Mechanical compression tests to model timber structures behaviour

2007 ◽  
Author(s):  
V. De Luca ◽  
D. Sabia
Keyword(s):  
Timber Structures ◽  
Mechanical Compression ◽  
Compression Tests

scholarly journals Fabrication and Characterization of Scaffolds of Poly(ε-caprolactone)/Biosilicate® Biocomposites Prepared by Generative Manufacturing Process

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Daniel Aparecido Lopes Vieira da Cunha ◽  
Paulo Inforçatti Neto ◽  
Kelli Cristina Micocci ◽  
Caroline Faria Bellani ◽  
Heloisa Sobreiro Selistre-de-Araujo ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Manufacturing Process ◽  
Potential Application ◽  
Morphological Characterization ◽  
Mechanical Compression ◽  
Compression Tests ◽  
Extrusion Head ◽  
Fabrication And Characterization

Scaffolds of poly(ε-caprolactone) (PCL) and their biocomposites with 0, 1, 3, and 5 wt.% Biosilicate® were fabricated by the generative manufacturing process coupled with a vertical miniscrew extrusion head to application for restoration of bone tissue. Their morphological characterization indicated the designed 0°/90° architecture range of pore sizes and their interconnectivity is feasible for tissue engineering applications. Mechanical compression tests revealed an up to 57% increase in the stiffness of the scaffold structures with the addition of 1 to 5 wt.% Biosilicate® to the biocomposite. No toxicity was detected in the scaffolds tested by in vitro cell viability with MC3T3-E1 preosteoblast cell line. The results highlighted the potential application of scaffolds fabricated with poly(ε-caprolactone)/Biosilicate® to tissue engineering.

Mechanical Behavior of Non Sintered and Sintered Steel Wool

2008 ◽  
Vol 47-50 ◽  
pp. 121-124 ◽  
Author(s):  
Jean Philippe Masse ◽  
K. Beyer ◽  
Didier Bouvard ◽  
Olivier Bouaziz ◽  
Yves Bréchet ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Initial Density ◽  
Cellular Materials ◽  
Compression Stress ◽  
Mechanical Compression ◽  
Compression Tests ◽  
Sintered Steel ◽  
Steel Wool ◽  
Two Temperatures

Entangled materials are similar to cellular materials, with regard to their low density and discrete architecture. In this work steel wool (sintered in a furnace for various time at two temperatures) and non sintered steel wool are investigated. Experimental mechanical compression tests were performed on both materials. Compression stress and Young’s modulus are extracted and compared with the time and temperature of sintering, and initial density. The results are analyzed using a classical Toll’s model. A special attention is paid to the value of the exponent which relates stress and Young’s modulus to density. This exponent ranges from 3 to 5 for non sintered wool, and is close to 3 for the stress law and 4 for the Young’s modulus law for sintered wool.

scholarly journals Comparison of quantitative shear wave MR-elastography with mechanical compression tests

2002 ◽  
Vol 49 (1) ◽  
pp. 71-77 ◽  
Author(s):  
U. Hamhaber ◽  
F.A. Grieshaber ◽  
J.H. Nagel ◽  
U. Klose
Keyword(s):  
Shear Wave ◽  
Mr Elastography ◽  
Mechanical Compression ◽  
Compression Tests

scholarly journals Ultra-High Molecular Weight Polyethylene/Titanium-Hybrid Implant for Bone-Defect Replacement

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3010 ◽  
Author(s):  
Aleksey V. Maksimkin ◽  
Fedor S. Senatov ◽  
Kirill Niaza ◽  
Tarek Dayyoub ◽  
Sergey D. Kaloshkin
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Titanium Alloy ◽  
High Molecular Weight ◽  
Three Dimensional ◽  
Mechanical Compression ◽  
Compression Tests ◽  
Natural Bone ◽  
Ultra High Molecular Weight ◽  
Bone Layer

A hybrid implant with a structure mimicking that of natural bone was developed. Titanium alloy Ti–6Al–4V prepared with three-dimensional (3D)-printing technology was used to simulate the cortical-bone layer. The mismatch in the mechanical properties of bone and titanium alloy was solved by creating special perforations in the titanium’s surface. Porous ultra-high molecular weight polyethylene (UHMWPE) with high osteogenous properties was used to simulate the cancellous-bone tissue. A method for creating a porous UHMWPE structure inside the titanium reinforcement is proposed. The porous UHMWPE was studied with scanning electron microscope (SEM) to confirm that the pores that formed were open, interconnected, and between 50 and 850 μm in size. Mechanical-compression tests done on the obtained UHMWPE/titanium-hybrid-implant samples showed that their mechanical properties simulated those of natural bone.

