Crack initiation under thermal fatigue: An overview of CEA experience: Part II (of II): Application of various criteria to biaxial thermal fatigue tests and a first proposal to improve the estimation of the thermal fatigue damage |
| |
| Authors: | A Fissolo C Gourdin O Ancelet S Amiable A Demassieux S Chapuliot N Haddar F Mermaz JM Stelmaszyk A Constantinescu L Vincent V Maillot |
| |
| Affiliation: | 1. Commissariat à l’Energie Atomique – Saclay, Département de Modélisation de Systèmes et Structures/Service d’Etudes Mécaniques et Thermiques/Laboratoire d’Intégrité des Structures et de Normalisation Bat 607, 91191 Gif sur Yvette Cédex, France;2. Ecole Polytechnique, Laboratoire de Mécanique des Solides – CNRS UMR 7649, École Polytechnique, 91128 Palaiseau cedex, France;3. Ecole Supérieure des Mines de Paris, Ecole Nationale d’Ingénieur de Sfax, B.P W.3038, Sfax Tunisie, Tunisia;4. Institut de Radioprotection et de Sûreté Nucléaire, BP17 – 92262 Fontenay-aux-Roses Cedex, France;5. Commissariat à l’Energie Atomique – Saclay, Service de Recherches Métallurgiques Appliquées/Laboratoire du Comportement et du Dommage Bat 455, 91191 Gif sur Yvette Cédex, France;1. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;2. Graduate School of Engineering, Tohoku University, Sendai 980-8577, Japan;1. School of Aerospace Engineering, Tsinghua University, Beijing, China;2. Department of Civil Engineering, Technical University of Darmstadt, Germany;1. Manufacturing Demonstration Facility, Oak Ridge National Laboratory, Knoxville, TN, United States;2. Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States;1. University of Fukui, Division of Engineering, 3-9-1 Bunkyo, Fukui-shi, Fukui 910-8507, Japan;2. Ritsumeikan University, Department of Mechanical Engineering, 1-1-1 Noji-higashi, Kusatsu-shi, Shiga 525-8577, Japan;3. Kobe Material Testing Laboratory Co., Ltd, 47-13 Niijima, Harima-cho, Hyogo 675-0155, Japan;1. Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow G1 1XJ, United Kingdom;2. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China |
| |
| Abstract: | A Part I accompanying paper clearly showed that for a given level of strain range (Δ?), the number of cycles required to achieve crack initiation is significantly lower in biaxial thermal fatigue than in uniaxial isothermal fatigue.Such discrepancy does not come from a thermal effect, as it is emphasized by a comparison between the uniaxial data, coming either from thermomechanical fatigue tests, or from isothermal low cycle fatigue tests. A detrimental effect of multiaxial loading on fatigue life is noticed in many cases as reported in the literature.In this frame, the goal of this paper is to propose criteria in order to take into account the reduction of fatigue life resulting from the multiaxiality. Among all the examined multiaxial criteria, a criterion based on strain proposed by Zamrik, and a new criterion based on energy proposed by “Ecole Polytechnique” give the best estimations. Furthermore, application of the Zamrik’s criterion using the RCC–MR method is very promising for the design engineer. Indeed, these two criteria exhibit a notable potential, since they are well adapted to all the available thermal fatigue experimental data, despite significant differences between approaches and processes developed by both accessible facilities.However, such investigation must be continued with achievement of additional thermal fatigue tests (for higher number of cycles…), and isothermal biaxial fatigue tests. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
