MODELLING OF STRESS GRADIENT EFFECT ON FATIGUE LIFE USING WEIBULL BASED DISTRIBUTION FUNCTION
Abstract
In the present paper, a new approach is developed in order to take into account the stress gradient effect on fatigue life of structural components. The proposed approach is based on the weakest link concept in which the shape coefficient of the Weibull distribution becomes a function of a local damage parameter. The function simulates the experimentally observed relationship between the shape of the fatigue life distribution and the stress level. Such an approach allows one to calculate the global probability distribution of the fatigue life for notched structural components in a wide range of fatigue life regime: 104-107 cycles typically. For comparison purposes, the approach is applied to calculate the number of cycles to crack initiation of structural elements under three probability levels: 5%, 63% and 95%. The calculated lifetimes are compared with the lifetimes obtained from experiments performed on notched cruciform specimens and notched round specimens subjected to constant amplitude loading.
Files in this item
- Name:
- 2013-2-karolczuk-palin-luc_J_t ...
- Size:
- 841.6Kb
- Format:
- Description:
- Article publié dans Journal of ...
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureHÉBRARD, Louis;
PALIN-LUC, Thierry;
RANC, Nicolas; WECK, Arnaud; DOUILLARD, Thierry; BLANCHARD, Nicholas; DANCETTE, Sylvain; BUFFIERE, Jean-Yves (Elsevier BV, 2025-04)
Ultrasonic fully reversed tension fatigue tests have been performed in the Very High Cycle Fatigue (VHCF) regime (Nr> 1E7 − 1E8 cycles) on Ti-6Al4V specimens containing a controlled internal notch. Two sets of samples have ... -
Article dans une revue avec comité de lectureDEHMANI, Helmi;
PALIN-LUC, Thierry;
MAREAU, Charles; KOECHLIN, Samuel;
BRUGGER, Charles (Elsevier, 2016)
In this paper, the impact of punching operations on the high cycle fatigue strength of Fe–Si thin sheets is investigated. High cycle fatigue tests are performed on both punched and polished edge specimens. Results show a ... -
Communication avec acte
LE, Viet-Duc;
BELLETT, Daniel;
MOREL, Franck;
SAINTIER, Nicolas;
PALIN-LUC, Thierry;
PESSARD, Etienne; OSMOND, Pierre (MATEC Web of Conferences, 2014)
The aim of this work is to propose simple analytical tools to predict the fatigue strength of cast aluminium components as a function of the casting process and post-cast treatment. The proposed methodology is based on the ... -
Article dans une revue avec comité de lectureNumerical study of high cycle fatigue behaviour of copper polycrystalline aggre- gates. An analysis of high cycle fatigue behaviour is undertaken via the numerical simulation of polycrystalline aggregates. The metallic ...
-
Article dans une revue avec comité de lecturePlastic dissipation at the crack tip under cyclic loading is responsible for the creation of an heterogeneous temperature field around the crack tip. A thermomechanical model is proposed in this paper for the theoretical ...