Methodology and results of an investigation into the strength of composite materials in torsion at high temperatures (to 3300 K)

Dzyuba, V. S.; Kravchuk, L.; Kuriat, R. I.; Oksiyuk, S. V.; Tokarskii, V. A.

doi:10.1007/s11029-011-9203-0

Mech Compos Mater

2011

DOI: 10.1007/s11029-011-9203-0

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Methodology and results of an investigation into the strength of composite materials in torsion at high temperatures (to 3300 K)

V. S. Dzyuba

L. Kravchuk

R. I. Kuriat

et al.

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“…Torsion tests of two specimens made of the same material but with different cross-section are carried out. From formulas (5), (6) it follows that …”

mentioning

confidence: 99%

“…To check the efficiency of this procedure, experiments have been carried out on a facility described earlier [6]. The adopted specimen design (Fig.…”

mentioning

confidence: 99%

“…1) does not permit one to use the whole test portion (l) in calculation to find Θ from formulas (3), (14), (15) owing to the action of edge effects. Therefore, to determine the design length of the specimen test portion (l d ), a methodical experiment has been carried out at T = 293 K on the facility described in [6]. Along the test portion length of the specimen, l = 50 mm, light-emitting diodes were mounted rigidly on one of its sides, whose beams were turned upon a screen.…”

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Procedure for the determination of torsional deformation relationships for anisotropic materials

Dzyuba

Kravchuk

2009

Strength Mater

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To calculate the stress-strain and limiting states of anisotropic materials and structural members made of them, one must know Young's modulus (E), shear modulus (G), Poisson's ratios (μ), tensile, compressive, and torsional deformation curves. One of the methods of finding torsional modulus (G) is the computational-experimental method [1-3], which enables one to determine the elastic moduli G 1 and G 2 for on anisotropic material on prismatic specimens. An advantage of the method lies in the use of simple shape of specimens and the possibility of determining G 1 and G 2 from the results of two or three experiments carried out under the same loading conditions (mechanical and thermal loading).Below is proposed a procedure for the determination of torsional deformation relationships for prismatic specimens made of anisotropic materials and construction of deformation curves under these conditions. Its distinction from the procedure reported in [2,3] consists in the utilization and processing of the results of studies [4,5] on the loading of a prismatic bar.The torsion experiments were carried out on specimens made of a carbon/carbon composite (CCC) (Fig. 1) according to the scheme shown in Fig. 2.In the course of experiment, the load P and the rotation angle of specimen ϕ were recorded. Tangential stresses τ, shearing angle h, torsional moduli G (G 1 , G 2 ) were determined using the relations [5]:

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“…Torsion tests of two specimens made of the same material but with different cross-section are carried out. From formulas (5), (6) it follows that …”

mentioning

confidence: 99%

“…To check the efficiency of this procedure, experiments have been carried out on a facility described earlier [6]. The adopted specimen design (Fig.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Procedure for the determination of torsional deformation relationships for anisotropic materials

Dzyuba

Kravchuk

2009

Strength Mater

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Methodology and results of an investigation into the strength of composite materials in torsion at high temperatures (to 3300 K)

Cited by 1 publication

References 2 publications

Procedure for the determination of torsional deformation relationships for anisotropic materials

Procedure for the determination of torsional deformation relationships for anisotropic materials

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