Experimental and numerical investigations of the warm-prestressing (WPS) effect considering different load paths

Kordisch, H.; Böschen, R.; Blauel, J.G.; Schmitt, W.; Nagel, Gerhard

doi:10.1016/s0029-5493(99)00282-4

Cited by 21 publications

(16 citation statements)

References 7 publications

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“…As mentioned above, to apply the Beremin approach to description of the TPL effect it should first be modified [4,14]. In essence, such modification amounts to a priori introducing the following additional constraint: brittle fracture in a material may occur only when plastic deformation is active.…”

Section: Notementioning

confidence: 99%

“…Therefore, to solve problems of this type, in particular for modeling thermomechanical pre-loading (TPL), the Beremin approach was further modified as follows [14]. It is suggested that fracture may only happen when plastic deformation is active, and the brittle fracture probability is governed by the highest value of maximum principal stress throughout the loading history rather than by its current value.…”

mentioning

confidence: 99%

“…It is suggested that fracture may only happen when plastic deformation is active, and the brittle fracture probability is governed by the highest value of maximum principal stress throughout the loading history rather than by its current value. Investigations demonstrated that the Beremin approach does not provide good predictions in the case of non-isothermal non-monotonic loading (TPL was modeled in the LUCF mode, i.e., loading-unloading-cooling-fracturing) either [14]. It is only in the case of non-isothermal but monotonic loading (an LCF mode, i.e., loading-cooling-fracturing) that the Beremin approach gives more or less adequate estimates.…”

mentioning

confidence: 99%

“…Stockl et al [15] put forward another modification of the Beremin approach which involved a more detailed description of the brittle fracture process in comparison to the classical [9] and modified [4,14] versions. Many of the physical concepts taken in [15] are essentially very close to those described earlier in [16,17].…”

mentioning

confidence: 99%

“…When using formula (14), allowance must be made for the fact that the local stress σ loc increases monotonically only in the case of monotonic loading or, in the case of non-monotonic loading, if no plastic deformation is realized at unloading segments. If in the case of non-monotonic loading plastic deformation is reversed at the unloading stage, the dislocation cluster formed at the direct loading stage is partially dispersed and partially blocked by "branching" of dislocations.…”

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confidence: 99%

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Probabilistic definition of local criterion for brittle fracture under complex thermomechanical loading

2005

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The new local criterion for brittle fracture in probabilistic definition, which was used by the authors earlier for the K Ic (T) prediction, is modified for the case of non-isothermal non-monotonic loading. An approach is put forward which allows predicting the brittle fracture probability for cracked elements under complex thermomechanical loading typical, for example, of the case of emergency cooldown of a reactor pressure vessel. The approach has been verified by comparing the calculated and experimental data of assessment of the influence of various thermomechanical pre-loading modes on the fracture toughness of reactor pressure vessel steels.

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Section: Notementioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Probabilistic definition of local criterion for brittle fracture under complex thermomechanical loading

2005

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The prospect of modern thermomechanics in structural integrity calculations of large-scale pressure vessels

Fekete

2018

Continuum Mech. Thermodyn.

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Using Thermomechanical Conditioning Cycles to Improve Fracture Toughness of Low Carbon Steel

Ibrahim

Raman

et al. 2009

Metall Mater Trans A

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The improvement of material toughness has significant industrial applications. In this article, the thermomechanical conditioning (TMC) cycle (which involves simultaneous application of heat to a moderate temperature combined with a tensile load, followed by unloading and cooling to room temperature) was used to improve the fracture toughness of the material. Apparent fracture toughness (K a ) is denoted to represent the fracture toughness of cracked components after the application of TMC cycles. The TMC cycles result in a significant increase in the apparent fracture toughness (K a ) of AS 1548 grade 7-460R steel as compared to the fracture toughness (K IC ) of the original material. It is found that the improvement in the apparent fracture toughness of the material was due to the increase in plastic strain and the plastic zone size ahead of the crack tip that occurred after applying TMC. In this study, both the apparent and original fracture toughness (K a and K IC ) are evaluated using the cylindrical notched tensile (CNT) technique, which is considerably cost effective over the standard compact tension specimens (ASTM E399).

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Experimental and numerical investigations of the warm-prestressing (WPS) effect considering different load paths

Cited by 21 publications

References 7 publications

Probabilistic definition of local criterion for brittle fracture under complex thermomechanical loading

Probabilistic definition of local criterion for brittle fracture under complex thermomechanical loading

The prospect of modern thermomechanics in structural integrity calculations of large-scale pressure vessels

Using Thermomechanical Conditioning Cycles to Improve Fracture Toughness of Low Carbon Steel

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