Homogenized elastic–viscoplastic behavior of plate-fin structures at high temperatures: Numerical analysis and macroscopic constitutive modeling

Tsuda, Makoto; Takemura, Eri; Asada, Takashi; Ohno, Nobutada; Igari, Toshihide

doi:10.1016/j.ijmecsci.2009.06.007

Cited by 48 publications

(32 citation statements)

References 25 publications

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“…Brazed compact plate-fin heat exchangers (PFHE) with high efficiency are expected to be used as recuperator and intermediate heat exchanger for high temperature gas reactor (HTGR) [1,2]. The core of this heat exchanger is a porous structure with a number of brazed joints.…”

Section: Introductionmentioning

confidence: 99%

Notch effect on creep damage for Hastelloy C276-BNi2 brazing joint

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Notch effect on creep damage for Hastelloy C276-BNi2 brazing joint

et al. 2015

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“…Designing a microstructure to obtain certain desired macroscopic properties in cellular materials is a new approach that was recently introduced to the structural engineering mechanics field due to the abundant research into multi-scale modelling. Numerous studies are available on multi-scale analysis in the context of the approximation of an effective elastic constant of heterogeneous media; these studies are based on periodic homogenisation theory (Bensoussan et al 1978, Sánchez-Palencia 1980, Guedes and Khairul Salleh Basaruddin Kikuchi 1990), specifically in the scope of fibre-reinforced composites (Terada et al 2000, Matsuda et al 2003 and cellular materials, such as honeycomb (Guedes and Kikuchi 1990), plate-fin (Tsuda et al 2010) and wafer-fin structures (Saha et al 2007). In addition to periodic microstructure, one study has demonstrated the accuracy of homogenisation theory even for random microstructures by comparison with experimental results from porous media (Takano et al 2003(Takano et al , 2010.…”

Section: Introductionmentioning

confidence: 99%

Stochastic multi-scale analysis of homogenised properties considering uncertainties in cellular solid microstructures using a first-order perturbation

Basaruddin

Kamarrudin

Ibrahim

2014

Lat. Am. j. solids struct.

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Randomness in the microstructure due to variations in microscopic properties and geometrical information is used to predict the stochastically homogenised properties of cellular media. Two stochastic problems at the micro-scale level that commonly occur due to fabrication inaccuracies, degradation mechanisms or natural heterogeneity were analysed using a stochastic homogenisation method based on a first-order perturbation. First, the influence of Young's modulus variation in an adhesive on the macroscopic properties of an aluminium-adhesive honeycomb structure was investigated. The fluctuations in the microscopic properties were then combined by varying the microstructure periodicity in a corrugated-core sandwich plate to obtain the variation of the homogenised property. The numerical results show that the uncertainties in the microstructure affect the dispersion of the homogenised property. These results indicate the importance of the presented stochastic multi-scale analysis for the design and fabrication of cellular solids when considering microscopic random variation.

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“…Tsuda et al [13] studied the homogenised elasto-viscoplastic behaviour of an ultra-fine plate-fin structure that was produced for compact heat exchanger cores [14]. They analysed the homogenised elasto-viscoplastic behaviour at high temperature using a fully implicit incremental homogenisation scheme [15].…”

Section: Introductionmentioning

confidence: 99%

Homogenised elasto-viscoplastic material modelling of thick perforated plates at high temperature

Ikenoya

Ohno

Kasahara

2012

Materials at High Temperatures

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In this study, homogenised elasto-viscoplastic behaviour of thick perforated plates at high temperature was investigated for macro-material modelling. Homogenised stress -strain relations of a periodic unit cell of thick perforated plates subjected to simple and complex loading were analysed using a homogenisation method for periodic solids. The base metals of perforated plates were assumed to exhibit elasto-viscoplasticity based on Hooke's law and Norton's power-law, and the material parameters of modified 9Cr -1Mo steel at 550 C were employed. The resulting homogenised stress -strain relations were simulated using a recently developed elasto-viscoplastic macro-material model based on a general form of the quadratic equivalent stress. It has been shown that this macromodel successfully represents the macro-anisotropy and macro-volumetric compressibility that were revealed by the homogenisation analysis in uniaxial, biaxial and triaxial stress states.Keywords: homogenised behaviour, macro-material model, thick perforated plates, viscoplasticity, modified 9Cr -1Mo steel, high temperature 322

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Homogenized elastic–viscoplastic behavior of plate-fin structures at high temperatures: Numerical analysis and macroscopic constitutive modeling

Cited by 48 publications

References 25 publications

Notch effect on creep damage for Hastelloy C276-BNi2 brazing joint

Notch effect on creep damage for Hastelloy C276-BNi2 brazing joint

Stochastic multi-scale analysis of homogenised properties considering uncertainties in cellular solid microstructures using a first-order perturbation

Homogenised elasto-viscoplastic material modelling of thick perforated plates at high temperature

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