... evaluation under elevated temperature NOMECLATURE condition. : Number of cycles to failure Keywords: Elevated temperature design, Gr.91, Fatigue life 2 : with design factor of 2 on strain range INTRODUCTION 20 : with design factor of 20 on the cycles Grade 91 steel (hereafter Gr.91) has been used...

... the service process of the gas cylinder leads to the expansion of initial cracks inside the cylinder and the final fatigue fracture. At present, the fatigue life calculation of pressure vessels mainly adopts the S-N curve method, however, some steels do not have the S-N curve under the hydrogen environment...

... and polynomial-approximated approach from GB/T 34019 Ultra-high pressure vessels. Then, a comparative study has been made from the results of above methods to find out the difference between them. At last, the fatigue life of a 4130X steel hydrogen storage vessel has been predicted based on linear elastic...

...Abstract Abstract Influence of the mean stress on fatigue life and fatigue limit was investigated for carbon steel. Uni-axial fatigue tests were conducted under stress and strain-controlled conditions at room temperature. The fatigue life and fatigue limit were reduced by applying the mean...

... for a crack in a cylindrical specimen typically used for fatigue life testing and generating design fatigue curves. The specimen is uniaxially displacement-loaded into the plastic regime, and the reaction force is evaluated as a function of crack depth and shape. Cyclic loading leads to formation of a crack...

..., aerospace, and nuclear industry. Likewise, fatigue life estimation for such components is fundamental to verify the design robustness assuring structural integrity throughout service. The linear damage accumulation model (Palmgren-Miner rule) is still largely used for damage assessment on fatigue...

...TIME-SERIES FATIGUE DAMAGE STATES FORECASTING AND PROBABILISTIC ENVIRONMENTAL FATIGUE LIFE PREDICTION USING MARKOV-CHAIN-MONTE-CARLO TECHNIQUES Jae Phil Park Pusan National University Busan, Republic of Korea Email: jppark@pusan.ac.kr Subhasish Mohanty1 Argonne National Laboratory Lemont, IL, USA...

...MEAN STRESS CORRECTION FOR FATIGUE LIFE OF CARBON STEEL: PROPOSAL OF NON-CLOSURE MODEL Masayuki Kamaya1 Institute of Nuclear Safety System, Inc. 64 Sata, Mihama-cho, Fukui 919-1205, JAPAN ABSTRACT Influence of the mean stress on fatigue life was investigated for carbon steel. Uni-axial fatigue...

... stretched pressure vessel. Keyword: cold stretched austenitic stainless steel, low cycle fatigue properties, fatigue life, S-N curve INTRODUCTION Cold stretched pressure vessels from austenitic stainless steel (ASS) have been widely used for storage and transportation of liquefied gases due...

... are determined using the ordinary engineering design method, Design by Analysis (DBA) shows that the requirement on fatigue life of this unique UHPV could hardly be satisfied. To solve the above problem, an integrated FE modeling method has been proposed in this paper. To investigate the fatigue life of TLQA...

... 15 08 2008 Computer Aided Design and Finite Element Analysis packages that have been developed are capable of providing a relatively accurate fatigue life prediction. These software packages have made nonlinear analysis more reliable in forecasting a component’s fatigue life. A safe...

... Division Conference July 17-21, 2005, Denver, Colorado USA PVP2005-71493 1 Copyright © by ASME Keywords: Low cycle fatigue, hardening, dynamic strain aging, fatigue life INTRODUCTION Fatigue is one of the most significant failure modes in nuclear power plants. It has been reported that fatigue failures...

..., Tsutsumi, Higuchi and Leax. ese models are statistically compared by subset. Y WORDS inless Steel, Fatigue life, Air, Water RODUCTION Several studies(1-30) have been made to determine the igue behavior of Austenitic stainless steels at various peratures, in air and in BWR and PWR water. The liest(2...

... in keeping with the predictions of these models. This difference was ascribed to the effect of the PWR water, in the absence of significant initial straining and secondary hardening. Stainless Steel Fatigue life Mean Stress Air Water Proceedings of 2005 ASME PVP Conference: Environmental...