scholarly journals Image-based analysis of uniaxial ring test for mechanical characterization of soft materials and biological tissues

Soft Matter ◽  
2019 ◽  
Vol 15 (16) ◽  
pp. 3353-3361 ◽  
Author(s):  
Eline E. van Haaften ◽  
Mark C. van Turnhout ◽  
Nicholas A. Kurniawan
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characterization ◽  
Soft Materials ◽  
Biological Tissues ◽  
Ring Test ◽  
Analysis Approach

We propose a simple image-based analysis approach to accurately estimate the mechanical properties of ring-shaped materials.

scholarly journals Mechanical characterization of functionally graded soft materials with ultrasound elastography

2019 ◽  
Vol 377 (2144) ◽  
pp. 20180075 ◽  
Author(s):  
Guo-Yang Li ◽  
Zhao-Yi Zhang ◽  
Jialin Qian ◽  
Yang Zheng ◽  
Wenli Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dispersion Relation ◽  
Soft Tissues ◽  
Mechanical Characterization ◽  
Applied Mathematics ◽  
Soft Materials ◽  
Functionally Graded ◽  
Ultrasound Elastography ◽  
Transient Wave

Functionally graded soft materials (FGSMs) with microstructures and mechanical properties exhibiting gradients across a spatial volume to satisfy specific functions have received interests in recent years. How to characterize the mechanical properties of these FGSMs in vivo/in situ and/or in a non-destructive manner is a great challenge. This paper investigates the use of ultrasound elastography in the mechanical characterization of FGSMs. An efficient finite-element model was built to calculate the dispersion relation for surface waves in FGSMs. For FGSMs with large elastic gradients, the measured dispersion relation can be used to identify mechanical parameters. In the case where the elastic gradient is smaller than a certain critical value calculated here, our analysis on transient wave motion in FGSMs shows that the group velocities measured at different depths can infer the local mechanical properties. Experiments have been performed on polyvinyl alcohol (PVA) cryogel to demonstrate the usefulness of the method. Our analysis and the results may not only find broad applications in mechanical characterization of FGSMs but also facilitate the use of shear wave elastography in clinics because many diseases change the local elastic properties of soft tissues and lead to different material gradients. This article is part of the theme issue ‘Rivlin's legacy in continuum mechanics and applied mathematics’.

Mechanical Characterization of UV Photopolymerized PMMA with Different Photo-Initiator Concentration

2021 ◽  
Vol 903 ◽  
pp. 11-16
Author(s):  
M.A. Manjunath ◽  
K. Naveen ◽  
Prakash Vinod ◽  
N. Balashanmugam ◽  
M.R. Shankar
Keyword(s):  
Mechanical Properties ◽  
Light Source ◽  
Polymethyl Methacrylate ◽  
Biomedical Applications ◽  
Mechanical Characterization ◽  
Uv Light ◽  
Curing Time ◽  
Uv Led ◽  
Pmma Resin

Polymethyl methacrylate (PMMA) is one among few known photo-polymeric resin useful in lithography for fabricating structures having better mechanical properties to meet the requirement in electronics and biomedical applications. This study explores the effect of Photo Initiator (PI) concentration and also curing time on strength and hardness of Polymethyl methacrylate (PMMA) obtained by UV photopolymerization of Methyl methacrylate (MMA) monomer. The UV LED light source operating at the wavelength of 364 nm is used with Benzoin Ethyl Ether (BEE) as photo initiator. The curing of PMMA resin is supported with peltier cooling device placed at the bottom of the UV light source. The characterisation study of UV photo cured PMMA is analysed through nano indenter (Agilent Technologies-G200). The current work investigates the influence of PI concentration and curing time in achieving maximum mechanical properties for UV photopolymerized PMMA.

scholarly journals Mechanical characterization of aortic valve tissues using an inverse analysis approach

2015 ◽  
Vol 18 (sup1) ◽  
pp. 1976-1977
Author(s):  
C. Laville ◽  
V. Acosta-Santamaria ◽  
O. Trabelsi ◽  
S. Avril ◽  
Y. Tillier
Keyword(s):  
Aortic Valve ◽  
Inverse Analysis ◽  
Mechanical Characterization ◽  
Analysis Approach

Mechanical Characterization of Composites and Biological Tissues by Means of Non-Linear Filtering

1988 ◽  
pp. 1752-1753
Author(s):  
M. A. N. Hendriks ◽  
C. W. J. Oomens ◽  
J. D. Janssen ◽  
J. J. Kok
Keyword(s):  
Mechanical Characterization ◽  
Biological Tissues ◽  
Linear Filtering ◽  
Non Linear

Characterization of Medium Density Particleborads Using Agricultural Residues

2015 ◽  
Vol 1088 ◽  
pp. 656-659
Author(s):  
Ivaldo D. Valarelli ◽  
Rosane A.G. Battistelle ◽  
Barbara Stolte Bezerra ◽  
Luiz A. Melgaço N. Branco ◽  
Eduardo Chahud ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Castor Oil ◽  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Raw Materials ◽  
Construction Materials ◽  
Agricultural Residues ◽  
Medium Density ◽  
Polyurethane Resin

