MODELLING OF STRESS GRADIENT EFFECT ON FATIGUE LIFE USING WEIBULL BASED DISTRIBUTION FUNCTION
TypeArticles dans des revues avec comité de lecture
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
Showing items related by title, author, creator and subject.
Thermal effect of plastic dissipation at the crack tip on the stress intensity factor under cyclic loading RANC, Nicolas; PALIN-LUC, Thierry; PARIS, Paul C. (Elsevier, 2011)Plastic 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 ...
Residual stresses in surface induction hardening of steels: Comparison between experiment and simulation COUPARD, Dominique; PALIN-LUC, Thierry; BRISTIEL, Philippe; JI, Vincent; DUMAS, Christian (Elsevier, 2008)Deep induction hardening has been performed on two batches of smooth cylindrical specimens with a hardening depth respectively around 2 mm and 3 mm. The distributions of axial and circumferential residual stresses are ...
WANG, Qingyuan; PALIN-LUC, Thierry (Wiley, 2015)This issue of Fatigue and Fracture Engineering Materials and Structures international journal presents a selection of some extended version of papers presented at the 6th International Conference on Very High Cycle Fatigue. ...
Overload effects on a ferritic-baintic steel and a cast aluminium alloy: two very different behaviours SAINTIER, Nicolas; PALIN-LUC, Thierry; EL DSOKI, C.; BIDOUARD, Hadrien; KAUFMANN, Heinz; DUMAS, C.; VÖLLMECKE, F.J.; SONSINO, Cetin Morris (Wiley, 2011)Load controlled fatigue tests were performed up to 107 cycles on flat notched specimens (Kt =2.5) under constant amplitude and variable amplitude loadings with and without periodical overloads. Two materials are studied: ...
PARIS, Paul C.; PALIN-LUC, Thierry (Elsevier, 2009)Crack stability is discussed as affected by their presence in statically-indeterminate beams, frames, rings, etc. loaded into the plastic range. The stability of a crack in a section, which has become plastic, is analyzed ...