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Reliability-based optimization of maintenance scheduling of mechanical components under fatigue.
P Beaurepaire1, M A Valdebenito, G I Schuëller
1Institute of Engineering Mechanics, University of Innsbruck, Technikerstrasse 13, A-6020 Innsbruck, Austria.
Computer Methods in Applied Mechanics and Engineering
|April 9, 2013
Summary
This study optimizes maintenance scheduling for mechanical components experiencing fatigue. It uses reliability-based optimization and cohesive zone elements to model crack growth, improving structural integrity and inspection outcomes.
Area of Science:
- Mechanical Engineering
- Materials Science
- Reliability Engineering
Background:
- Mechanical components are susceptible to fatigue loading, leading to crack initiation and propagation.
- Non-destructive inspection (NDI) detects cracks, but variability exists in both crack growth and inspection outcomes.
- Effective maintenance scheduling is crucial for ensuring the reliability and safety of structures under fatigue.
Purpose of the Study:
- To optimize the maintenance scheduling of mechanical components subjected to fatigue loading.
- To develop a framework for reliability-based optimization that accounts for variability in fatigue.
- To efficiently model fatigue crack initiation and propagation for improved maintenance strategies.
Main Methods:
- Reliability-based optimization framework applied to maintenance scheduling.
- Modeling of fatigue crack initiation and propagation using cohesive zone elements.
- Numerical simulation of a plate with two holes under alternating stress to demonstrate applicability.
Main Results:
- An optimized maintenance schedule for mechanical components under fatigue loading.
- Efficient modeling of fatigue crack initiation and growth using cohesive zone elements.
- Demonstrated applicability of the reliability-based optimization method through a numerical example.
Conclusions:
- The proposed reliability-based optimization approach effectively addresses maintenance scheduling for fatigue-critical components.
- Cohesive zone elements provide an efficient method for modeling fatigue crack behavior.
- The study provides a valuable tool for enhancing structural integrity and managing inspection uncertainties.
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