scholarly journals Agrigento Cathedral

2016 ◽  
pp. 975-1001
Author(s):  
Liborio Cavaleri ◽  
Maria Giovanna Saccone ◽  
Maurizio Costa ◽  
Calogero Foti ◽  
Giuseppe Basile
Keyword(s):  
Mechanical Characterization ◽  
The State ◽  
Fe Model ◽  
Structural Members ◽  
Safety Level ◽  
Foundation Soil ◽  
Experimental Campaign ◽  
Extensive Damage

At present Agrigento Cathedral is affected by extensive damage that seems to be mainly due to partial slumping of the foundation soil. The chapter deals with the state of damage that affects the cathedral and the investigation carried out for the mechanical characterization of the construction, the formulation of an FE model and the assessment of the safety level with respect to the service loads and with respect to exceptional loads like seismic ones. In the chapter the details of the above investigation are discussed, consideration also being given to the monitoring carried out in order to understand whether the phenomenon affecting the cathedral is ongoing. The results of the monitoring and the experimental campaign on the structural members are described, revealing an unexpectedly low capacity with respect to service loads. Then a comparison is carried out between the response of the FE model and the experimental observations for the identification of the causes of distress. Finally possible action is discussed.

Agrigento Cathedral

2015 ◽  
pp. 704-733 ◽  
Author(s):  
Liborio Cavaleri ◽  
Maria Giovanna Saccone ◽  
Maurizio Costa ◽  
Calogero Foti ◽  
Giuseppe Basile
Keyword(s):  
Mechanical Characterization ◽  
The State ◽  
Fe Model ◽  
Structural Members ◽  
Safety Level ◽  
Foundation Soil ◽  
Experimental Campaign ◽  
Extensive Damage

At present Agrigento Cathedral is affected by extensive damage that seems to be mainly due to partial slumping of the foundation soil. The chapter deals with the state of damage that affects the cathedral and the investigation carried out for the mechanical characterization of the construction, the formulation of an FE model and the assessment of the safety level with respect to the service loads and with respect to exceptional loads like seismic ones. In the chapter the details of the above investigation are discussed, consideration also being given to the monitoring carried out in order to understand whether the phenomenon affecting the cathedral is ongoing. The results of the monitoring and the experimental campaign on the structural members are described, revealing an unexpectedly low capacity with respect to service loads. Then a comparison is carried out between the response of the FE model and the experimental observations for the identification of the causes of distress. Finally possible action is discussed.

Mechanical characterization of tetraxial textiles

2017 ◽  
Vol 48 (1) ◽  
pp. 3-24 ◽  
Author(s):  
Mehdi Ghazimoradi ◽  
Valter Carvelli ◽  
Maria Chiara Marchesi ◽  
Roberto Frassine
Keyword(s):  
Mechanical Properties ◽  
Strain Field ◽  
Mechanical Characterization ◽  
Tensile Tests ◽  
Image Correlation ◽  
Correlation Technique ◽  
Digital Image Correlation Technique ◽  
Experimental Campaign ◽  
Out Of Plane

In this paper, the mechanical properties of different tetraxial fabrics are investigated. Fabrics were produced using an innovative loom capable of weaving four threads at the same time with complete discretion of yarn type and count. The experimental investigation deals with in-plane and out-of-plane mechanical testing of tetraxial fabrics, as well as yarns made of four different materials (polyethylene terephthalate, glass, aramid, and basalt). The digital image correlation technique was used to measure the in-plane strain field for both uniaxial and biaxial tensile tests. The extensive experimental campaign allowed for a complete mechanical characterization of this novel fabric architecture including interlacement of different yarns.

scholarly journals PHYSICAL-MECHANICAL CHARACTERIZATION OF THE WOOD OF Plathymenia reticulata BENTH (VINEYARD-OF-FIELD) NATIVE SPECIES OF THE CERRADO OF THE STATE OF TOCANTINS

FLORESTA ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 247
Author(s):  
Raquel Marchesan ◽  
Lucas Alves Ferreira Souza ◽  
Rodrigo Araújo Fortes ◽  
Raydel Lorenzo Reinaldo ◽  
André Orathes do Rego Barros ◽  
...  
Keyword(s):  
Native Species ◽  
Mechanical Characterization ◽  
Basic Density ◽  
Physical And Mechanical Properties ◽  
Mechanical Tests ◽  
The State ◽  
Native Forest ◽  
Average Value ◽  
Heavy Construction

Physical-Mechanical Characterization of the Wood of Plathymenia reticulata Benth (Vinhático-do-campo) Species of the Cerrado Biome of the State of Tocantins. The objective of this work was to determine the physical and mechanical properties of Plathymenia reticulata Benth (vinhático-do-campo) wood to indicate its potential use. The wood used in the production of the specimens came from the municipality of Dueré – TO native forest. The basic density, wood retractability, and anisotropy coefficient were obtained from physical tests, and the values of axial compression and static flexion resistance from the mechanical tests. The values obtained showed that the Plathymenia reticulata Benth wood fits the C40 resistance classification for hardwoods, determined by the Brazilian Standard (NBR7190). The average value of the basic density found was 0.64 g cm-3, classified as a medium density wood and the values of tangential, radial and volumetric retractability were 6.11%, 3.06%, 9.39 %, respectively. As for its mechanical characteristics, it presented average values of compressive strength parallel to the fibers, resistance to static flexion, and elastic modulus equal to 58.8MPa, 128.2 MPa, and 12760.0MPa, respectively. The vinhático-do-campo wood can be classified as stable wood and its physical characteristics suggest a normal quality. The species can be applied in light and heavy construction.

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

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>

MECHANICAL CHARACTERIZATION OF POLYMER MATERIALS UNDER LOW STRAIN RATE LOADING

2017 ◽  
Vol 5 (3) ◽  
pp. 8
Author(s):  
KUMAR DINESH ◽  
KAUR ARSHDEEP ◽  
AGGARWAL YUGAM KUMAR ◽  
UNIYAL PIYUSH ◽  
KUMAR NAVIN ◽  
...  
Keyword(s):  
Strain Rate ◽  
Mechanical Characterization ◽  
Polymer Materials ◽  
Strain Rate Loading ◽  
Low Strain Rate

MECHANICAL CHARACTERIZATION OF VEGETAL COMPOSITES USING DIC

2019 ◽  
Author(s):  
Alexandre Luiz Pereira ◽  
Rafael Oliveira Santos ◽  
DOINA BANEA ◽  
Álisson Lemos
Keyword(s):  
Mechanical Characterization
Sign in / Sign up

Export Citation Format

Share Document