Research Output per year

### Abstract

This study proposes a cyclic yield strength (CYS, σc ) as a key characteristic for the definition of safe design for engineering structures operating under fatigue and creep conditions. CYS is defined on a cyclic stress-strain curve, while monotonic yield strength (MYS, σm ) is defined on a monotonic stress-strain curve. Both values of σc and σm are identified using a 2-steps fitting procedure of the experimental stress-strain curves using Ramberg-Osgood and Chaboche material models. Comparison of σc and fatigue endurance limit σf on the S-N fatigue curve reveals that they are approximately equal. Hence, basically safe fatigue design is guaranteed in purely elastic domain defined by the σc . A typical creep rupture curve in time-to-failure approach for creep analysis has 2 inflections corresponding to the σc and σm . These stresses separate 3 sections on the creep rupture curve, which are characterised by 3 different creep fracture modes and 3 creep deformation mechanisms. Thus, basically safe creep design is guaranteed in linear creep domain with brittle failure mode defined by the σc . These assumptions are confirmed for several structural low- and high-alloy steels for normal and high-temperature

applications.

applications.

Original language | English |
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Pages (from-to) | 365-366 |

Number of pages | 2 |

Journal | Proceedings in Applied Mathematics and Mechanics, PAMM |

Volume | 14 |

Issue number | 1 |

Early online date | 21 Mar 2014 |

DOIs | |

Publication status | Published - Dec 2014 |

Event | 85th Annual Meeting of the International Association of Applied Mathematics and Mechanics, GAMM 2014 - Erlangen-Nürnberg, Germany Duration: 10 Mar 2014 → 14 Mar 2014 |

### Keywords

- cyclic analysis
- design limits
- fatigue assessment
- creep-fatigue strength

## Fingerprint Dive into the research topics of 'Cyclic yield strength in definition of design limits for fatigue and creep'. Together they form a unique fingerprint.

## Research Output

- 1 Article

## On cyclic yield strength in definition of limits for characterisation of fatigue and creep behaviour

Gorash, Y. & MacKenzie, D., 23 Jun 2017, In : Open Engineering. 7, 1, p. 126-140 15 p.Research output: Contribution to journal › Article

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