Continuum Mechanics and Thermodynamics最新文献_第10页

Strain-gradient finite elasticity solutions to rigid bar pull-out test 刚性棒拉拔试验的应变梯度有限弹性解法

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-23 DOI: 10.1007/s00161-024-01285-5

Nasrin Rezaei, M. Erden Yildizdag, Emilio Turco, Anil Misra, Luca Placidi

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Experimental studies and the model of anisotropic plasticity for additively manufactured stainless steel with stress state dependent properties 各向异性塑性的实验研究和应力状态依赖性添加制造不锈钢模型

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-22 DOI: 10.1007/s00161-024-01286-4

Alexey Fedorenko, Boris Fedulov, Stanislav Evlashin, Oleg Staroverov, Alexander Pankov, Svetlana Shalnova, Evgeny Lomakin

{"title":"Experimental studies and the model of anisotropic plasticity for additively manufactured stainless steel with stress state dependent properties","authors":"Alexey Fedorenko, Boris Fedulov, Stanislav Evlashin, Oleg Staroverov, Alexander Pankov, Svetlana Shalnova, Evgeny Lomakin","doi":"10.1007/s00161-024-01286-4","DOIUrl":"10.1007/s00161-024-01286-4","url":null,"abstract":"<div><p>In this study the mechanical anisotropy of laser powder bed fusion (LPBF) 316L stainless steel under tensile, compressive, and shear loading in different orientations with respect to the build direction is investigated. Experimental analysis revealed a moderate degree of anisotropy, which is mainly attributed to the build direction. In addition, the mechanical properties were seen to be dependent on the stress state, as evidenced by the tension-compression asymmetry. The anisotropy and asymmetry can be explained by various microstructural factors with texture orientation being one of the most significant. To incorporate such material behavior in structural analysis, a phenomenological model for anisotropic plasticity and tension-compression asymmetry was proposed and calibrated for additive 316L steel. The flexibility of the model allows it to be applied using a mechanical test set on uniaxial loading, and further enhancements may rely on data for combined stress state. The model was calibrated based on FEA of samples loading and fit well all experimental curves, though factors such as residual stresses and test imperfections could introduce some discrepancies.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 3","pages":"619 - 637"},"PeriodicalIF":1.9,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139938773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wave propagation with two delay times in an isotropic porous micropolar thermoelastic material 具有两个延迟时间的波在各向同性多孔微波热弹性材料中的传播

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-21 DOI: 10.1007/s00161-024-01287-3

D. M. Neagu, I. M. Fudulu, M. Marin, A. Öchsner

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Comparison of the symmetric hyperbolic thermodynamically compatible framework with Hamiltonian mechanics of binary mixtures 对称双曲热力学兼容框架与二元混合物哈密顿力学的比较

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-21 DOI: 10.1007/s00161-024-01281-9

Martin Sýkora, Michal Pavelka, Ilya Peshkov, Piotr Minakowski, Václav Klika, Evgeniy Romenski

{"title":"Comparison of the symmetric hyperbolic thermodynamically compatible framework with Hamiltonian mechanics of binary mixtures","authors":"Martin Sýkora, Michal Pavelka, Ilya Peshkov, Piotr Minakowski, Václav Klika, Evgeniy Romenski","doi":"10.1007/s00161-024-01281-9","DOIUrl":"10.1007/s00161-024-01281-9","url":null,"abstract":"<div><p>How to properly describe continuum thermodynamics of binary mixtures where each constituent has its own momentum? The Symmetric Hyperbolic Thermodynamically Consistent (SHTC) framework and Hamiltonian mechanics in the form of the General Equation for Non-Equilibrium Reversible-Irreversible Coupling (GENERIC) provide two answers, which are similar but not identical, and are compared in this article. They are compared both analytically and numerically on several levels of description, varying in the amount of detail. Namely, a reduction to a more common one-momentum setting is shown, where the effects of the second momentum translate into diffusive fluxes. Both SHTC and GENERIC can thus be interpreted as a method specifying diffusive flux in standard theory. The GENERIC equations, stemming from the Liouville equation, contain terms expressing self-advection of the relative velocity by itself, which lead to a vorticity-dependent diffusion matrix after the reduction. The SHTC equations, on the other hand, do not contain such terms. We also discuss the possibility to formulate a theory of mixtures with two momenta and only one temperature that is compatible with the Liouville equation and possesses the Hamiltonian structure, including Jacobi identity.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 3","pages":"539 - 559"},"PeriodicalIF":1.9,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-024-01281-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139915840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Static bending analysis of a transversely cracked strip tapered footing on a two-parameter soil using a new beam finite element 使用新型梁有限元对双参数土壤上横向开裂的条形锥形基脚进行静态弯曲分析

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-17 DOI: 10.1007/s00161-024-01283-7

Denis Imamović, Matjaž Skrinar

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On the (Lambda )-fractional continuum mechanics fields 关于 $$Lambda $$ - 分数连续介质力学场

