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Journal articles on the topic 'Concept of tensile testing device'

Author: Grafiati

Published: 28 June 2021

Last updated: 7 February 2022

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1

Vieira, A. C., Ricardo Medeiros, R. M. Guedes, A. T. Marques, and V. Tita. "Visco-Elastic-Plastic Properties of Suture Fibers Made of PLA-PCL." Materials Science Forum 730-732 (November 2012): 56–61. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.56.

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Aliphatic polyesters, like PGA, PLA, PCL and PDO, among others, are biodegradable materials that find applications in many biomedical devices, from fibers for subcutaneous sutures to other regenerative surgery implants. The main concept among these applications is to use a biodegradable device that temporarily replace the biomechanical functions, avoiding this way the chirurgical procedures to remove the device. However, the dimensioning of these devices is complex, not only because the mechanical properties evolve during degradation, but also because these biodegradable materials cannot be assumed as elastic materials. In more precise terms, the response of an elastic material implies that the loading and unloading paths coincide, the material responds instantaneously to an applied load, its behavior is time-independent and the material returns to its former unloaded configuration upon the removal of external loads. In this work, fibers of non-degraded PLA-PCL were submitted to tensile testing at different rates, to load-unloading cycles at different load levels and with or without delay before reloading, creep and fatigue tests at different levels of load. These results elucidate the viscoelastic/viscoplastic nature of this class of materials. The load-unloading cyclic test results allow determining the different components of the strain: elastic, plastic and viscous. The visco-plastic nature was also reflected on the creep and fatigue results. The findings discussed in this work must be taken into account when designing biomedical devices, to avoid common causes of failure such as laxity or premature rupture.

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Gueninchault, N., H. Proudhon, and W. Ludwig. "Nanox: a miniature mechanical stress rig designed for near-field X-ray diffraction imaging techniques." Journal of Synchrotron Radiation 23, no. 6 (October 18, 2016): 1474–83. http://dx.doi.org/10.1107/s1600577516013850.

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Multi-modal characterization of polycrystalline materials by combined use of three-dimensional (3D) X-ray diffraction and imaging techniques may be considered as the 3D equivalent of surface studies in the electron microscope combining diffraction and other imaging modalities. Since acquisition times at synchrotron sources are nowadays compatible with four-dimensional (time lapse) studies, suitable mechanical testing devices are needed which enable switching between these different imaging modalities over the course of a mechanical test. Here a specifically designed tensile device, fulfilling severe space constraints and permitting to switch between X-ray (holo)tomography, diffraction contrast tomography and topotomography, is presented. As a proof of concept the 3D characterization of an Al–Li alloy multicrystal by means of diffraction contrast tomography is presented, followed by repeated topotomography characterization of one selected grain at increasing levels of deformation. Signatures of slip bands and sudden lattice rotations inside the grain have been shown by means ofin situtopography carried out during the load ramps, and diffraction spot peak broadening has been monitored throughout the experiment.

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3

Melnykowycz, Mark, Michael Tschudin, Rebecca Selle, Kelley R. Maynard, Rebecca R. Richards-Kortum, Z. Maria Oden, and Frank J. Clemens. "Soft Condensed Matter Hybrid Fiber Sensors for Vital Function Monitoring." Advances in Science and Technology 100 (October 2016): 79–84. http://dx.doi.org/10.4028/www.scientific.net/ast.100.79.

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Textile band structures with integrated soft condensed matter sensor (SCMS) can be used as a vital function monitor device to detect pulse wave and breathing on the human body. A textile an elastic band was used as a support material and the U-shaped SCMS fiber sensor was bonded on the surface with elastic band with a liquid rubber bonding material. The sensor signal and gauge factor of the textile sensor structure was investigated using tensile testing experiments. The resistivity of the sensor structure increased linearly within a strain of 10 to 50%, and a slope of 8 (kOhm/% strain) could be detected. The sensor had a gauge factor of 4-5 from 10 to 50% between strain. Using the integrated SCMS sensor textile band around the chest, it was possible to detect talking, normal breathing and coughing. In collaboration with Rice University the textile sensor was tested for proof-of-concept for use in a battery-powered monitor for apnea of premature infants.

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4

Lee, Candice Y., Joshua K. Wong, Jude S. Sauer, Heather R. Gorea, Angelo J. Martellaro, Andrew R. Sifain, and Peter A. Knight. "An Automated Expanded Polytetrafluoroethylene Suturing and Coaxial Fastener System for Mitral Chordae Replacement: Strength, Feasibility, and Healing." Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery 11, no. 6 (November 2016): 400–406. http://dx.doi.org/10.1097/imi.0000000000000316.

