Motion Analysis of Torsional Testing Machine to Reduce Impact Load Using SOLIDWORK

2021 ◽  
Vol 9 (8) ◽  
pp. 2213-2217
Author(s):  
Mr. Bharat Ashok Tare
Keyword(s):  
Motion Analysis ◽  
Impact Load ◽  
Testing Machine ◽  
Cost Effective ◽  
Rubber Stopper ◽  
Testing Specimen ◽  
Torsion Testing ◽  
Motion Study ◽  
Torsional Testing ◽  
Metal Wires

Abstract: Mechanical testing is a standard and essential part of any design and manufacturing process, for ensuring safe working of mechanical component and for ensuring a cost-effective design. Torsion Testing Machine is designed for conducting Torsion and Twist on various metal wires, tubes, sheet materials, torque measurement, in this torque can be applied to testing specimen by geared motor through gear box. But the main difficulty with analytical torsion testing machine is that after test is complete and specimen breaks the trolley on which the test specimen is clamped it can impacted heavily to the rubber stopper mounted on the guide ways of the machine which distort the machine assembly. In this study motion study is done, using SOLIDWORK software by introducing spring at the place of stopper and try to minimise this impact load of the trolley on the machine. Keywords: Torsion testing, Motion analysis, impact load, spring design, SOLIDWORK software

scholarly journals Pressure Sensor System for Customized Scoliosis Braces

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1153
Author(s):  
Franz Konstantin Fuss ◽  
Asliza Ahmad ◽  
Adin Ming Tan ◽  
Rizal Razman ◽  
Yehuda Weizman
Keyword(s):  
Pressure Sensor ◽  
Testing Machine ◽  
Force Plate ◽  
Cost Effective ◽  
Mobile Systems ◽  
Sensor System ◽  
Closed Cell ◽  
Hard Shell ◽  
Energy Absorbers ◽  
Material Testing Machine

Hard-shell thoracolumbar sacral orthoses (TLSOs) are used for treating idiopathic scoliosis, a deformation of the spine with a sideways curvature. The pressure required inside the TLSO for ideal corrective results remains unclear. Retrofitting TLSOs with commercially available pressure measurement systems is expensive and can only be performed in a laboratory. The aim of this study was to develop a cost-effective but accurate pressure sensor system for TLSOs. The sensor was built from a piezoresistive polymer, placed between two closed-cell foam liners, and evaluated with a material testing machine. Because foams are energy absorbers, the pressure-conductance curve was affected by hysteresis. The sensor was calibrated on a force plate with the transitions from loading to unloading used to establish the calibration curve. The root mean square error was 12% on average within the required pressure range of 0.01–0.13 MPa. The sensor reacted to the changing pressure during breathing and different activities when tested underneath a chest belt at different tensions. The peak pressure reached 0.135 MPa. The sensor was further tested inside the scoliosis brace during different activities. The measured pressure was 0.014–0.124 MPa. The results from this study enable cheaper and mobile systems to be used for clinical studies on the comfort and pressure of braces during daily activities.

Large triaxial-torsional testing machine with hygrothermal control

1986 ◽  
Vol 19 (4) ◽  
pp. 285-294
Author(s):  
Z. P. Bažant ◽  
S. Prasannan ◽  
M. Hagen ◽  
S. Meiri ◽  
R. Vaitys ◽  
...  
Keyword(s):  
Testing Machine ◽  
Torsional Testing

Design of 80000N·m Torsion Testing Machine

2014 ◽  
Vol 607 ◽  
pp. 350-353
Author(s):  
Wei Li Yu
Keyword(s):  
Control System ◽  
Power Unit ◽  
Testing Machine ◽  
Electronic Control ◽  
Control Manner ◽  
Torsion Testing ◽  
Mechanical Structure ◽  
Electronic Control System

The article introduce the mechanical structure and the principles of 80000 N·m torsion testing machine, the structure and the principles of checking power unit of this kind of testing machines and the control manner and the principles of the electronic control system, than expound the benefits of the equipment and its application.

scholarly journals Method for Evaluating Potential Maximum Shear Strain for a Fine Metal Wire in Torsion Testing

2020 ◽  
Author(s):  
S. Gondo ◽  
H. Akamine ◽  
R. Mitsui ◽  
S. Kajino ◽  
M. Asakawa ◽  
...  
Keyword(s):  
Shear Strain ◽  
Strain Distribution ◽  
High Carbon Steel ◽  
Testing Machine ◽  
External Factors ◽  
Maximum Shear Strain ◽  
Internal Factors ◽  
Torsion Testing ◽  
The Difference ◽  
Potential Maximum