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-14 DOI: 10.1007/s00161-024-01282-8

K. A. Lazopoulos, A. K. Lazopoulos

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Thermodynamically extended symplectic numerical simulation of viscoelastic, thermal expansion and heat conduction phenomena in solids 固体粘弹性、热膨胀和热传导现象的热力学扩展交映数值模拟

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-12 DOI: 10.1007/s00161-024-01280-w

Donát M. Takács, Áron Pozsár, Tamás Fülöp

{"title":"Thermodynamically extended symplectic numerical simulation of viscoelastic, thermal expansion and heat conduction phenomena in solids","authors":"Donát M. Takács, Áron Pozsár, Tamás Fülöp","doi":"10.1007/s00161-024-01280-w","DOIUrl":"10.1007/s00161-024-01280-w","url":null,"abstract":"<div><p>Symplectic numerical schemes for reversible dynamical systems predict the solution reliably over large times as well, and are a good starting point for extension to schemes for simulating irreversible situations like viscoelastic wave propagation and heat conduction coupled via thermal expansion occuring in rocks, plastics, biological samples etc. Dissipation error (artificial nonpreservation of energies and amplitudes) of the numerical solution should be as small as possible since it should not be confused with the real dissipation occurring in the irreversible system. In addition, the other well-known numerical artefact, dispersion error (artificial oscillations emerging at sharp changes), should also be minimal to avoid confusion with the true wavy behavior. The continuum thermodynamical aspects (respect for balances with fluxes, systematic constitutive relationships between intensive quantities and fluxes, the second law of thermodynamics with positive definite entropy production, and the spacetime-based kinematic viewpoint) prove valuable for obtaining such extended schemes and for monitoring the solutions. Generalizing earlier works in this direction, here, we establish and investigate such a numerical scheme for one-dimensional viscoelastic wave propagation in the presence of heat conduction coupled via thermal expansion, demonstrating long-term reliability and the applicability of thermodynamics-based quantities in supervising the quality of the solution.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 3","pages":"525 - 538"},"PeriodicalIF":1.9,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-024-01280-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139728177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interplay of surface and bulk elasticity in morphological stability of ultra-thin film coatings 超薄薄膜涂层形态稳定性中表面弹性和主体弹性的相互作用

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-02-06 DOI: 10.1007/s00161-024-01279-3

Gleb Shuvalov, Sergey Kostyrko, Holm Altenbach

引用次数: 0

Investigation of thermomechanical properties of solid rocket propellant used in multi-barrel rocket systems 多管火箭系统中使用的固体火箭推进剂的热力学特性研究

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-01-30 DOI: 10.1007/s00161-023-01277-x

Marcin Cegla, Magdalena Czerwinska, Piotr Kasprzak

{"title":"Investigation of thermomechanical properties of solid rocket propellant used in multi-barrel rocket systems","authors":"Marcin Cegla, Magdalena Czerwinska, Piotr Kasprzak","doi":"10.1007/s00161-023-01277-x","DOIUrl":"10.1007/s00161-023-01277-x","url":null,"abstract":"<div><p>The effectiveness of multi-barrel rocket systems on today’s battlefields is strongly dependent on the reliability of operation and, hence, proper action of all components, especially rockets and propellants. Therefore, the properties of the solid rocket propellants used in the rocket motors must be determined with an efficient and reliable tool providing repeatable results. The article presents the results of a thermomechanical analysis of solid double-base rocket propellant used in multi-barrel rocket systems. One of the recommended methods for testing solid rocket propellants is dynamic mechanical analysis. Mechanical properties such as the dynamic storage modulus <span>((E^prime ))</span>, the dynamic loss modulus <span>((E^{prime prime }),)</span> and the tangent tan<span>((delta ))</span> of the phase shift angle <span>((E^{prime prime }/E^prime ))</span> were measured with the use of the TA Instruments DMA Q 800 device, in a temperature range of − 100 to <span>(+)</span>100 <span>(^circ )</span> C with the use of different frequencies of applied force and heating rates. Special attention was devoted to determining the glass transition temperature following the STANAG 4540 standardization agreement, as well as the influence of testing parameters on the obtained experimental results. Dynamic mechanical analysis has proven to be an effective method for the evaluation of key properties influencing rocket motor behavior.</p></div>","PeriodicalId":525,"journal":{"name":"Continuum Mechanics and Thermodynamics","volume":"36 3","pages":"459 - 469"},"PeriodicalIF":1.9,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00161-023-01277-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139644095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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A second and third gradient material with torsion resulting from the homogenization of a highly contrasted rigid fibre-reinforced composite 高对比度刚性纤维增强复合材料均质化产生的具有扭转的第二和第三梯度材料

IF 1.9 4区工程技术

Continuum Mechanics and Thermodynamics Pub Date : 2024-01-29 DOI: 10.1007/s00161-024-01278-4

Mustapha El Jarroudi

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