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Objective Mitral valve (MV) chordae replacements can be technically challenging. Technology that remotely delivers and accurately secures artificial chordae may reduce the learning curve and improve the reliability of MV repairs. Methods The technology involved two devices: a remote suturing device for delivery of expanded polytetrafluoroethylene (ePTFE) suture to the papillary muscle and a Coaxial titanium suture fastener (TF) device with integrated saline infusion for real-time determination of chordae length during fixation. A mechanical model simulating MV chordae tension in a beating heart quantified the durability of 120 coaxially fastened ePTFE sutures using TF over time. Investigation of the technology was performed in ex vivo porcine, ovine, and in situ cadaver hearts, whereas live-tissue testing was conducted in a survivor ovine model. Mitral valve repair procedures involved the iatrogenic induction of mitral regurgitation by the resection of one to two native MV chordae, followed by implantation of ePTFE suture using the technology. Epicardial echocardiography, saline infusion testing, and histologic analysis evaluated MV competence, repair integrity, and long-term healing. Results Durability testing of ePTFE suture secured with TF demonstrated no degradation of TF pull-apart forces of for 440 million cycles. Mitral valve repairs using the technology were performed in eight sheep; four demonstrating proof of concept and four survived for an average of 6.5 months after completion of the procedure. At reoperation, echocardiography demonstrated trace to no mitral regurgitation with near complete endothelialization of the TF and artificial chordae. Conclusions This technology successfully enabled the implantation of artificial chordae while providing real-time adjustment of chordae length during MV repair. These results encourage further investigation of its use clinically.

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5

Kaul, Anand, Ahmed Abbas, Gabriel Smith, Sunil Manjila, Jonathan Pace, and Michael Steinmetz. "A revolution in preventing fatal craniovertebral junction injuries: lessons learned from the Head and Neck Support device in professional auto racing." Journal of Neurosurgery: Spine 25, no. 6 (December 2016): 756–61. http://dx.doi.org/10.3171/2015.10.spine15337.

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Fatal craniovertebral junction (CVJ) injuries were the most common cause of death in high-speed motor sports prior to 2001. Following the death of a mutual friend and race car driver, Patrick Jacquemart (1946–1981), biomechanical engineer Dr. Robert Hubbard, along with race car driver and brother-in-law Jim Downing, developed the concept for the Head and Neck Support (HANS) device to prevent flexion-distraction injuries during high-velocity impact. Biomechanical testing showed that neck shear and loading forces experienced during collisions were 3 times the required amount for a catastrophic injury. Crash sled testing with and without the HANS device elucidated reductions in neck tension, neck compression, head acceleration, and chest acceleration experienced by dummies during high-energy crashes. Simultaneously, motor sports accidents such as Dale Earnhardt Sr.'s fatal crash in 2001 galvanized public opinion in favor of serious safety reform. Analysis of Earnhardt's accident demonstrated that his car's velocity parallel to the barrier was more than 150 miles per hour (mph), with deceleration upon impact of roughly 43 mph in a total of 0.08 seconds. After careful review, several major racing series such as the National Association for Stock Car Auto Racing (NASCAR) and Championship Auto Racing Team (CART) made major changes to ensure the safety of drivers at the turn of the 21st century. Since the rule requiring the HANS device in professional auto racing series was put in place, there has not been a single reported case of a fatal CVJ injury.

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6

Ilzhöfer, A., H. Schneider, and C. Tsakmakis. "Tensile testing device for microstructured specimens." Microsystem Technologies 4, no. 1 (December 1997): 46–50. http://dx.doi.org/10.1007/s005420050091.

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7

Ang, Eng Joo, Hee Kit Wong, J. Goh, and Wai Mey Yuen. "Device for tensile testing of rabbit patellar tendons." Medical & Biological Engineering & Computing 27, no. 5 (September 1989): 545–48. http://dx.doi.org/10.1007/bf02441477.

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8

Habibi, S., A. Ziadi, and A. Megueni. "Modeling a Small Punch Testing Device." Engineering, Technology & Applied Science Research 4, no. 2 (April 17, 2014): 612–17. http://dx.doi.org/10.48084/etasr.416.

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A small punch test of a sample in miniature is implemented in order to estimate the ultimate load of CrMoV ductile steel. The objective of this study is to model the ultimate tensile strength and ultimate load indentation according to the geometrical parameters of the SPT using experimental data. A comparison of the model obtained with the two models (European code of practice and method of Norris and Parker) allows the design and dimensioning of an indentation device that meets the practical constraints. Implemented as a Matlab program, allows the investigation of new combinations of test variables.

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9

Bai, Qing-Shun, Kai Cheng, Bin He, and Ying-Chun Liang. "Design of a novel tensile testing device and its application in tensile testing experiments on copper micro wires." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 226, no. 9 (August 6, 2012): 1594–600. http://dx.doi.org/10.1177/0954405412454058.

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10

Mackenzie, C., C. Rowley-Williams, M. Achour, D. Blumer, M. Joosten, and M. Rowe. "Potential for Measurement of Corrosion-Inhibitor-Micelle Presence as an Indicator of Optimum Dose." SPE Journal 17, no. 02 (January 24, 2012): 393–401. http://dx.doi.org/10.2118/130285-pa.

