The safe-end of a steam generator (SG) nozzle dissimilar metal weld (DMW) for pressurized water reactors (PWRs) is the weakest point failure which crucial safe operation nuclear power station. Related to materials micro-structures, uniaxial stress–strain relationship basic input parameter plant design, safety evaluation, and life management. In this paper, micro-structure tensile mechanical properties DMW European reactor (EPR) were studied. Vickers hardness tester, optical microscope,...
Abstract A simple method for calculating lower and upper bound shakedown loads based on iterative elastic finite element analysis the bounding theorems of classical plasticity is presented. Elastic residual stress strain fields, suitable substitution into Melan’s theorem Koiter’s theorem, are obtained by applying compensation method, in which modulus each an systematically modified according to calculated values from previous iteration form fields. As a demonstration sample plane problem —...
In order to assess postulated defects in the butt weld joining a 90 degree elbow seamless straight pipe, both axial and hoop stress components at this position are required. ASME III NB-3685 provides method of calculating stresses. However, gives maximum values applies central section bend. If these directly used defect assessments welds ends elbow, assessment results will be overly conservative. obtain appropriate results, more accurate distributions desirable. paper, predicted by deriving...
Many stainless steel canisters for the dry storage of spent nuclear fuel are located in coastal regions. Because heat treatment relieving welding residual stress is not required during fabrication, these may be susceptible to chloride induced corrosion cracking due deliquescence chloride-bearing marine salts or dust that enter overpack system and deposit on canister external surface. The NDE techniques associated delivery being developed conduct periodic inservice inspections. acceptance...