Multi-phase homogenization procedure for estimating the mechanical properties of shot-earth materials

Bacciocchi, Michele; Savino, V.; Lanzoni, Luca; Tarantino, Angelo Marcello; Viviani, M.

doi:10.1016/j.compstruct.2022.115799

Cited by 15 publications

(5 citation statements)

References 31 publications

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“…For the sake of clarity, SE mix-design presented in the previous work was obtained by using 0.5 vol of excavated soil, 0.5 vol of coarse sand and 12% of cement by weight of the dry mixture. Further details about the features of the excavated soil and coarse sand used in this experimental program are reported in [26]. During the projection of SE 3% by volume of water was injected into the nozzle to promote cohesion and hydration of the cement present in SE.…”

Section: Design Of the Pe Mixturementioning

confidence: 99%

“…Increasing the compaction energy is another method of improving the strength of earthen materials [24]. Recently, a novel excavation-based construction material called "Shot-earth" (hereafter labeled "SE") has been introduced as an alternative earth-based solution that overcomes the typical drawbacks of traditional earthen materials such as water sensitivity and low mechanical strength [25,26]. SE is an ecological composite material that consists of a high percentage of soil excavated from a construction site, locally sourced coarse sand (0-16 mm in size), and a small amount of stabilizer if required.…”

Section: Introductionmentioning

confidence: 99%

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Changing the approach to sustainable constructions: An adaptive mix-design calibration process for earth composite materials

Franciosi

Savino

Lanzoni

et al. 2023

Composite Structures

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Section: Design Of the Pe Mixturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Changing the approach to sustainable constructions: An adaptive mix-design calibration process for earth composite materials

Franciosi

Savino

Lanzoni

et al. 2023

Composite Structures

Self Cite

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“…For instance, Cai et al 21 demonstrated the application of a two-step mean-field homogenization and classical laminate theory procedures to effectively predict the elastic modulus of foamed long glass fiber-reinforced polypropylene. In addition, Bacciocchi et al 22 predicted the overall elastic properties of shot-earth, a sustainable composite material, using a multi-phase mean-field homogenization procedure. As for Kudimova et al 23 , they presented FE homogenization methods to calculate the effective material properties of piezoelectric composites.…”

Section: Introductionmentioning

confidence: 99%

Integrated computational modeling of large format additive manufacturing: Developing a digital twin for material extrusion with carbon fiber-reinforced acrylonitrile butadiene styrene

Castelló-Pedrero,

García-Gascón,

Bas-Bolufer

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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Material extrusion (MEX) continues to be a pivotal additive manufacturing (AM) process, involving the selective heating and layer-by-layer deposition of material. However, conventional finite-element models (finite-element analysis) face limitations in accurately simulating the MEX process, highlighting the need for experimental validation. This paper highlights an advanced material modeling technology that streamlines the development of composite parts using large format AM (LFAM). It specifically focuses on a thermoplastic acrylonitrile butadiene styrene (ABS) matrix composite material enriched with 20% short carbon fibers. The study employs integrated computational materials engineering, integrating (i) the manufacturing process, (ii) the material’s microstructure, (iii) homogenization techniques, and (iv) the performance of the final part. The development of a digital twin for pellet extrusion is proposed, emphasizing the importance of micro-structure characterization to account for warpage and residual stresses that lead to part distortion. The demonstrator manufactured for this study is a wind turbine mold of a blade section. Experimental tests revealed an elastic modulus of 5.5 GPa and a hardening modulus of 2.4 GPa for the composite. The numerical microscopic model showed a 16% error in the elastic modulus compared to experimental results. The study concludes that the homogenization techniques are effective in predicting the elastic properties but lack accuracy in the plastic region. The application of the model to the LFAM process of pellet extrusion is demonstrated, with simulation results showing a maximum deformation close to the center of the wind turbine blade mold.

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“…The study also analyzed the thermal stress distribution in the bonded wafer and identified the stress release caused by interrupting the wafer continuity as the main factor in reducing warpage. Bacciocchi et al [ 17 ] adopted a multi-step homogenization procedure to predict the mechanical property of the multi-phase porous earth material, and the accuracy was validated by a comprehensive experimental campaign. However, applying multi-step homogenization in predicting wafer warpage is rarely seen.…”

Section: Introductionmentioning

confidence: 99%

Multi-Step Mechanical and Thermal Homogenization for the Warpage Estimation of Silicon Wafers

Xiang,

Chen,

Deng

et al. 2024

Micromachines

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In response to the increasing demand for high-performance capacitors, with a simultaneous emphasis on minimizing their physical size, a common practice involves etching deep vias and coating them with functional layers to enhance operational efficiency. However, these deep vias often cause warpages during the processing stage. This study focuses on the numerical modeling of wafer warpage that occurs during the deposition of three thin layers onto these vias. A multi-step mechanical and thermal homogenization approach is proposed to estimate the warpage of the silicon wafer. The efficiency and accuracy of this numerical homogenization strategy are validated by comparing detailed and homogenized models. The multi-step homogenization method yields more accurate results compared to the conventional direct homogenization method. Theoretical analysis is also conducted to predict the shape of the wafer warpage, and this study further explores the impact of via depth and substrate thickness.

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Multi-phase homogenization procedure for estimating the mechanical properties of shot-earth materials

Cited by 15 publications

References 31 publications

Changing the approach to sustainable constructions: An adaptive mix-design calibration process for earth composite materials

Changing the approach to sustainable constructions: An adaptive mix-design calibration process for earth composite materials

Integrated computational modeling of large format additive manufacturing: Developing a digital twin for material extrusion with carbon fiber-reinforced acrylonitrile butadiene styrene

Multi-Step Mechanical and Thermal Homogenization for the Warpage Estimation of Silicon Wafers

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