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Summary This paper discusses the principle and proof of concept of a novel corrosion-management tool based on maintaining optimum corrosion-inhibitor dose in an inhibited environment. Film-forming corrosion inhibitors typically contain active ionic surfactant molecules, which adsorb on surfaces and form a protective barrier against corrosion. Upon saturation of surfaces by the inhibitor, the molecules are found in the aqueous phase as micelles or in the oil phase as reverse micelles. The proposed technique is based on the hypothesis that the presence of these micelles in the water phase could be used to indicate the total surface coverage and, therefore, the optimum dose. The technique has been applied in the laboratory simulating an actual inhibited multiphase production system. Fluorescent markers, which are extremely sensitive to micelle presence, have been developed and used during the laboratory testing. Results were compared with those from standard laboratory techniques, including interfacial tension (IFT) and particle-size analyses (diffraction), in order to determine the efficacy for micelle detection. Corrosion bubble tests were also used to determine any link to inhibitor efficiency. IFT results showed complex events occurring with increasing inhibitor concentration. The IFT vs. inhibitor concentration curve was nonclassical, probably because of the multicomponent nature of inhibitor formulations, but suggested micelle formation at approximately 150 ppm. Fluorescence analysis suggested that micelles formed starting at a 150-ppm dose. Particle-size analysis was consistent with micelle presence beyond this concentration. Separate experiments comparing fluorescence with corrosion rates demonstrated an apparent nonlinear variance with inhibitor concentration, supporting the hypothesis. The analytical comparisons supported the underlying principles of this micelle-detection technology. Development of a portable device is under way and will provide an important new tool for proactive corrosion management in the oil field as well as a useful laboratory qualification method.

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11

Pereira, António B., Fábio A. O. Fernandes, Alfredo B. de Morais, and João Maio. "Biaxial Testing Machine: Development and Evaluation." Machines 8, no. 3 (July 21, 2020): 40. http://dx.doi.org/10.3390/machines8030040.

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Biaxial mechanical testing gained increased importance for characterization of materials that present anisotropic behavior and/or different responses when subjected to tensile and compression loadings. In this work, a new biaxial testing machine was developed. The various systems and components were designed, manufactured, assembled, and assessed. Uniaxial tensile tests were performed to validate the device, showing results consistent with those obtained on a universal testing machine. Finally, biaxial tensile tests were also performed on polypropylene cruciform specimens. The results revealed high precision levels, thus showing the potential of this new machine.

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12

JOMORI, Tomoya, Kenji MIYAMOTO, Koji SUGANO, Toshiyuki TSUCHIYA, and Osamu TABATA. "1119 Tensile Testing of Carbon Nano Materials using Electrostatic MEMS Device." Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP 2007 (2007): 66–69. http://dx.doi.org/10.1299/jsmeiip.2007.66.

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13

Weerheijm, J., and H. W. Reinhardt. "Device for testing concrete under impact tensile loading and lateral compression." Nuclear Engineering and Design 126, no. 3 (May 1991): 395–401. http://dx.doi.org/10.1016/0029-5493(91)90028-g.

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14

Taniguchi, Kazuhiro, Etsuko Kobayashi, Sanghyun Joung, Minoru Ono, Noboru Motomura, Shunei Kyo, Shinichi Takamoto, and Ichiro Sakuma. "A Force Measurement Device Using Optical Fiber for Surgical Tools - Basic Concept and Implementation -." Journal of Robotics and Mechatronics 23, no. 1 (February 20, 2011): 94–104. http://dx.doi.org/10.20965/jrm.2011.p0094.

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The system proposed here measures compressive and tensile stress working longitudinally in an endoscopic surgical-assistant robot tool for the palpation of lung cancer. The force sensor is a safe, sanitary Fiber Bragg Grating (FBG) strain sensor. Such sensors are suitable for medical applications but have the disadvantage of force measurement being adversely affected by temperature. An FBG sensor on a workpiece is strained simultaneously with the workpiece to measure force based on the strain degree. A workpiece with a high Young’s modulus decrease strain, compromising sensor measurement resolution. Our proposal, discussed and evaluated in the sections that follow, solves these problems of temperature compensation and measurement resolution. The trial device we fabricated amplifies strain to enhance measurement resolution. We measured FBG sensor performance by applying compressive and tensile stress longitudinally on the trial device and determined, based on measurement results, that strain was amplified. We also confirmed that FBG sensormeasurement corresponded linearly to the compressive and tensile stress of 0-3 N. The trial device we fabricated filtered bending and torsional stress – excluding tensile and compressive stress – applied to the workpiece and confirmed device effectiveness in suppressing bending and torsional stress. Our trial device for temperature compensation solves the problems of the FBG sensor within a small, lightweight package.

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15

Daneshjo, Naqib, Milan Majernik, Erika Dudas Pajerska, and Mirwajs Danishjoo. "CONCEPT OF OPTIMIZATION AND DESIGN OF A TESTING DEVICE FOR TESTING SEPARATING GRILLES." MM Science Journal 12, no. 2018 (December 12, 2018): 2585–92. http://dx.doi.org/10.17973/mmsj.2018_12_201825.

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16

Benedik Jr, Jaroslav, Petra Azhari, Konstantinos Tsagakis, Kevin Pilarczyk, Jiri Indruch, Hideo A. Baba, Jaroslav Benedik, and Heinz Jakob. "Dissectometer - a new device for tensile strength testing of the vascular wall." Minimally Invasive Therapy & Allied Technologies 21, no. 5 (December 5, 2011): 329–34. http://dx.doi.org/10.3109/13645706.2011.642076.