Compression properties of vascular boundles and parenchyma of rattan (Plectocomia assamica Griff)

Holzforschung ◽  
2014 ◽  
Vol 68 (8) ◽  
pp. 927-932 ◽  
Author(s):  
Xing’e Liu ◽  
Genlin Tian ◽  
Lili Shang ◽  
Shumin Yang ◽  
Zehui Jiang
Keyword(s):  
Young’S Modulus ◽  
Cross Section ◽  
Compression Strength ◽  
Young's Modulus ◽  
Vascular Bundles ◽  
Mechanical Compression ◽  
Compression Tests ◽  
Compression Properties ◽  
Parenchyma Cells ◽  
Different Parts

Abstract Rattan is a unique unidirectional vascular bundles-reinforced biocomposite with many nodes along its canes. Mechanical compression tests have been performed from rattan samples taken from different parts of the cross section. Compression strength increased with increasing amounts of vascular bundles (VBs) in the tissues was investigated. Samples including the outer ring with many VBs have the highest apparent Young’s modulus of 1.08 GPa and the highest compression strength of 17.6 MPa. However, samples consisting of parenchyma cells had an apparent Young’s modulus of 25 MPa, and the compression strength of 1.81 MPa. The compression properties of core samples improved with increasing amounts of VB. The apparent Young’s modulus and compression strength of a single VB were 730 MPa and 6.87 MPa, respectively, and were calculated according to the rule of mixture of composites.

A Comparison of Mechanical Properties of Lumbar Bilateral Implants Manufactured by Additive and Conventional Technologies

2014 ◽  
Vol 635 ◽  
pp. 139-142 ◽  
Author(s):  
Lucia Fedorová ◽  
Irenej Poláček ◽  
Radovan Hudák ◽  
Mária Mihaliková ◽  
Jozef Živčák
Keyword(s):  
Mechanical Properties ◽  
Mechanical Damage ◽  
Tensile Tests ◽  
Mechanical Tests ◽  
Mechanical Compression ◽  
Compression Tests ◽  
Spinal Implants ◽  
Conventional Technology ◽  
Static Tensile ◽  
Static And Dynamic Loads

Spinal implants are mechanical equipments that facilitate fusion, correct deformities, and stabilize and strengthen the spine. To make an implant efficient, it has to endure without any failure, especially mechanical damage, stand all the static and dynamic loads incurred in spine during everyday activities, and maintain the necessary position of motive segments during the bone adhesion. [1] Human spine is exposed to the highest load in the lumbar section [2]; therefore, lumbar bilateral implants require higher attention in terms of mechanical parameters verification. The main objective of this paper was to compare mechanical properties of lumbar bilateral systems using the spinal implants manufactured by the conventional method and the Direct Metal Laser Sintering method (DMLS). Detection of mechanical properties enables the assessment of possible replacement of commercial manufacture with the DMLS manufacture. On the basis of the ASTM F1717 standards providing the essentials for the comparison of mechanical properties of spinal systems, twenty mechanical compression tests were carried out. Mechanical tests were carried out using 20 spinal bars with the diameter of 11 mm and the fastening length of 260 mm, manufactured by the DMLS technology while using the EOSINT M280 equipment (EOS, Germany), and 20 identical spinal bars manufactured by the conventional technology. Results obtained in mechanical compression tests indicate that both manufacture methods are comparable and there are no significant differences between them, as for the strength characteristics. Other trials will be focused on static tensile tests and cyclical tests of lumbar bilateral systems.

Effect of the Filling Pattern on the Compression Strength of 3D Printed Objects Using Acrylonitrile Butadiene Styrene (ABS)

2020 ◽  
Vol 834 ◽  
pp. 115-119
Author(s):  
Jhoselyn Reyes Morocho ◽  
Andrés Criollo Sánchez ◽  
Marco Singaña ◽  
Caterine Donoso
Keyword(s):  
Compressive Strength ◽  
Compression Strength ◽  
Acrylonitrile Butadiene Styrene ◽  
Industrial Applications ◽  
Mechanical Compression ◽  
Compression Tests ◽  
Rectangular Pattern ◽  
Deposition Modeling ◽  
3D Printed ◽  
Butadiene Styrene

The present study exhibits the behavior of ABS polymer (acrylonitrile butadiene styrene) subjected to mechanical compression tests considering two filling patterns, rectangular and hexagonal; these patterns have been selected due to the geometric arrangement of their internal structure improves the mechanical properties of 3D printed parts, in addition to the increase in tensile strength. The specimens were developed by molten deposition modeling (FDM) under the ASTM D695 standard in 2015, so five samples of each pattern were made; they have an 80% filler material. This is due to the demanding mechanical requirement in engineering applications. The results obtained show that the rectangular fill pattern at 0° and 90° registered the highest compressive strength obtaining as a result an average compression strength of 4 179.92 N, likewise a percentage of deformation of 5.96% and a maximum compressive strength of 33.147 MPa. Because of the evidenced data, the rectangular pattern is useful for engineering and industrial applications, including substituting car parts, machinery or household appliances.

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