Publication detail

Fatigue damage prediction of short edge crack under various load: Direct Optimized Probabilistic Calculation

KREJSA, M. SEITL, S BROZOVSKY, J LEHNER, P.

Original Title

Fatigue damage prediction of short edge crack under various load: Direct Optimized Probabilistic Calculation

Type

conference paper

Language

English

Original Abstract

Fatigue crack propagation depends on a number and value of stress range cycles. This is a time factor in the course of reliability for the entire designed service life. Three sizes are important for the characteristics of the propagation of fatigue cracks - initial size, detectable size and acceptable size. The theoretical model of a fatigue crack progression can be based on a linear elastic fracture mechanics (uses Paris-Erdogan law). Depending on location of an initial crack, the crack may propagate in structural element (e.g. from the edge or from the surface under various load) that could be described by calibration functions. When determining the required degree of reliability, it is possible to specify the time of the first inspection of the construction which will focus on the fatigue damage. Using a conditional probability and Bayesian approach, times for subsequent inspections can be determined based on the results of the previous inspection. For probabilistic modelling of a fatigue crack progression was used the original and a new probabilistic method - the Direct Optimized Probabilistic Calculation ("DOProC"), which uses a purely numerical approach without any simulation techniques or approximation approach based on optimized numerical integration. Compared to conventional simulation techniques is characterized by greater accuracy and efficiency of the computation.

Keywords

Fatiguecrack propagationcalibration functionprobabilityDirect Optimized Probabilistic CalculationDOProC

Authors

KREJSA, M.; SEITL, S; BROZOVSKY, J; LEHNER, P.

Released

4. 9. 2017

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

5

Number

2017

State

Republic of Italy

Pages from

1283

Pages to

1290

Pages count

8

URL

http://www.sciencedirect.com/science/article/pii/S2452321617302196

BibTex

@inproceedings{BUT140501,
  author="KREJSA, M. and SEITL, S and BROZOVSKY, J and LEHNER, P.",
  title="Fatigue damage prediction of short edge crack under various load: Direct Optimized Probabilistic Calculation",
  booktitle="Procedia Structural Integrity",
  year="2017",
  journal="Procedia Structural Integrity",
  volume="5",
  number="2017",
  pages="1283--1290",
  doi="10.1016/j.prostr.2017.07.107",
  issn="2452-3216",
  url="http://www.sciencedirect.com/science/article/pii/S2452321617302196"
}