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17

Tsuchiya, Toshiyuki, Tetsuya Hemmi, Jun-ya Suzuki, Yoshikazu Hirai, and Osamu Tabata. "Tensile Strength of Silicon Nanowires Batch-Fabricated into Electrostatic MEMS Testing Device." Applied Sciences 8, no. 6 (May 28, 2018): 880. http://dx.doi.org/10.3390/app8060880.

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18

Bamberg, Eberhard, Christian P. Grippo, Panitarn Wanakamol, Alexander H. Slocum, Mary C. Boyce, and Edwin L. Thomas. "A tensile test device for in situ atomic force microscope mechanical testing." Precision Engineering 30, no. 1 (January 2006): 71–84. http://dx.doi.org/10.1016/j.precisioneng.2005.05.001.

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19

Ma, Z., H. Zhao, H. Huang, L. Zhang, K. Wang, and X. Zhou. "A Novel Tensile Device for In Situ Scanning Electron Microscope Mechanical Testing." Experimental Techniques 39, no. 6 (November 1, 2012): 3–11. http://dx.doi.org/10.1111/j.1747-1567.2012.00868.x.

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20

FUJII, Tatsuya, Hirokazu AKAMINE, Dzung Dao, and Takahiro NAMAZU. "J2240105 Development of MEMS Device for Tensile Testing of Nanowire-Shaped Specimens." Proceedings of Mechanical Engineering Congress, Japan 2014 (2014): _J2240105——_J2240105—. http://dx.doi.org/10.1299/jsmemecj.2014._j2240105-.

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21

Haeri, Hadi, Vahab Sarfarazi, and Ahmadreza Hedayat. "Suggesting a new testing device for determination of tensile strength of concrete." Structural Engineering and Mechanics 60, no. 6 (December 25, 2016): 939–52. http://dx.doi.org/10.12989/sem.2016.60.6.939.

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22

Gilat, A., J. D. Seidt, T. A. Matrka, and K. A. Gardner. "A New Device for Tensile and Compressive Testing at Intermediate Strain Rates." Experimental Mechanics 59, no. 5 (March 6, 2019): 725–31. http://dx.doi.org/10.1007/s11340-019-00488-1.

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23

Gish, L. Andrew. "Concept Design of a Deployable Marine Energy Testing System." Marine Technology Society Journal 54, no. 6 (November 1, 2020): 84–90. http://dx.doi.org/10.4031/mtsj.54.6.1.

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AbstractMarine renewable energy has the potential to be a significant contributor to the world's energy portfolio. However, the technology is still in early stages of development, largely due to the lack of infrastructure to support in-water testing. A small number of established permanent test sites exist, but these sites are often prohibitively expensive to build and operate. The objective of this project was to develop a concept design for a small deployable marine energy test system. The solution described is a self-contained system with the capability to monitor the local environmental conditions, host and test one small wave energy converter (typically <1-kW power generation), and collect and store data from the device. The system employs a Sofar Spotter V2 buoy for environmental assessment, a triangular mooring configuration to secure the device, and a USB data acquisition device paired with a laptop computer for data collection and analysis. The system is completely housed in a portable trailer and could be deployed to any area with suitable water conditions (depth, wave environment, etc.). The concept design presented here could serve as a baseline for low-cost customized deployable systems for use by academia, industry, or government organizations.

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24

Martínez-Hergueta, Francisca, Antonio Pellegrino, Álvaro Ridruejo, Nik Petrinic, Carlos González, and Javier LLorca. "Dynamic Tensile Testing of Needle-Punched Nonwoven Fabrics." Applied Sciences 10, no. 15 (July 23, 2020): 5081. http://dx.doi.org/10.3390/app10155081.

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The tensile testing of a needle-punched nonwoven fabric is presented. A high-sensitivity Split-Hopkinson Tensile Bar device was specifically designed for this purpose. The strain gauge measurements were combined with high-speed photography and Digital Image Correlation to analyse the deformation micromechanisms at high strain rates. The experimental set-up allowed to determine the wave propagation velocity of the as-received nonwove fabric, the evolution of the strain field with deformation and the wave interaction inside the fabric. The deformation was accommodated by the same micromechanisms observed during quasi-static tensile testing and ballistic impact, which comprised fibre straightening, rotation and sliding. Heterogeneous strain fields were developed in the nonwoven fabric as a result of the non-linear pseudoplastic response of the fabric and the internal dissipation due to the frictional deformation micromechanisms, preventing the propagation of high magnitude strain waves into the specimen. Additionally, the output forces were analysed to determine the influence of high-strain rates in the mechanical response of the nonwoven fabric, finding an increment of the stiffness for low applied strains under dynamic loading. These findings provide the basis to develop strain-rate dependent constitutive models to predict wave propagation in needle-punched nonwoven fabrics when subjected to impact loads.

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Velez, Nathan R., Frances I. Allen, Mary Ann Jones, Jenn Donohue, Wei Li, Kristofer Pister, Sanjay Govindjee, Gregory F. Meyers, and Andrew M. Minor. "Nanomechanical testing of freestanding polymer films: in situ tensile testing and Tg measurement." Journal of Materials Research 36, no. 12 (April 2, 2021): 2456–64. http://dx.doi.org/10.1557/s43578-021-00163-z.

