A5101725611- Fatigue and fracture mechanics
- Mechanical stress and fatigue analysis
- Metal Forming Simulation Techniques
- Hydrogen embrittlement and corrosion behaviors in metals
- Structural Load-Bearing Analysis
- Advanced Algorithms and Applications
- Material Properties and Failure Mechanisms
- Advanced Welding Techniques Analysis
- Microstructure and Mechanical Properties of Steels
- High Temperature Alloys and Creep
- Industrial Technology and Control Systems
- Offshore Engineering and Technologies
- Concrete and Cement Materials Research
- High-Velocity Impact and Material Behavior
- Structural Response to Dynamic Loads
- Structural Integrity and Reliability Analysis
- Drilling and Well Engineering
- Asphalt Pavement Performance Evaluation
- Surface Modification and Superhydrophobicity
- Structural Health Monitoring Techniques
- Tribology and Wear Analysis
- Fire effects on concrete materials
- Transportation Safety and Impact Analysis
- Smart Grid and Power Systems
- biodegradable polymer synthesis and properties
Harbin Institute of Technology
2024
Shaanxi Coal Chemical Industry Technology Research Institute
2024
China University of Mining and Technology
2011-2023
Sichuan Highway Design and Research Institute
2023
China National Offshore Oil Corporation (China)
2021-2023
Southwest Jiaotong University
2023
Nanjing Forestry University
2023
Science and Technology Department of Sichuan Province
2023
Shandong University of Science and Technology
2020
Chongqing Jiaotong University
2014
Applying fracture mechanics theory to heterogeneous welded joints might lead an uncertain assessment of fatigue crack propagation behavior and, consequently, inaccurate estimation the cyclic loading capacity and life structures. Combining experimental testing analytical equations marine overmatched D32 structural steel provided a view influence strength heterogeneity on growth (FCG) under constant loading. FCG was conducted using compact tension specimens different stress ratios. The effect...
Semiflexible pavement (SFP) includes asphalt mixture skeleton, cement mortar, and residual voids. The heat conduction behaviors in the SFP become very complicated. To understand SFP, discrete element model (DEM) of was first established. Then behaviors, temperature field distribution, effects pores on were investigated. Results indicate that distribution at same depth is relatively uniform, mainly happens vertical direction. aggregate requires more to rise temperature, successively followed...
Pulsed Nd:YAG has been adopted successfully in welding process of thin (0.7 mm) Ti6Al4V. Laser such sheet requires a small focal spot, good laser beam quality and fast travel speed, since too much heat generation can cause distortion for weld. The microstructures Ti6Al4V were complex strongly affected the mechanical properties. These structures include: α´ martensite, metastable β, Widmanstätten, bimodal, lamellar equiaxed microstructure. Bimodal Widmanstätten exhibit good-balance between...
Abstract The additional local stress concentration caused by undercut and misaligned defects could lead to lower fatigue strength of welded joints. paper aims investigate the effects undercuts misalignments on performance reliability Load‐carrying Cruciform Welded Joint (LCWJ) quantitatively probabilistic statistics theory fracture mechanics theory. Firstly, geometrical characteristics misalignment are summarized from literature our experiments. Subsequently, distributions material...
The fatigue crack propagation of 304 austenitic stainless steel was studied both by experiments and numerical simulations. Two methods were applied to simulate the propagation: extended finite element method (XFEM) cohesive zone model (CZM). Based on XFEM, direct cyclic solver used propagation. CZM, VUMAT subroutine describe tip constitutive equation during propagation, mechanical properties simulated. effects different frequency, f, stress ratio, R, growth life XFEM CZM separately compared...
Welding of steel is a technique frequently used in practical engineering applications; however, their mechanical performance strongly dependent on the physical metallurgical status weldments. In present study, fully reversed, strain-controlled low-cycle fatigue (LCF) tests were conducted 10CrNi3MoV and its undermatched weldments with strain amplitudes varying from Δ ε = ±0.5 to ±1.2%. Both base metal exhibited softening behavior at beginning cyclic stage. Numerical investigations...
Abstract Fatigue experiments and numerical simulations based on the linear elastic fracture mechanics (LEFM) theory were conducted evenmatched (EM) undermatched (UM) 10CrNi3MoV load‐carrying cruciform welded joints (LCWJs). The study firstly experimentally investigated fatigue crack growth rate (FCGR) of base metal, EM, UM weldments. corresponding Paris parameters as essential input data are provided to assess propagation behavior for weld toe root failure caused by notch stress...
This paper studies the effects of temperature and crack tip constraint on cleavage fracture toughness weld thermal simulated X80 pipeline steels. A large number (as denoted by CTOD) tests together with 3D finite element analysis are performed using single edge notched bending (SENB) tension (SENT) specimens at different temperatures. Coarse-grained heat-affected zone (CGHAZ) is considered as material microstructure in preparation mechanics specimens.
This work presents an investigation of the effects temperature and crack growth on cleavage fracture toughness for weld thermal simulated X80 pipeline steels in ductile-to-brittle transition (DBT) regime. A great bulk (crack tip opening displacement—CTOD) tests numerical simulations are carried out by deep-cracked single-edge-notched bending (SENB) shallow-cracked tension (SENT) specimens at various temperatures (−90 °C, −60 −30 0 °C). Three-dimensional (3D) finite element (FE) models tested...
In this study, the effects of residual stresses on ductile crack growth resistance was investigated using single-edge-notched bending (SENB) and tension (SENT) specimens as well axisymmetric model. Weld were introduced by so-called eigenstrain method. The tip opening displacement (CTOD) constraint parameter R calculated for different stresses. Results show that slightly reduced resistance. However, elevated with increase stress.