Characterization of innovative CFC/Cu joints by full-field measurements and finite elements

Fedele, Roberto; Ciani, Antonia; Galantucci, Luca; Casalegno, Valentina; Ventrella, Andrea; Ferraris, Monica

doi:10.1016/j.msea.2013.12.015

Cited by 27 publications

(5 citation statements)

References 21 publications

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“…It is worth considering that, once the furnace has cooled down, a solidified droplet joined to the substrate becomes available. Non conventional mechanical experiments, referred to as push off tests (see e.g., [34]), can be carried out also on such a system, to assess the average shear strength of the joint and its fracture energy, for instance by means of full field kinematic data and inverse analyses [35][36][37]. X-ray imaging can still be utilized to monitor the experiment at room temperature, if an in situ loading apparatus is available.…”

Section: Discussionmentioning

confidence: 99%

Analysis, Design and Realization of a Furnace for In Situ Wettability Experiments at High Temperatures under X-ray Microtomography

et al. 2021

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In this study, we analyzed the problem of a compact furnace, to be used for in situ experiments in a cone-beam X-ray microtomography commercial system. The design process was accomplished and outlined through its main steps, until the realization of a prototype. The furnace was conceived to carry out wettability experiments at temperatures up to 700 °C and under inert atmosphere on sessile droplets of a molten metal alloy, with a few millimeters diameter, posed on a thin ceramic substrate. X-ray imaging of the molten droplet is expected to permit an accurate three-dimensional reconstruction of the droplet profile and a robust estimation of the related quantities (such as the contact angle and the surface tension) utilized for the assessment of metal-ceramic joints by brazing. The challenges faced during this project, mostly related to the constraints of the setup, and the novel solutions implemented were discussed also with the support of analytical and numerical tools, in terms of interaction of X-rays with matter, geometry and working principle, heat transfer and insulation, material selection.

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Section: Discussionmentioning

confidence: 99%

Analysis, Design and Realization of a Furnace for In Situ Wettability Experiments at High Temperatures under X-ray Microtomography

et al. 2021

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“…Topics still under development concern the transport of external loading from the Lagrangian to the Eulerian configuration (and vice versa), a priori conditions on the energy density under which loading contributions satisfy prescribed requirements, mixed numerical-experimental methodologies capable of distinguishing kinematic fields at different scales, see e.g. [12,13,14].…”

Section: Closing Remarks and Future Prospectsmentioning

confidence: 99%

Which kind of external loading second gradient materials can sustain?

Fedele,

dell’Isola,

Seppecher

et al. 2023

AIP Conference Proceedings

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In this communication, materials are considered whose deformation energy depends on both first and second gradient of placement map. When deriving the equilibrium equations by a variational approach, through integration by parts and the reiterated application of the divergence theorem, the class of external loading which are admissible for second gradient materials can be easily identified. Discrepancies with respect to Cauchy's first gradient continua are highlighted, with special reference to the double forces acting over the boundary faces and the edge loading.

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“…The theoretical results about higher gradient continua have been exploited to design experiments involving multi-scale 3D printed micro-architectures: correspondingly suitable multiscale Digital Image Correlation procedures have been conceived, both using images of a free surface (2D DIC) or within the bulk (Digital Volume Correlation DVC) (see e.g. [32][33][34][35]): this circumstance proves the importance in the engineering applications of generalized continuum theories.…”

Section: Meta-materials Architectures and Higher Gradient Continuum M...mentioning

confidence: 99%

Irreducible representation of surface distributions and Piola transformation of external loads sustainable by third gradient continua

Dell’Isola¹,

Fedele²

2023

Comptes Rendus. Mécanique

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The French "Année de la Mécanique": some views on recent advances in solid and fluid mechanics / L'année de la mécanique : quelques points de vue sur des avancées récentes en mécanique des solides et des fluides Irreducible representation of surface distributions and Piola transformation of external loads sustainable by third gradient continua Représentation irréductible des distributions surfaciques et transformation de Piola des charges externes soutenables par un continuum de troisième gradient

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Characterization of innovative CFC/Cu joints by full-field measurements and finite elements

Cited by 27 publications

References 21 publications

Analysis, Design and Realization of a Furnace for In Situ Wettability Experiments at High Temperatures under X-ray Microtomography

Analysis, Design and Realization of a Furnace for In Situ Wettability Experiments at High Temperatures under X-ray Microtomography

Which kind of external loading second gradient materials can sustain?

Irreducible representation of surface distributions and Piola transformation of external loads sustainable by third gradient continua

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