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Abstract A method for small-scale testing and imaging of freestanding, microtomed polymer films using a push-to-pull device is presented. Central to this method was the development of a sample preparation technique which utilized solvents at cryogenic temperatures to transfer and deposit delicate thin films onto the microfabricated push-to-pull devices. The preparation of focused ion beam (FIB)-milled tensile specimens enabled quantitative in situ TEM tensile testing, but artifacts associated with ion and electron beam irradiation motivated the development of a FIB-free specimen preparation method. The FIB-free method was enabled by the design and fabrication of oversized strain-locking push-to-pull devices. An adaptation for push-to-pull devices to be compatible with an instrumented nanoindenter expanded the testing capabilities to include in situ heating. These innovations provided quantitative mechanical testing, postmortem TEM imaging, and the ability to measure the glass transition temperature, via dynamic mechanical analysis, of freestanding polymer films. Results for each of these mentioned characterization methods are presented and discussed in terms of polymer nanomechanics. Graphic Abstract

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26

Tsuchiya, Toshiyuki, Tetsuya Hemmi, Jun-ya Suzuki, Yoshikazu Hirai, and Osamu Tabata. "Tensile fracture of integrated single-crystal silicon nanowire using MEMS electrostatic testing device." Procedia Structural Integrity 2 (2016): 1405–12. http://dx.doi.org/10.1016/j.prostr.2016.06.178.

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27

Tiernan, P., and G. O’Connor. "Design, manufacture and test of a high temperature tensile and compression testing device." Procedia Manufacturing 17 (2018): 672–79. http://dx.doi.org/10.1016/j.promfg.2018.10.116.

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28

Majzoobi, G. H., D. C. Barton, and M. Ramezani. "Stress wave effects in the Flying Wedge high strain rate tensile testing device." Journal of Strain Analysis for Engineering Design 42, no. 7 (October 1, 2007): 507–16. http://dx.doi.org/10.1243/03093247jsa289.

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Stress wave effects in the high-rate tensile testing apparatus known as the ‘Flying Wedge’ have been investigated using both experimental and numerical approaches. The experiments were conducted on R2000 glass/epoxy composites and iron specimens at strain rates up to 103/s. Numerical simulations were carried out using the LS-DYNA hydro code. Both the numerical and the experimental results showed that the results for small and low-strength specimens were significantly affected by the stress waves that propagate through the parts of the testing machine following the impact. The time period of the resulting load oscillations was found to be similar to that calculated from one-dimensional stress wave theory for different load paths in the apparatus. Therefore, it is concluded that stress wave effects play a dominant role in the Flying Wedge for small and low-strength specimens and consequently this machine is not a suitable choice for dynamic testing of such specimens.

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Jiang, Chenchen, Hongti Zhang, Jian Song, and Yang Lu. "Digital micromirror device (DMD)-based high-cycle tensile fatigue testing of 1D nanomaterials." Extreme Mechanics Letters 18 (January 2018): 79–85. http://dx.doi.org/10.1016/j.eml.2017.11.005.

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Viant, Thibaut, Pascal Forquin, Dominique Saletti, Didier Imbault, Pierre Brunet, Julien Moriceau, and Gilles Poirey. "A testing technique to investigate the tensile behavior of propellant representative material." EPJ Web of Conferences 183 (2018): 02050. http://dx.doi.org/10.1051/epjconf/201818302050.

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Propellants are energetic materials abundantly used to generate the propulsion of rockets, projectiles, or other objects. A wide range of stress-state and strain-rate has to be considered in view of predicting the mechanical behaviour of this material over its different life cycles. Propellant materials are usually studied through the use of propellant representative materials (PRM) when studied in a university laboratory. In the present work an experimental device was developed to investigate the dynamic tensile response of a PRM material. This device is based on the use of a pendulum that is employed to dynamically load the PRM sample on one end. The sample is attached to an instrumented Hopkinson bar on the other end. The data processing of Hopkinson bar point measurements combined to DIC (digital-imagecorrelation) measurements allows the stress and strain levels in the sample to be characterised. Finally these experimental results can be used to enhance the constitutive modelling of PRM materials.

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Ke, Yan, Zhang He Jiang, and Shi Guang Li. "The Design and Experiment of Levelness-Adjustable Clamping Device for Cable Gland." Applied Mechanics and Materials 721 (December 2014): 455–58. http://dx.doi.org/10.4028/www.scientific.net/amm.721.455.

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This paper introduces a design of testing machine that could apply to the clamping tensile test for explosion-proof cable gland and a clamping tensile test for explosion-proof cable that based on this machine. The tension conduction system composed by wire rope and pulley supplies the test device for cable gland with tension by using standard weights counterweight. In order to ensure test precision, the testing machine loading platform can translate along the horizontal orthogonal direction X, Y and rotate around the X axis to adjust the sample space coordinates. The stress-strain sensor can measure the tension value, and the amount of displacement of the specimen can be measured by dial indicator. This paper focuses on the levelness-adjustable system and test methods.

