Adaptation of a Servohydraulic Testing Machine to Investigate the Life of Machine Components Operating under Fretting Conditions

The present research work is a part of a project was a semi-active structural control technique using magneto-rheological damper has to be performed. Magneto-rheological dampers are an innovative class of semi-active devices that mesh well with the demands and constraints of seismic applications; this includes having very low power requirements and adaptability. A small stroke magneto-rheological damper was mathematically simulated and experimentally tested. The damper was subjected to periodic excitations of different amplitudes and frequencies at varying voltage. The damper was mathematically modeled using parametric Modified Bouc-Wen model of magneto-rheological damper in MATLAB/SIMULINK and the parameters of the model were set as per the prototype available. The variation of mechanical properties of magneto-rheological damper like damping coefficient and damping force with a change in amplitude, frequency and voltage were experimentally verified on INSTRON 8800 testing machine. It was observed that damping force produced by the damper depended on the frequency as well, in addition to the input voltage and amplitude of the excitation. While the damping coefficient (c) is independent of the frequency of excitation it varies with the amplitude of excitation and input voltage. The variation of the damping coefficient with amplitude and input voltage is linear and quadratic respectively. More ever the mathematical model simulated in MATLAB was in agreement with the experimental results obtained.

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Testing Machine Learning Classifiers based on Compositional Metamorphic Relations

International Journal of Performability Engineering ◽

10.23940/ijpe.20.01.p8.6777 ◽

2020 ◽

Vol 16 (1) ◽

pp. 67

Author(s):

Minghua Jia ◽

Xiaodong Wang ◽

Yue Xu ◽

Zhanqi Cui ◽

Ruilin Xie

Keyword(s):

Machine Learning ◽

Testing Machine ◽

Machine Learning Classifiers ◽

Learning Classifiers

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Study of Bismuth Telluride Crystal Strength

Mechanical Engineering and Computer Science ◽

10.24108/0619.0001503 ◽

2019 ◽

pp. 1-8

Author(s):

A. A. Gorbatovskiy

Keyword(s):

Tensile Strength ◽

Bismuth Telluride ◽

Elasticity Modulus ◽

Testing Machine ◽

Bend Testing ◽

Instron Testing Machine ◽

Measurement Results ◽

Strength Tests ◽

Semiconductor Properties

The article presents results of strength tests of bismuth telluride prismatic samples obtained by growing crystals. These crystals have semiconductor properties and are used in the heat machines, the run-ability of which largely depends on the strength of crystals. Data available in the literature are significantly different from each other. It has been shown that, the most consistent strength tests results are obtained in case of bend testing. The measurement results of the elasticity modulus and tensile strength are given. For tests, an INSTRON testing machine with maximum direct stress of the 1000 H was used.

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On a New Rotating Bending Fatigue Testing Machine

Journal of the Society of Materials Science Japan ◽

10.2472/jsms.15.49 ◽

1966 ◽

Vol 15 (148) ◽

pp. 49-54

Author(s):

Minoru KAWAMOTO ◽

Katsumi SUMIHIRO ◽

Koji KIDA

Keyword(s):

Fatigue Testing ◽

Testing Machine ◽

Bending Fatigue ◽

Rotating Bending Fatigue ◽

Rotating Bending

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Pengembangan Mesin Pencacah Sampah/Limbah Plastik Dengan Sistem Crusher dan Silinder Pemotong Tipe Reel

Jurnal Ilmiah Poli Rekayasa ◽

10.30630/jipr.10.2.12 ◽

2015 ◽

Vol 10 (2) ◽

pp. 66

Author(s):

Junaidi - ◽

Ichlas Nur ◽

Nofriadi - ◽

Rusmardi -

Keyword(s):

Testing Machine ◽

Engine Performance ◽

Performance Testing ◽

Injection Molding Process ◽

Molding Process ◽

Recycling Industry ◽

Performance Improvements ◽

Plastic Recycling ◽

Technical Evaluation ◽

Lower Frame

Waste plastic mounting, but can be recycled into other products in the form of granules before further processed into pellets and seed injection molding process produces products such as buckets, plates, bottles and other beverages. To be processed into the required form of granules of plastic thrasher. Though so small plastic recycling industry is still constrained in plastic enumeration process because the machine used was not optimal ability. The purpose of this research is the development of the system thrasher plastic crusher and cutter cylinder-type reel and technical evaluation. This study was conducted over two years, the first year the design and manufacture of machinery, the second year is a technical evaluation of the engine, engine performance improvements and economic analysis of granular plastic products.From the results obtained engine design capacity of the machine ± 350 kg / h, the engine size is 50 cm x 120 cm x 30 cm, power motor of 10 HP at 1450 RPM rotation with 3 phase. Some of the major components of the engine that is, counter crusher unit consists of two counter rotating cylinders opposite, counter shaft size Ø 4 cm x 58 cm, blade chopper Ø 17 cm x 2 cm with the number of teeth / blades 7 pieces and the number of blades along shaft 7 pieces, buses retaining Ø 10 cm x 2 cm. Counter-cylinder unit consists of a reel-type cutter counter shaft size Ø 4 cm x 90 cm, the middle shaft mounted cylinder with Ø 17 cm x 40 cm as the holder of the chopper blades. Chopper blade consists of 4 pieces with a size of 40 cm x 2 cm x 4 cm with ASSAB materials. Furthermore, as the blade retaining bedknife shear force of the blade chopper, upper frame, lower frame, strainer, funnel entry, exit funnel, and the drive unit consists of an electric motor, reducer, belts, pulleys and 2 pieces of gear transmission. The results of performance testing machine crusher round cylinder 75 RPM and 1450 RPM reel-type cutting machine capacity ± 300 kg / h on the filter hole Ø 1.5 cm, with a 80% grain uniformity.

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