Experimental Characterization of Mechanical Behavior of Cord-Rubber Composites

1982 ◽  
Vol 10 (1) ◽  
pp. 37-54 ◽  
Author(s):  
M. Kumar ◽  
C. W. Bert
Keyword(s):  
Response Characteristic ◽  
Cord Compression ◽  
Complete Characterization ◽  
Strain Response ◽  
Strain Gages ◽  
Experimental Characterization ◽  
Rubber Composites ◽  
Stress Strain ◽  
Strain Data

Abstract Unidirectional cord-rubber specimens in the form of tensile coupons and sandwich beams were used. Using specimens with the cords oriented at 0°, 45°, and 90° to the loading direction and appropriate data reduction, we were able to obtain complete characterization for the in-plane stress-strain response of single-ply, unidirectional cord-rubber composites. All strains were measured by means of liquid mercury strain gages, for which the nonlinear strain response characteristic was obtained by calibration. Stress-strain data were obtained for the cases of both cord tension and cord compression. Materials investigated were aramid-rubber, polyester-rubber, and steel-rubber.

Characterization of Hyperelastic (Rubber) Material Using Uniaxial and Biaxial Tension Tests

2012 ◽  
Vol 570 ◽  
pp. 1-7
Author(s):  
Yawar Jamil Adeel ◽  
Ahsan Irshad Muhammad ◽  
Azmat Zeeshan
Keyword(s):  
Shear Test ◽  
Biaxial Tension ◽  
Constitutive Models ◽  
Hyperelastic Material ◽  
Strain Response ◽  
Stress Strain ◽  
Rubber Material ◽  
Tension Tests ◽  
Planar Shear

Hyperelastic material simulation is necessary for proper testing of products functionality in cases where prototype testing is expensive or not possible. Hyperelastic material is nonlinear and more than one stress-strain response of the material is required for its characterization. The study was focused on prediction of hyperelastic behavior of rubber neglecting the viscoelastic and creep effects in rubber. To obtain the stress strain response of rubber, uniaxial and biaxial tension tests were performed. The data obtained from these tests was utilized to find the coefficients of Mooney-Rivlin, Odgen and Arruda Boyce models. Verification of the behavior as predicted by the fitted models was carried out by comparing the experimental data of a planar shear test with its simulation using the same constitutive models.

Characterization of Strain Fields Around Weld Defects

1987 ◽  
Vol 109 (3) ◽  
pp. 226-229
Author(s):  
S. A. Chavez ◽  
V. A. Deason
Keyword(s):  
Surface Defect ◽  
Local Strain ◽  
Moiré Interferometry ◽  
Moire Interferometry ◽  
Strain Gages ◽  
Strain Fields ◽  
Full Field ◽  
Strain Data ◽  
Set Up

Moire interferometry is used as an alternate technique to resistance strain gages in finding full-field, local strain response of weldments to applied loads. The principles of moire interferometry and the experimental set-up are explained. Data from the two techniques are compared, with no major discrepancies. The strain field around a surface defect is analyzed using moire data. It is concluded that the moire technique is useful for obtaining full-field strain data in welds.

Quantitative Characterization of Cure. I. Relationship between Modulus and Strain of Pure-Gum Natural-Rubber Vulcanizates

1952 ◽  
Vol 25 (3) ◽  
pp. 430-439 ◽  
Author(s):  
R. F. Blackwell
Keyword(s):  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Quantitative Characterization ◽  
Strain Data ◽  
Tentative Explanation ◽  
Natural Rubber Vulcanizates ◽  
The Relationship ◽  
Mooney Equation

Abstract The object of this investigation was to determine whether the relationship between strain (elongation) and modulus is sufficiently close for one to be calculated from the other. Stress-strain data have been recorded for loads of 2–10 kg. per sq. cm. for a series of ACS1 and other pure-gum compounds. It is shown that the strain at a fixed stress (5 kg. per sq. cm.) is uniquely related to the load required to produce an elongation of 100 per cent. A tentative explanation of this observation is given in terms of the Mooney equation for the stress-strain curve. It is shown that the second constant of this equation does not vary greatly from rubber to rubber.

Accurate characterization of biaxial stress-strain response of sheet metal from bulge testing

2017 ◽  
Vol 94 ◽  
pp. 192-213 ◽  
Author(s):  
Junying Min ◽  
Thomas B. Stoughton ◽  
John E. Carsley ◽  
Blair E. Carlson ◽  
Jianping Lin ◽  
...  
Keyword(s):  
Sheet Metal ◽  
Biaxial Stress ◽  
Strain Response ◽  
Stress Strain ◽  
Bulge Testing

Identification of Cavitation Instabilities on a Three-Bladed Inducer by Means of Strain Gages

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Ruzbeh Hadavandi ◽  
Giovanni Pace ◽  
Dario Valentini ◽  
Angelo Pasini ◽  
Luca d'Agostino
Keyword(s):  
High Speed ◽  
Strain Gages ◽  
Experimental Characterization ◽  
Mechanism Of Formation ◽  
Pressure Transducers ◽  
Cavitation Region ◽  
Rotating Frames ◽  
Induced Flow ◽  
High Head

Abstract This paper reports the experimental characterization of the cavitation-induced flow instabilities of a high head three-bladed inducer at design condition detected simultaneously by means of piezoelectric pressure transducers located at different axial and azimuthal stations on the casing of the pump and strain gages mounted on the pressure side of each blade. The simultaneous analysis performed in the stationary and rotating frames, supported by high-speed movies, suggests that the mechanism of formation of the detected subsynchronous rotating cavitation resembles that of modal stall in compressors, being the cavitation region the source of compliance. In fact, at decreasing cavitation number, a strong attached cavitation, developed preferentially on one blade and capable of completely surrounding and unloading the following blade, starts to be destabilized as consequence of the progressive intensification of a modal oscillation. The developed complex instability, consisting in a strong oscillation of the attached cavitation, is detected in both the frames as the simultaneous presence of a subsynchronous rotating cavitation and a cavitation surge.

Viscoelastic Characterization of Long Branching and Gel in Elastomers by Comparison of Large and Small Deformational Behavior

1987 ◽  
Vol 60 (4) ◽  
pp. 742-760 ◽  
Author(s):  
N. Nakajima ◽  
J. J. Scobbo ◽  
E. R. Harrell
Keyword(s):  
Tensile Stress ◽  
Shear Behavior ◽  
Dynamic Shear ◽  
Stress Strain ◽  
Strain Behavior ◽  
Strain Data ◽  
Deformational Behavior ◽  
Varied Chemical ◽  
Reduced Data

Abstract Ten different raw elastomers of varied chemical structure and Mooney viscosity were characterized with both tensile stress-strain behavior and dynamic shear behavior. The room temperature tensile stress-strain behavior was determined at strain rates of 0.239, 0.0892, and 0.00653 sec−1. These stress-strain data were reduced with a use of strain-time correspondence principle. The dynamic-shear behavior was observed over the frequency range from 10−2 to 102 rad/s. Double logarithmic Cole-Cole plots were used to characterize a relative degree of long branching and gel content. The reduced data of tensile stress-strain measurements were compared to the data of dynamic measurements. From this comparison, the sample containing a long-range crosslinked network was differentiated from that containing microgel.

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