Abstract The torsion number of drawn fine high carbon steel wires was measured through torsion testing. The angles between the scratches on the tested wire surface and its longitudinal axis were measured. The shear strain calculated from torsion number γt, shear strain at fractured point γf, and plastic shear strain γpc were evaluated. The following results were obtained. First, the shear strain distribution homogenized; further, torsion number per unit length N, γt, and γpc increased when decreasing the difference between γf and γpc where γpc subtracted from γf (=Δγfpc) > 0. Second, the external factors caused non-uniform shear strain distribution and reduction from the potential maximum shear strain, even for the wire that was hardly affected by the internal factors. The difference of shear strain non-uniformity caused a variation in reduction from the potential maximum shear strain. The internal factors included non-uniform microstructure and existence of inclusions and voids. The external factors were caused by the testing machine and setting of the sample. The potential maximum shear strain was obtained when the effects of internal and external factors were inhibited. Finally, two evaluation methods of the potential maximum shear strain were suggested. One method identifies a sample with a small Δγfpc, and a large γpc where Δγfpc > 0. This sample can be regarded as having the closest strain to the potential maximum shear strain. The other method determines γpc when Δγfpc is closest to 0. This value can be interpreted as plastic strain of the potential maximum shear strain.

Study on Welding Process of Clutch Wheel-Hub Weldment Using Vacuum Electron Beam Welding

2012 ◽  
Vol 190-191 ◽  
pp. 187-190
Author(s):  
De Quan Wang
Keyword(s):  
Electron Beam ◽  
Vickers Hardness ◽  
Electron Beam Welding ◽  
Testing Machine ◽  
Welding Process ◽  
Difficult Problem ◽  
Technological Parameters ◽  
Welding Seam ◽  
Hardness Tester ◽  
Torsional Testing

Abstract. In order to resolve the manufacturing difficult problem of a new kind of clutch wheel-hub weldment of a new type of engineering machinery, and ensure the manufacturing precision and welded joint quality, a new manufacturing process was studied using vacuum electron beam welding (VEBW) for the manufacturing of this component. Static torsional strength was measured on static torsional testing machine. Microstructure morphologies of welding seam and heat affected zone were analyzed using scanning electron microscope. Vickers-hardness values of welding seams and heat affected zones were measured using Vickers-hardness tester. As a result, the welding process and the optimum technological parameters of VEBW of the weldment were obtained.

Design of an Active Control Engine Mount Using a Direct Drive Electrodynamic Actuator

2007 ◽  
Author(s):  
Hyunki Park ◽  
Bo-Ha Lee ◽  
Chong-Won Lee
Keyword(s):  
Active Control ◽  
Control Algorithm ◽  
Active Element ◽  
Testing Machine ◽  
Cost Effective ◽  
Control Performance ◽  
Direct Drive ◽  
Feed Forward Control ◽  
Transmitted Force ◽  
Engine Mount

This paper is focused on design of a new active control engine mount (ACM), which is both compact in size and cost effective. The ACM, consisting of an electrodynamic actuator as the active element, flat springs and a sliding ball joint, is different in structure from the previous ACM designs based on the conventional hydraulic engine mount. Dynamic characteristics of the proposed ACM are extensively investigated before a prototype ACM, which meets the design specifications, is built in the laboratory. For cost effectiveness, a feed-forward control algorithm without a feedback sensor is used for reduction of the transmitted force through the ACM by the engine. The prototype ACM is then harmonic-tested with a rubber testing machine for verification of its control performance as well as adequacy of modeling. Experimental results show that the proposed ACM is capable of reducing the transmitted force by 20 dB up to the frequency range of 60 Hz.

Mechanical Property of CFRP by Carbon Spray Up Method

2013 ◽  
Author(s):  
Tetsuo Kikuchi ◽  
Akira Fudauchi ◽  
Tetsushi Koshino ◽  
Chieko Narita ◽  
Atsushi Endo ◽  
...  
Keyword(s):  
Motion Analysis ◽  
New Technology ◽  
Sampling Rate ◽  
Testing Machine ◽  
Human Motion ◽  
Molding Method ◽  
Composite Molding ◽  
The Matrix ◽  
Cfrp Composite ◽  
The Difference