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32

Sheng, Qin Zhu, Cheng Cai Li, Hui She Sun, and Li Qiang Yu. "Experimental Study on In Situ Inspection of Existing Steel Structure’s Steel Strength by Leeb Hardness." Advanced Materials Research 1065-1069 (December 2014): 1770–75. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.1770.

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Experimental studies and regression analysis of experimental data show that when using HL hardness tester (under conditions of C-type/D-type impact device) to measure the tensile strength of steels from existing steel structures, the relation curves between Leeb hardness and tensile strength of steel can be achieved. It may provide a non-destructive (NDT) method for testing tensile strength of steel.

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Wu, Zhi Chao, Ye Shuang Tan, Tian Hui Zhang, and Hui Xian Sun. "Switch Equipment Interface Properties Testing System Design Based on the Reconfigurable Concept." Advanced Materials Research 1055 (November 2014): 250–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1055.250.

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For the situation that digital switching device interface testing is relied on manual and automatic testing system development cost is high, the paper has adopted the reconfigurable technology. And by using the reusable character of general testing system, a special testing system is built, which can solve the contradiction between testing benefit and testing efficiency. The new system consists of hardware reconfigurable matching front-end and software reconfigurable virtual instrument. It has improved the switching device interface testing efficiency and accuracy, and shorten the construction cycle. Its component parts are reconfigurable, and flexible to assemble. It has good generality and expansibility, and certain practical utility. The idea has also provided instructions for designing similar testing system.

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Zhao, Guohua, Dan Wang, Liangbao Liu, Rui Fanand, and Rukun Mi. "Research on multidimensional loading device of material mechanical test." MATEC Web of Conferences 207 (2018): 03012. http://dx.doi.org/10.1051/matecconf/201820703012.

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A multidimensional loading device for the material mechanical test based on Stewart Platform was proposed and manufactured in this paper. A determination method of mechanism parameters toward specific engineering requirements was analysed via inverse kinematics and contact interference boundary condition of mechanism components. A set of optimized mechanism parameters was achieved and then the pose space was obtained. Meanwhile, five repeated quasi-static standard tensile tests were performed on the multidimensional loading device and the standard tensile testing machine, respectively. The average yield strength and ultimate strength of the specimen achieved from the different testers were both merely 1.13%. Results indicated that material mechanical multidimensional loading could be conducted by the parallel mechanism.

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Wang, Weicheng, Yiping Luo, and Meng Ji. "Experimental study on tensile mechanical properties of magnetorheological fluid." International Journal of Modern Physics B 34, no. 08 (March 27, 2020): 2050070. http://dx.doi.org/10.1142/s0217979220500708.

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Magnetorheological fluid (MRF) is a kind of suspension composed of a nonconducting magnetic liquid and small soft magnetic particles with high permeability and low hysteresis. The tensile mechanical properties of MRF reflect its important mechanical properties. In this study, a testing device is designed to investigate the tensile mechanical properties of MRF in accordance with the plate method theory. First, the magnetic field is selected to analyze the influence of different gap sizes on the magnetic field. The magnetic field strength decreases as the gap increases. Second, a testing platform for tensile mechanical properties is built, and the tensile mechanical properties of MRF are experimentally studied under different magnetic field strengths, tensile speeds and surface characteristics. Experimental results show that the stronger the magnetic field, the greater the tensile yield stress. The maximum tensile stress at different velocities is nearly the same. Different surface characteristics affect tensile stress.

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Tsuchiya, Toshiyuki, Yasutake Ura, Koji Sugano, and Osamu Tabata. "Electrostatic Tensile Testing Device With Nanonewton and Nanometer Resolution and Its Application to $\hbox{C}_{60}$ Nanowire Testing." Journal of Microelectromechanical Systems 21, no. 3 (June 2012): 523–29. http://dx.doi.org/10.1109/jmems.2011.2182503.

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Bowser, J. E., S. H. Elder, A. M. Rashmir-Raven, and C. E. Swiderski. "A cryogenic clamping technique that facilitates ultimate tensile strength determinations in tendons and ligaments." Veterinary and Comparative Orthopaedics and Traumatology 24, no. 05 (2011): 370–73. http://dx.doi.org/10.3415/vcot-10-09-0128.

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SummaryObjective: To describe the use of a cryogenic clamp of novel design for tensile strength testing of tendinous and ligamentous tissues with inherently high tensile strength.Methods: Inexpensive, easily machined steel clamps were manufactured to facilitate rapid insertion into a standard wedge-screw grip apparatus installed on a testing system with a control system attached. The deep digital flex-or tendon (DDFT) of six horses was trimmed to a uniform dumbbell shape and secured in clamps using partial submersion in liquid nitrogen for approximately 45 seconds and immediately tested. Approximate time between removal from liquid nitrogen and failure of tendon was four minutes.Results: Failure was achieved in all tendons tested in a region approximating a midpoint between the clamps. Ultimate failure loads of up to 6745 N were achieved without slippage of the tissue from the grips. The ultimate tensile strength of the normal equine DDFT determined in this study was 111.82 ± 11.53 N/mm2, and the stress versus grip-to-grip elongation plots for our equine DDFT were representative of a standard non-linear elastic curve obtained in similar studies.Clinical significance: We present a low cost device for quantifying physical properties of specimens with high connective tissue concentrations and inherent high tensile strength. Results of this study indicate that this device provides a practical alternative to other more costly methods of adequately securing larger tendons and ligaments for tensile strength testing.

