LISA — a European project for FEM-based limit and shakedown analysis

Staat, Manfred; Heitzer, M.

doi:10.1016/s0029-5493(00)00415-5

Cited by 51 publications

(28 citation statements)

References 13 publications

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“…This is also typically observed in structural shakedown analyses (see e.g. the interaction diagram of a pipe junction in Staat and Heitzer, 2001). …”

Section: Materials Shakedown Analysissupporting

confidence: 58%

Shakedown and ratchetting under tension–torsion loadings: analysis and experiments

Heitzer

Staat

Reiners

et al. 2003

Nuclear Engineering and Design

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SUMMARYStructural design analyses are conducted with the aim of verifying the exclusion of ratchetting. To this end it is important to make a clear distinction between the shakedown range and the ratchetting range. The performed experiment comprised a hollow tension specimen which was subjected to alternating axial forces, superimposed with constant moments. First, a series of uniaxial tests has been carried out in order to calibrate a bounded kinematic hardening rule. The load parameters have been selected on the basis of previous shakedown analyses with the PERMAS code using a kinematic hardening material model. It is shown that this shakedown analysis gives reasonable agreement between the experimental and the numerical results. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis.

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“…This is also typically observed in structural shakedown analyses (see e.g. the interaction diagram of a pipe junction in Staat and Heitzer, 2001). …”

Section: Materials Shakedown Analysissupporting

confidence: 58%

Shakedown and ratchetting under tension–torsion loadings: analysis and experiments

Heitzer

Staat

Reiners

et al. 2003

Nuclear Engineering and Design

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“…s E ðx; tÞ ¼ s E ðxÞ in (6)) effectively with optimization algorithms [8,9]. A large a s can be used to improve the design.…”

Section: Check Against Global Plastic Deformation (Gpd)mentioning

confidence: 99%

Direct finite element route for design-by-analysis of pressure components

Staat

Heitzer

Lang

et al. 2005

International Journal of Pressure Vessels and Piping

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In the new European standard for unfired pressure vessels, EN 13445-3, there are two approaches for carrying out a Design-by-Analysis that cover both the stress categorization method (Annex C) and the direct route method (Annex B) for a check against global plastic deformation and against progressive plastic deformation. This paper presents the direct route in the language of limit and shakedown analysis. This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for mechanical and thermal actions. One observation from the examples is that the so-called 3f (3Sm) criterion fails to be a reliable check against progressive plastic deformation. Precise conditions are given, which greatly restrict the applicability of the 3f criterion.

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“…Abdalla et al proposed a simplified technique to predict the ratcheting boundary of elbow piping [6]. Many other researchers developed a range of mathematical programming methods to calculate the shakedown limit and limit load, including Maier [7], Staat and Heitzer [8], Liu and Carvelli [9], etc. And other methods, including Uniform Modified Yield (UMY) surface method [10], the Generalized Local Stress Strain (GLOSS) r-node method [11], the Reduced Modulus Method [12], the Elastic Compensation Method (ECM) [13,14], and the Linear Matching Method (LMM) [15][16][17][18][19], were raised for determining limit load, shakedown and ratcheting boundary of structure components.…”

Section: Introductionmentioning

confidence: 99%

Cyclic plasticity behaviors of steam turbine rotor subjected to cyclic thermal and mechanical loads

Zhu

Chen²,

Xuan

et al. 2017

European Journal of Mechanics - A/Solids

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This version is available at https://strathprints.strath.ac.uk/61706/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the AbstractIn this paper, shakedown and ratchet analyses are performed to investigate the cyclic plasticity behaviors of the steam turbine rotor subjected to cyclic thermal and mechanical loads by employing Linear Matching Method (LMM). Traditionally, the shakedown or ratchet analysis mainly focus on the structure under general cyclic loading condition composed by constant mechanical load and cyclic thermal load, but the investigated steam turbine rotor here is subjected to cyclic mechanical load and cyclic thermal load that vary in phase and out of phase throughout the practical operation load cycle.The failure behaviours of structure under practical operation load cycle is studied and discussed. The novel shakedown and ratchet failure diagrams are plotted by calculating different combinations of cyclic mechanical load and cyclic thermal load. The innovative equation to acquire plastic strain range of the structure under steady state cycle is fitted, which is vital for low cycle fatigue (LCT) assessment.Moreover, detailed step-by-step inelastic analyses are also performed to verify the applicability and effectiveness of the limit boundaries calculated by the LMM. All the investigations demonstrate that the proposed LMM technique is capable of handling practical industrial application with complicated cyclic loads.

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LISA — a European project for FEM-based limit and shakedown analysis

Cited by 51 publications

References 13 publications

Shakedown and ratchetting under tension–torsion loadings: analysis and experiments

Shakedown and ratchetting under tension–torsion loadings: analysis and experiments

Direct finite element route for design-by-analysis of pressure components

Cyclic plasticity behaviors of steam turbine rotor subjected to cyclic thermal and mechanical loads

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