Multiaxial Testing Machine Frames: A Review of Recent Patents

2007 ◽  
Vol 1 (3) ◽  
pp. 273-281
Author(s):  
Sergio Baragetti
Keyword(s):  
Testing Machine ◽  
Multiaxial Testing

Triaxial fatigue testing machine for polymeric materials

1980 ◽  
Vol 15 (3) ◽  
pp. 159-173 ◽  
Author(s):  
C C Lawrence
Keyword(s):  
Fatigue Testing ◽  
Testing Machine ◽  
Polymeric Materials ◽  
Fatigue Loading ◽  
Static Stability ◽  
Multiaxial Fatigue ◽  
Test Procedures ◽  
Multiaxial Testing ◽  
Machine Structure ◽  
Strain Dependent

Part 1 of this paper is concerned with the design and development of a multiaxial fatigue testing machine. The machine structure is considered in some detail to emphasize the dynamic as well as the static stability essential in machines applying fatigue loading. The machine is capable of testing specimens of the same geometry in torsion, push-pull, and internal pressure (if hollow), either statically or dynamically. These test modes can be operated independently or in combination, both in phase and out of phase. Each mode can be stress or strain dependent. Part 2 deals with the associated extensometry, test procedures, and preliminary tests on polymethylmethacrylate. These preliminary tests, originally undertaken to test the capability of the machine, whilst not extensive enough to be considered rigorous, are included to illustrate some of the interesting potentialities of multiaxial testing.

Testing Machine at Watertown Arsenal, Mass

1886 ◽  
Vol 22 (548supp) ◽  
pp. 8753-8754
Author(s):  
J. E. Howard
Keyword(s):  
Testing Machine

Parametric Study of Damping Characteristics of Magneto-Rheological Damper: Mathematical and Experimental Approach

2020 ◽  
Vol 15 (3) ◽  
pp. 37-48
Author(s):  
Zubair Rashid Wani ◽  
Manzoor Ahmad Tantray
Keyword(s):  
Structural Control ◽  
Research Work ◽  
Testing Machine ◽  
Input Voltage ◽  
Damping Coefficient ◽  
Control Technique ◽  
Damping Force ◽  
Active Devices ◽  
Active Structural Control ◽  
Magneto Rheological

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.

Study of Bismuth Telluride Crystal Strength

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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