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Oh, Hyunjin, and Yoshitada Isono. "102 Mechanical Characterization of Nanometer Thick Gold Thin Film Using MEMS Tensile Testing Device." Proceedings of Conference of Kansai Branch 2010.85 (2010): _1–2_. http://dx.doi.org/10.1299/jsmekansai.2010.85._1-2_.

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Rypl, Rostislav, Rostislav Chudoba, Ulrich Mörschel, Scott E. Stapleton, Thomas Gries, and Guido Sommer. "A novel tensile test device for effective testing of high-modulus multi-filament yarns." Journal of Industrial Textiles 44, no. 6 (February 13, 2014): 934–47. http://dx.doi.org/10.1177/1528083714521069.

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Cao, Changhong, Jane Y. Howe, Doug Perovic, Tobin Filleter, and Yu Sun. "In situTEM tensile testing of carbon-linked graphene oxide nanosheets using a MEMS device." Nanotechnology 27, no. 28 (June 3, 2016): 28LT01. http://dx.doi.org/10.1088/0957-4484/27/28/28lt01.

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YOSHIOKA, Tetsuo, Taeko ANDO, Mitsuhiro SHIKIDA, and Kazuo SATO. ""On-Chip Method" for Tensile Testing of Thin-Film Materials and Its Device Fabricatio." Transactions of the Japan Society of Mechanical Engineers Series C 65, no. 635 (1999): 2973–78. http://dx.doi.org/10.1299/kikaic.65.2973.

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Wang, Yuejiao, Libo Gao, Sufeng Fan, Wenzhao Zhou, Xiang Li, and Yang Lu. "3D printed micro-mechanical device (MMD) for in situ tensile testing of micro/nanowires." Extreme Mechanics Letters 33 (November 2019): 100575. http://dx.doi.org/10.1016/j.eml.2019.100575.

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Kranjec, Matej, Jernej Korinšek, Miha Ambrož, and Robert Kunc. "Control System for a Tensile-Testing Device Using Low-Cost Hardware and Open-Source Software." Strojniški vestnik – Journal of Mechanical Engineering 66, no. 3 (March 15, 2020): 155–63. http://dx.doi.org/10.5545/sv-jme.2019.6418.

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The aim of this study is to verify whether a Raspberry Pi 3 B+ can be utilized as a low-cost device for controlling a tensile-testing device used for material research purposes. A list of requirements based on already-available hardware was drawn up, which the new control system had to fulfil. To connect all the necessary equipment, a connection board was constructed, and some additional hardware was acquired for the system to be able to perform all the necessary tasks. The whole controlling system was also put in a small enclosure to make it portable. The control-system software was written in C++ using the Pigpio library. The developed system was then tested, and the results were compared to a commercially available Instron 8802 device. A comparison of the results shows that the upgraded equipment can produce comparable results to commercially available devices and is sufficiently accurate to be applied for research purposes for the characterization of soft tissues and other materials.

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Engsberg, J. R., J. W. Standeven, T. L. Shurtleff, J. M. Tricamo, and W. M. Landau. "Spinal cord and brain injury protection: testing concept for a protective device." Spinal Cord 47, no. 8 (February 17, 2009): 634–39. http://dx.doi.org/10.1038/sc.2009.1.

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Sekuła, Krzysztof, and Andrzej Świercz. "Weigh-in-Motion System Testing." Key Engineering Materials 518 (July 2012): 428–36. http://dx.doi.org/10.4028/www.scientific.net/kem.518.428.

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The paper presents some results of research on the Weight-in-motion (WIM) system. The device is used for identification of loads on the road surface generated by traveling vehicles. The proposed approach utilizes the piezoelectric measurement techniques to monitor strain development in a deformable body and eventually these measurements are used for tire-pavement load identification. An advantage of the proposed concept is that no additional limitation for a vehicle velocity and direction is required in order to make the measurement feasible. The device allow to identify many parameters which can be stored for statistical and planning purposes. When an overload or an exceed in speed limit is detected the data can be sent for penalization purposes. The research includes a computer simulation of the bending plate detector using the Finite Element Method (FEM). Its objective is to validate the concept as well as to test some factors which are important with respect to the proposed load identification methodology. An experimental research involved field tests on the WIM system using a bending plate detector and inductive loops to detect a vehicle.

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Zhou, Yi, Meng Cui, Dequan Zhou, Xiaojia Wang, and Xiao Fu. "Meso-Experimental Study on Tensile Characteristics of Clay." Advances in Civil Engineering 2021 (March 29, 2021): 1–16. http://dx.doi.org/10.1155/2021/8875903.

