Fatigue Equivalent Stress State Approach Validation in Non-conservative Criteria: a Comparative Study

Tchoupou, Kévin M. Tsapi; Fotsing, Bertin D. Soh

doi:10.1590/1679-78251784

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…The lack of regulations clearly attributes the allocation of eventual types of joints to the designer; these are not evidently listed in the standards, into lower, upper, or extra classes when possible (TREMARIN; PRAVIA, 2017). The vast majority of studies in the last 70 years, focused their efforts on the analysis of proportional, phased, and uniaxial stress (TCHOUPOU, 2015).…”

Section: Findley Model (1959)mentioning

confidence: 99%

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Tremarin

Pravia

2020

Lat. Am. j. solids struct.

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This work presents a new computational approach to estimate the fatigue life in welded joints, taking into account three-dimensional, non-proportional, and out-of-phase stresses; the thermomechanical properties of steel; parameters of the welding process; and the effects of residual stresses. We use the mechanical equations of continuous and cumulative fatigue damage found from Multiaxial RainFlow, the Wang and Brown and critical plane methods, and the Findley criteria approach. The numerical finite element method, available with software, is used to simulate the formation of residual stress and quantify its influence by solving equations. Based on the analysis of numerical results, we were able to prevision the crack location and angles of propagation of a high cycle fatigue crack with totally random loads in a metallic structure. We conclude that the result of the computational method is valid and can be used to estimate and life in fatigue in welded joints.

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Section: Findley Model (1959)mentioning

confidence: 99%

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Tremarin

Pravia

2020

Lat. Am. j. solids struct.

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Fatigue Performance Evaluations of Vehicle Toroidal Liquefied Petroleum Gas Fuel Tanks

Kartal

Kişioğlu

2017

Journal of Pressure Vessel Technology

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In this study, fatigue performances of the vehicle toroidal liquefied petroleum gas (LPG) fuel tanks were examined to estimate the fatigue life and its failure locations using both experimental and finite element analysis (FEA) methods. The experimental investigations performed as accelerated fatigue tests were carried out using a hydraulics test unit in which the tanks were internally pressurized by hydraulic oil. The LPG tanks were subjected to repeated cyclic pressure load varying from zero to service pressure (SP) of the tank. The computerized FEA modeling of these tanks were developed in three-dimensional (3D) form using nonuniform geometrical parameters and nonlinear material properties. These models were also subjected to zero-based high cycle fatigue pressure load considering the stress life approach. The FEA modeling process was also simulated in nonhomogeneous material conditions. Therefore, the fatigue life performance and failure location of the toroidal LPG fuel tanks were predicted using the computer-aided simulations and compared with the experimental results.

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Probability Analysis in Determining the Behaviour of Variable Amplitude Strain Signal Based on Extraction Segments

Yunoh

Abdullah

Saad

et al. 2017

Lat. Am. j. solids struct.

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This paper focuses on analysis in determining the behaviour of variable amplitude strain signals based on extraction of segments. The constant Amplitude loading (CAL), that was used in the laboratory tests, was designed according to the variable amplitude loading (VAL) from Society of Automotive Engineers (SAE). The SAE strain signal was then edited to obtain those segments that cause fatigue damage to components. The segments were then sorted according to their amplitude and were used as a reference in the design of the CAL loading for the laboratory tests. The strain signals that were obtained from the laboratory tests were then analysed using fatigue life prediction approach and statistics, i.e. Weibull distribution analysis. Based on the plots of the Probability Density Function (PDF), Cumulative Distribution Function (CDF) and the probability of failure in the Weibull distribution analysis, it was shown that more than 70% failure occurred when the number of cycles approached 1.0 x 10 11 . Therefore, the Weibull distribution analysis can be used as an alternative to predict the failure probability.

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Fatigue Equivalent Stress State Approach Validation in Non-conservative Criteria: a Comparative Study

Cited by 3 publications

References 14 publications

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Fatigue Performance Evaluations of Vehicle Toroidal Liquefied Petroleum Gas Fuel Tanks

Probability Analysis in Determining the Behaviour of Variable Amplitude Strain Signal Based on Extraction Segments

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