Continuous-time, high-cycle fatigue model for nonproportional stress with validation for 7075-T6 aluminum alloy

Lindström, Stefan B.

doi:10.1016/j.ijfatigue.2020.105839

Cited by 16 publications

(10 citation statements)

References 15 publications

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“…In the principal stress space, the equation tr(σ) = 0 denes a deviatoric plane with a normal vector n = 1 1 1 T . Since s and α are deviatoric, they lie on the deviatoric plane and the endurance surface intersects the deviatoric plane along the circle [7] illustrates the situation. Remark 2.…”

Section: Evolution Equation Based Continuum Modelmentioning

confidence: 95%

“…g(β, D) = g −1 1 (D)g 2 (β), then a change of the damage variable yields the OSR type damage rule, cf. [6,7,8].…”

Section: Evolution Equation Based Continuum Modelmentioning

confidence: 99%

“…Parameters of the initial value curve for some materials Remark 5. In[7], Lindström characterized the back-stress as follows: We can understand the presence of a back-stress as inelastic deformation associated with microdamage in individual grains or grain boundary segments.…”

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confidence: 99%

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Some observations on the numerical solution of the Ottosen-Stenström-Ristinmaa high-cycle fatigue model

Kaleva

Orelma

2022

RakMek

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Some years ago, Ottosen, Stenström and Ristinmaa introduced a high-cycle fatigue model based on the continuum approach. The model is formulated as a fully implicit differential equation and an ordinary differential equation. The corresponding numerical solutions are compared. We demonstrate pitfalls in the process so that appliers are able to avoid these problems. Especially,we show that the results depend on the initial value of the evolution equation. We propose a method to choose such an initial value that the estimated Wöhler curve fits the measured data.

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Section: Evolution Equation Based Continuum Modelmentioning

confidence: 95%

“…g(β, D) = g −1 1 (D)g 2 (β), then a change of the damage variable yields the OSR type damage rule, cf. [6,7,8].…”

Section: Evolution Equation Based Continuum Modelmentioning

confidence: 99%

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Some observations on the numerical solution of the Ottosen-Stenström-Ristinmaa high-cycle fatigue model

Kaleva

Orelma

2022

RakMek

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“…The focus of this thesis is on utilizing a continuous-time high-cycle fatigue (HCF) model proposed by Holopainen et al [21], Lindström [31], Ottosen et al [38] as a constraint in TO problems. This HCF model has the ability to handle proportional and non-proportional loads without the need for a cycle-counting algorithm.…”

Section: To Developments For Hcfmentioning

confidence: 99%

“…This technique is employed to expedite the overall fatigue process and sensitivity analysis, thereby enabling the handling of an unlimited number of load cycles. While in Paper IV, the fatigue model by Lindström [31], Lindström et al [33] is used, which takes a quadratic endurance function. This ensures a better prediction and extrapolation capabilities of fatigue-damage, especially for non-proportional loads.…”

Section: Continuous-time Fatigue Modelmentioning

confidence: 99%

Developments of Topology Optimization Methods for Additive Manufacturing involving High-cycle Fatigue

Suresh

2023

Linköping Studies in Science and Technology. Dissertations

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This Doctoral thesis builds upon the research conducted in my Licentiate thesis [45], and was carried out at the division of Solid Mechanics in Linköping University. The work was performed within the Centre for Additive Manufacturing-Metal (CAM 2 ), which was funded by Sweden's Innovation Agency through grant agreement No 2016-05175.I wish to extend my heartfelt appreciation to my primary supervisor, Professor Anders Klarbring and my co-supervisors, Dr. Stefan Lindström, Dr. Carl-Johan Thore, and Dr. Bo Torstenfelt, for their unwavering support, guidance, and expertise throughout this project. Their invaluable feedback, encouragement, and patience were instrumental in my research and writing process.Additionally, I am grateful to all my colleagues at Linköping University for their support and engaging conversations, both related to work and other topics.Finally, I am deeply grateful to my family, my lovely wife Priya and our daughter Rithu, for all their unconditional support and sacrifices they have made for my life in general.

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Machinability and cutting force modeling of 7055 aluminum alloy with wide temperature range based on dry cutting

Zhang

Cao

Zhang

et al. 2020

Int J Adv Manuf Technol

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Continuous-time, high-cycle fatigue model for nonproportional stress with validation for 7075-T6 aluminum alloy

Cited by 16 publications

References 15 publications

Some observations on the numerical solution of the Ottosen-Stenström-Ristinmaa high-cycle fatigue model

Some observations on the numerical solution of the Ottosen-Stenström-Ristinmaa high-cycle fatigue model

Developments of Topology Optimization Methods for Additive Manufacturing involving High-cycle Fatigue

Machinability and cutting force modeling of 7055 aluminum alloy with wide temperature range based on dry cutting

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