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This paper presents an experimental study on the meso-structure change of clay using an innovative testing system. It aims to evaluate the tensile characteristics of clay. The testing system designed in this paper includes a tensile loading device, an image acquisition device, and an image processing program, which can collect and process the meso-structural images of the soil sample and predict the location of tensile fracture zone with a small preloading. The tests were conducted with three different observation zones, including the tensile fracture zone (Zone 1), the adjacent area of tensile fracture zone (Zone 2), and the areas away from the tensile fracture zone (Zone 3). The results show that the development of cracks is continuous but not linear until tensile failure in Zone 1, and the cracks emerge but stop developing in Zone 2 with the penetration of the cracks in Zone 1, while there is only an overall deviation without any cracks in Zone 3. The variety of mesostructural quantitative parameters in Zone 1 can be divided into three stages: stable stage, rapid change stage, and failure stage. The changes of parameters in Zone 2 show a similar law with those in Zone 1, but the variation is smaller due to the cessation of cracks. The parameters in Zone 3 essentially remain unchanged throughout the whole procedure. According to the test results, the whole stretching process of clay can be divided into the sprouting, the development, and the penetration of cracks.

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Cao, Qing Song, Dan Liu, Ji Hui Zhou, and Jian Min Zhou. "Concept of Active Measurement." Key Engineering Materials 467-469 (February 2011): 748–53. http://dx.doi.org/10.4028/www.scientific.net/kem.467-469.748.

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In an ideal situation, good measuring system can be designed if exact information is known concerning performance and structures involved during the lifetime of the measuring object. But in the real world uncertainties of object exist in this information as well as in the method of measurement. To account for these uncertainties, concept of active measurement has been presented in this paper. Nowadays, scale transform and smart sensor have been applied for realizing elementary active measurement technique, the objective herein is to present measuring method of actively adjusting structure based on these factors. The practicality of this concept is illustrated with an engineering system using wire rope nondestructive testing device, double-point measurement device with eddy current probe as sensors is designed. Mathematical model of the rope’s characteristics and real-time quantity to trim of measure device is established according to relative spacing between sensors and rope. The idea of active control is introduced here, adjusting instrument structure timely based on mathematical relationships and feedback information will achieve the active measurement.

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Andrusca, Liviu, Ioan Doroftei, Paul Doru Barsanescu, Viorel Goanta, and Adriana Savin. "Design of a Testing Device for Cruciform Specimens Subjected to Planar Biaxial Tension." Applied Mechanics and Materials 809-810 (November 2015): 700–705. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.700.

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Multiaxial experiments are necessary to determine materials behavior subjected to complex stress state corresponding to real operating conditions under complex loadings. Stresses applied in biaxial experiments are closely to the stresses that materials experience during their function life. Because of reduced acquisition cost, operation cost and maintenance costs devices attached to the universal testing machine are beginning to be used in ever more applications. The present paper examines a new type of mechanism used to test biaxial cruciform specimens in order to evaluate stress state in planar biaxial tensile testing.

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GORDON, L., F. A. DYSARZ, K. T. VENKATESWARA, A. P. MOK, R. O. RITCHIE, and S. RABINOWITZ. "Flexor Tendon Repair Using a Stainless Steel External Splint." Journal of Hand Surgery 24, no. 6 (December 1999): 654–57. http://dx.doi.org/10.1054/jhsb.1999.0287.

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A stainless steel external tendon splint was used in repair of cadaver tendons and compared with standard tendon repairs with suture. The splint was combined with a Kessler repair and tested against the Kessler, Becker, and Savage repairs in fresh human cadaver flexor digitorum profundus tendons. Biomechanical testing was done on a tensile testing machine, and load-displacement curves were generated. The repairs using the external tendon splint demonstrated a range of improvement of 32 to 146% in mean maximal tensile strength and a 20 to 185% improvement of mean ultimate tensile strength compared with all other repairs. The external tendon splint is relatively easy to apply to a tendon. The repair is strengthened and becomes capable of withstanding early active range of motion excercises. In vivo testing will be needed to assess the potential clinical usefulness of such a device.

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Ravichandran, Rajganesh, Raveena Pachal Balakrishnan, Jaya Shree Dilli Batcha, Abarna Lakshmi Ravi, and Nikhil Cherian Sam. "Medical device: a complete overview." International Journal of Clinical Trials 7, no. 4 (October 20, 2020): 285. http://dx.doi.org/10.18203/2349-3259.ijct20204487.

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<p class="abstract">Medical device means any instrument, apparatus, machine, appliance, implant, reagent for in vitro use, software, material or other similar or related article, intended by the manufacturer to be used, alone or in combination, for human beings, for one or more of the specific medical purpose. Medical devices are generally classified based on risks; the actual risk-based classification of the medical device depends upon its intended use and purpose.<strong> </strong>Development of an entirely new device typically begins with a concept by a physician or bioengineer for a solution to a medical problem. If the idea is determined to be workable and practical (proof of concept) an early design of the device, known as a prototype, will be built. A prototype device will undergo a cycle of preclinical testing, redesigning, preclinical testing of the redesign and so forth, until the design has been refined and tested to a point that it is ready for production and testing in humans. Preclinical animal tastings are conducted to provide reasonable evidence that novel technologies and therapies are safe and effective. When studying medical devices, clinical trials are not always required, and whether or not one will be conducted depends on a risk assessment. Post marketing surveillance is the practice of monitoring the safety of a medical device after it has been released on the market.</p>

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