Spray up method is one of methods for composite molding and it is traditional and common molding method that can deal with various shapes according to workmen skill. The essence of the composite molding impregnates resin to fiber;, in other words, is to substitute air included in the fiber for resin. Spray up method can spray matrix on mold together while cutting reinforcements continually, and the cutting of the reinforcement, setting up and the impregnation of the matrix are carried out at the same time. That is why working process is made efficiency and can cope with a design change easily. However, the quality of the composites depends on the techniques of workmen and the judgment with Spray up technique is too difficult, because it has not clarified that the difference of that techniques has how influence with manufactured products. In addition, in a spray up method, glass reinforcements is usually used, but carbon reinforcements is not put to practical use. High quality is required with the CFRP composite, and this is because it is thought that techniques of Spray up method does not satisfy this demand. In this study, motion analysis was used to compare the difference between Spray up techniques by expert and non-expert. Expert’s carrier of Spray up was 19 years and non-expert’s carrier was a year. Motion analysis, which is applied to various fields like sports or traditional crafts and so on, can visualize human motion. The Mac 3D System was used as equipment, since it is the most powerful tool for the motion capture and analysis particularly. The sampling rate was 60 Hz. The object of this study was to contribute that technique back to fabrication fields by analyzing and considering what was important factor. Furthermore, this trial is thought that leads to the development of new technology. As the result, the motion of expert’s lower half of body indicated different motion compared with non-expert one. Expert’s centroid moved smoothly and his motion showed constant tendency. On the other hand, non-expert’s motion was awkward in several points and his motion didn’t show the tendency like expert. Furthermore, The CFRP structures that manufactured with Spray up method are cut for the tensile testing. Tensile test were performed by using an Instron universal testing machine under a speed 1mm/min. Spray up technique is discussed based on the motion analysis method and moreover it is shown that Spray up method is useful in CFRP materials production.

scholarly journals Washable Colorimetric Nanofiber Nonwoven for Ammonia Gas Detection

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1585 ◽  
Author(s):  
Hyun Ju Oh ◽  
Byeong Jin Yeang ◽  
Young Ki Park ◽  
Hyun Jung Choi ◽  
Jong H. Kim ◽  
...  
Keyword(s):  
Gas Flow ◽  
Testing Machine ◽  
Laundry Detergent ◽  
Cost Effective ◽  
Colorimetric Sensor ◽  
Green Energy ◽  
Gas Detection ◽  
Colorimetric Sensing ◽  
Ammonia Gas ◽  
Energy Sensor

The colorimetric sensor is a facile, cost-effective, and non-power-operated green energy material for gas detection. In this study, the colorimetric sensing property of a meta-aramid/dye 3 nanofiber sensor for ammonia (NH3) gas detection was investigated. This colorimetric sensor was prepared using various dye 3 concentrations via electrospinning. Morphological, thermal, structural, and mechanical analyses of the sensor were carried out by field-emission scanning electron microscopy, thermogravimetric analysis, Fourier-transform infrared spectroscopy, and a universal testing machine, respectively. A homemade computer color matching machine connected with a gas flow device characterized the response of the meta-aramid/dye 3 nanofiber colorimetric sensor to various exposure levels of NH3 gas. From the results, we confirmed that this colorimetric green energy sensor could detect ammonia gas in the concentration of 1–10 ppm with a sensing response time of 10 s at room temperature. After washing with laundry detergent for 30 min, the colorimetric sensors still exhibited sensing property and reversibility.

Effect of Acrylic Foam Film on Impact Reduction

2016 ◽  
Vol 715 ◽  
pp. 107-110
Author(s):  
Kyohei Takeo ◽  
Taichi Nogami ◽  
Tadaharu Adachi ◽  
Ryohei Koretoh ◽  
Hitoshi Tada
Keyword(s):  
Thin Films ◽  
Impact Load ◽  
Testing Machine ◽  
Research Impact ◽  
Foam Films ◽  
Impact Reduction ◽  
Foam Film ◽  
Reduction Effect ◽  
Falling Weight ◽  
The Impact

Recently, Thin Foam Films are Applied to Cushion Materials on Various Instruments, such as Mobile Phones, Tablet Computers, Etc. because of Reducing Load due to Drop Impact or Collision. Testing Methods of the Thin Films must Be Established to Estimate Effect of Thin Films on Reduction of the Impact Load. in this Research, Impact Reduction Effect of the Acrylic Foam Film with a Thickness below 1000μm was Clarified by Developing a Falling Weight Testing Machine. Maximum Value of the Impact Load Decreased Dominantly and the Plateau Region was Longer as the Thickness Increased. the Duration of the Load was Longer for the Thicker Film. Therefore, the Thin Acrylic Foam Films were Found to Be Effective in the Reduction of the Large Impact Load over 20 Kn.

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