In recent years the production of products derived from wood and bamboo are increasing, due to the search for a more rational exploitation of these raw materials. Amongst these products, the particleboards production combine sustainability and rationality in the use of these materials. In this context, this work has the objective to study the application of alternative raw materials in the manufacture of Medium Density Particleboards (MDP), using residues from industrial processimg of coffee and bamboo. MDP had been produced with particles of giganteus bamboo of the Dendrocalamus species and particle of coffee rind in the intermediate layer of the particleboard, bonded with polyurethane resin based on castor oil. The physical and mechanical characterization was carried out accordingly to NBR 14810-3 (2006). The physical properties evaluated were: of water absorption for 2h and 24h; thickness swallowing for 2h and 24h; density, humidity content. The mechanical properties evaluated were: Tensile strength, static bending (MOR and MOE). The results were compared with NBR 14810-2 (2006) and also with the ANSI A208-1 (1993). The physical performance of these particleboards was below the values recommend by the Brazilian norm. Also the mechanical characteristics are not improve, demonstrating that the inclusion of coffee rind did not benefit the physical characteristics and nor the mechanical ones. However it can be used as construction materials for partitions and ceiling panels.

scholarly journals Bend and Shear Tests: Suitable Methods for Mechanical Characterization of Laminated Composite Materials

2007 ◽  
Vol 539-543 ◽  
pp. 901-906 ◽  
Author(s):  
Fernando Carreño ◽  
M. Pozuelo ◽  
José A. Jiménez ◽  
Oscar A. Ruano
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characterization ◽  
Laminated Composite ◽  
Charpy Impact ◽  
Impact Behavior ◽  
Bond Quality ◽  
Shear Tests ◽  
Graphical Visualization ◽  
Laminated Composite Materials

Bend and shear tests were used to characterize the improvement in impact behavior of various ultrahigh carbon steel laminated composites. These tests turned out to deliver much more useful information about the mechanical properties of the laminates than the Charpy impact tests and were especially interesting for characterization of laminates of very high toughness values. The toughness of the various laminates was controlled by the rolling conditions that determined the quality of the bond and the appearance of delamination by the interfaces. The bend test allows determination of yield and maximum stresses, absorbed energy and permits graphical visualization of layer fracture and delaminations as testing proceeds. The shear test allows mechanical characterization of the bond quality between layers, permitting prediction of possible delaminations, and therefore, the mechanical properties of the layered material.

scholarly journals On the use of machine learning techniques for the mechanical characterization of soft biological tissues

2018 ◽  
Vol 34 (10) ◽  
pp. e3121 ◽  
Author(s):  
Myriam Cilla ◽  
Ignacio Pérez-Rey ◽  
Miguel Angel Martínez ◽  
Estefania Peña ◽  
Javier Martínez
Keyword(s):  
Machine Learning ◽  
Mechanical Characterization ◽  
Biological Tissues ◽  
Machine Learning Techniques ◽  
Soft Biological Tissues ◽  
Learning Techniques

Mechanical Characterization of Polymer Nanowires Using MEMS

2006 ◽  
Author(s):  
B. A. Samuel ◽  
Bo Yi ◽  
R. Rajagopalan ◽  
H. C. Foley ◽  
M. A. Haque
Keyword(s):  
Mechanical Properties ◽  
Tensile Testing ◽  
Furfuryl Alcohol ◽  
Mechanical Characterization ◽  
Uniaxial Tensile ◽  
Testing Device ◽  
Uniaxial Tensile Testing ◽  
Polymer Nanowires

We present results on the mechanical properties of single freestanding poly-furfuryl alcohol (PFA) nanowires (aspect ratio > 50, diameters 100–300 nm) from experiments conducted using a MEMS-based uniaxial tensile testing device in-situ inside the SEM. The specimens tested were pyrolyzed PFA nanowires (pyrolyzed at 800° C).

The Mechanical Properties of Porcine Coronary Arteries Determined With a Mixed Experimental-Numerical Approach

2008 ◽  
Author(s):  
Arjen van der Horst ◽  
Chantal N. van den Broek ◽  
Marcel C. M. Rutten ◽  
Frans N. van de Vosse
Keyword(s):  
United States ◽  
Mechanical Properties ◽  
Coronary Arteries ◽  
Arterial Wall ◽  
Coronary Circulation ◽  
Mechanical Characterization ◽  
Numerical Approach ◽  
The United States ◽  
Mechanical Factors

Mechanical characterization of the coronary arterial wall is important for several reasons. Mechanical factors play an important role in the development of atherosclerosis [1]. Atherosclerotic coronary arteries may be treated mechanically with interventions like PTCA and stent implantation, 1265000 PTCA procedures were performed in the United States in 2005 [2]. Furthermore, knowledge of the mechanical properties of the arterial wall is important for modeling of the coronary circulation and explaining its hemodynamics.

Mechanical, Electrical and Thermal Characterization of Commercially Available LTCC Dielectric Tapes

2013 ◽  
Vol 543 ◽  
pp. 212-215
Author(s):  
Goran Radosavljević ◽  
Nelu Blaž ◽  
Andrea Marić ◽  
W. Smetana ◽  
Ljiljana Živanov
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Electrical Properties ◽  
Material Characterization ◽  
Mechanical Characterization ◽  
Thermal Characterization ◽  
Material Parameters ◽  
Mechanical And Electrical Properties

Presented paper deals with mechanical and electrical properties of several commercially available LTCC (Low Temperature Co-fired Technology) tapes, as well as their thermal characterization. Three commercially available dielectric tape materials provided by Heraeus (CT700, CT707 and CT800) are investigated. The samples for determination of significant material parameters are prepared using the standard LTCC fabrication process. Results of the material characterization (chemical analysis, surface roughness electrical and mechanical properties) are presented. In addition thermo-electrical and-mechanical characterization of investigated tapes analysis is performed.

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