A5092898548- Fatigue and fracture mechanics
- Microstructure and Mechanical Properties of Steels
- Structural Health Monitoring Techniques
- Advanced Welding Techniques Analysis
- Probabilistic and Robust Engineering Design
- Metal Forming Simulation Techniques
Atlas Copco (Sweden)
2023-2024
Linköping University
2023-2024
The length-scale dependence of fatigue crack growth is evaluated for a set metallic materials, namely titanium Ti-6Al-4V, ductile iron EN-GJS-500-7 and tool steel AISI H13, by performing tests on geometrically similar compact C(T) specimens different sizes. With references to length-scale-invariant variables, notably the rate normalised specimen width, it demonstrated that not process tested conditions. In particular, less significant larger at longer lengths. test results also contradict...
To account for or neglect the defect position, i.e. fatigue initiating location, both radially and axially, is evaluated hourglass-shaped ultrasonic specimen. The commonly used analytical equations to calculate stress compared against a finite element (FE) based approach, which able fully considering state at position. Notably, effects on several common analyses are evaluated: strength distribution, stress–life stress–defect relationships. Fracture mechanical assessment also performed,...
A general testing and analysis framework for the Step-Stress fatigue method is identified, utilizing interval-censored data maximum likelihood estimation in an effort to improve of strength distribution parameters has been performed. The method's limitations are characterized, using a simple material model that considers cumulative damage evaluate load history effects. In this way, performance including was evaluated quantified probabilistic approach with Monte-Carlo simulations, benchmarked...