Mechanical characterization of Trebisacce stone: preliminary results

Preliminary Results on the Tensile Capacity of Steel Anchors in Brick Units of Different Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.817.371 ◽

2019 ◽

Vol 817 ◽

pp. 371-376 ◽

Cited By ~ 1

Author(s):

Peng Zhen Chen ◽

Francesco Finelli ◽

Elisa Franzoni ◽

Cristina Gentilini ◽

Gabriele Sansone

Keyword(s):

Mechanical Characterization ◽

High Strength ◽

Substrate Material ◽

Masonry Buildings ◽

Structural Elements ◽

Mechanical Interlocking ◽

Preliminary Results ◽

Pull Out ◽

Steel Bars

High strength steel bars are widely used for the strengthening of masonry buildings, in particular to improve the connection between different structural elements, such as orthogonal walls and multi-leaf walls. A particular type of steel connector is the twisted bar, which due to its particular shape works as a self-threading screw, anchoring to the support material without any binder. The effectiveness of such technique mainly relies on the bond between the bar and the substrate, where adhesion, mechanical interlocking and friction play an important role. In this paper, a preliminary experimental study on pull-out behavior of twisted steel connectors inserted in brick units of different materials that can be commonly found in existing masonry buildings in Italy and in Europe is presented. Additionally, mechanical characterization of the materials is conducted to understand the influence of the compression strength and elastic modulus on the adhesion between the connector and the substrate. Preliminary results show that the pull-out response strongly depends on the mechanical properties of the substrate material.

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Preliminary results towards the mechanical characterization of cellulose nanofibers using HarmoniX mode atomic force microscopy

10.1063/5.0068542 ◽

2021 ◽

Author(s):

Taljinder Singh ◽

Pierfrancesco Atanasio ◽

Daniele Schiavi ◽

Veronica Di Lorenzo ◽

Francesca Anna Scaramuzzo ◽

...

Keyword(s):

Atomic Force Microscopy ◽

Mechanical Characterization ◽

Cellulose Nanofibers ◽

Force Microscopy ◽

Preliminary Results ◽

Atomic Force ◽

Mode Atomic Force Microscopy

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Massively Parallel Mechanical Characterization of Nanowires

10.26226/morressier.5f5f8e69aa777f8ba5bd5f86 ◽

2020 ◽

Author(s):

Rodrigo Bernal

Keyword(s):

Mechanical Characterization ◽

Massively Parallel

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Spectro-mechanical Characterization of Aromaticity and Maturity of Kerogens in Oil Shale at 6 nm Spatial Resolution

10.26434/chemrxiv.7336160 ◽

2018 ◽

Author(s):

Devon Jakob ◽

Le Wang ◽

Haomin Wang ◽

Xiaoji Xu

Keyword(s):

Spatial Resolution ◽

Oil Shale ◽

Infrared Imaging ◽

Mechanical Characterization ◽

Optical Diffraction ◽

Chemical Compositions ◽

Valuable Insight ◽

Eagle Ford Shale

<p>In situ measurements of the chemical compositions and mechanical properties of kerogen help understand the formation, transformation, and utilization of organic matter in the oil shale at the nanoscale. However, the optical diffraction limit prevents attainment of nanoscale resolution using conventional spectroscopy and microscopy. Here, we utilize peak force infrared (PFIR) microscopy for multimodal characterization of kerogen in oil shale. The PFIR provides correlative infrared imaging, mechanical mapping, and broadband infrared spectroscopy capability with 6 nm spatial resolution. We observed nanoscale heterogeneity in the chemical composition, aromaticity, and maturity of the kerogens from oil shales from Eagle Ford shale play in Texas. The kerogen aromaticity positively correlates with the local mechanical moduli of the surrounding inorganic matrix, manifesting the Le Chatelier’s principle. In situ spectro-mechanical characterization of oil shale will yield valuable insight for geochemical and geomechanical modeling on the origin and transformation of kerogen in the oil shale.</p>

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