scholarly journals Study of the true tensile stress-strain diagram of plain concrete with real size aggregate ; need for and design of a large Hopkinson bar bundle

1994 ◽  
Vol 04 (C8) ◽  
pp. C8-113-C8-118 ◽  
Author(s):  
C. Albertini ◽  
M. Montagnani
Keyword(s):  
Tensile Stress ◽  
Plain Concrete ◽  
Hopkinson Bar ◽  
Strain Diagram ◽  
Stress Strain ◽  
Real Size

Tensile Mechanical Properties of AM50A Alloy by Hopkinson Bar

2007 ◽  
Vol 340-341 ◽  
pp. 247-254 ◽  
Author(s):  
Dong Wei Shu ◽  
Wei Zhou ◽  
Guo Wei Ma
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Tensile Stress ◽  
Strain Rate ◽  
Automotive Industry ◽  
Dynamic Stress ◽  
Hopkinson Bar ◽  
Strain Rates ◽  
Stress Strain ◽  
Stress Strain Relation

An ultralight magnesium alloy AM50A has been investigated for its potential to be used in aerospace and automotive industry. The dynamic stress strain relation of aluminum 6061 T6 and the magnesium alloy AM50A have been obtained by using the Hopkinson bar apparatus. The strain rates range between 600 s-1 and 1300 s-1. The Al 6061 T6 results tally well with those in literature. The magnesium alloy AM50A displays about 50% higher tensile stress at the strain rate of about 1300 s-1 than at static.

scholarly journals Combining Thermal Loading System with Acoustic Emission Technology to Acquire the Complete Stress-Deformation Response of Plain Concrete in Direct Tension

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 602
Author(s):  
Rui Zhang ◽  
Li Guo ◽  
Wanjin Li
Keyword(s):  
Acoustic Emission ◽  
Tensile Stress ◽  
Testing Machine ◽  
Plain Concrete ◽  
Acquisition System ◽  
Direct Tension ◽  
Stress Strain ◽  
Deformation Response ◽  
Damage Process ◽  
Dynamic Acquisition

The tensile properties of plain concrete are very important for the concrete structural design, and the complete tensile stress-strain curve is essential for creating accurate and reliable designs, especially when considering special load cases such as earthquakes and impacts. To study the complete tensile stress-deformation response of plain concrete, the direct tension tests were conducted on a novel thermal tensile testing machine (TTTM), which was reformed from a hydraulic universal testing machine (UTM). Acoustic emission (AE) technology was applied to monitor the damage process of plain concrete in tests. The TTTM was powered by the thermal expansion of loading columns, and had a stiffness similar to the specimen, thus eliminating the potential AE noises in the UTM, and simulating the rapid fracture process in real concrete structures. A static-dynamic acquisition system was established to obtain the complete tensile stress-strain curves, of which the data before and at the fracture moment were respectively acquired by the static acquisition system and the dynamic acquisition system. The AE technology is a useful approach to analyze the damage process of concrete, and makes it feasible to determine the damage state and the fracture location of the specimen in real time.

A tensile stress-strain diagram of steel 40KhN after a surface temper

1987 ◽  
Vol 29 (1) ◽  
pp. 74-76
Author(s):  
A. K. Volkov ◽  
G. P. Ivanov ◽  
P. K. Khodzher ◽  
K. V. Dvoyashov ◽  
Yu. M. Levin
Keyword(s):  
Tensile Stress ◽  
Strain Diagram ◽  
Stress Strain ◽  
Steel 40Khn

scholarly journals Stress–strain relationship model of glulam bamboo under axial loading

2020 ◽  
Vol 29 ◽  
pp. 2633366X2095872
Author(s):  
Yang Wei ◽  
Mengqian Zhou ◽  
Kunpeng Zhao ◽  
Kang Zhao ◽  
Guofen Li
Keyword(s):  
Tensile Stress ◽  
Compressive Stress ◽  
Failure Modes ◽  
Axial Loading ◽  
Tensile Failure ◽  
Stress Strain ◽  
Laminated Bamboo ◽  
Bamboo Scrimber ◽  
Strain Relationship ◽  
Strain Model

Glulam bamboo has been preliminarily explored for use as a structural building material, and its stress–strain model under axial loading has a fundamental role in the analysis of bamboo components. To study the tension and compression behaviour of glulam bamboo, the bamboo scrimber and laminated bamboo as two kinds of typical glulam bamboo materials were tested under axial loading. Their mechanical behaviour and failure modes were investigated. The results showed that the bamboo scrimber and laminated bamboo have similar failure modes. For tensile failure, bamboo fibres were ruptured with sawtooth failure surfaces shown as brittle failure; for compression failure, the two modes of compression are buckling and compression shear failure. The stress–strain relationship curves of the bamboo scrimber and laminated bamboo are also similar. The tensile stress–strain curves showed a linear relationship, and the compressive stress–strain curves can be divided into three stages: elastic, elastoplastic and post-yield. Based on the test results, the stress–strain model was proposed for glulam bamboo, in which a linear equation was used to describe the tensile stress–strain relationship and the Richard–Abbott model was employed to model the compressive stress–strain relationship. A comparison with the experimental results shows that the predicted results are in good agreement with the experimental curves.

Tensile stress-strain behavior of lightly cemented sand

1993 ◽  
Vol 30 (7) ◽  
pp. 711-714 ◽  
Author(s):  
R.N. Dass ◽  
S.C. Yen ◽  
V.K. Puri ◽  
B.M. Das ◽  
M.A. Wright
Keyword(s):  
Tensile Stress ◽  
Stress Strain ◽  
Cemented Sand ◽  
Strain Behavior

scholarly journals Tensile Behaviour of FRCM Composites for Strengthening of Masonry Structures—An Experimental Investigation

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3626
Author(s):  
Łukasz Hojdys ◽  
Piotr Krajewski
Keyword(s):  
Tensile Stress ◽  
Strain Curve ◽  
Tensile Tests ◽  
Tensile Failure ◽  
Tensile Behaviour ◽  
Masonry Structures ◽  
Stress Strain ◽  
Flexural Tensile Strength ◽  
Cracking Pattern ◽  
Direct Tensile

This paper presents the results of direct tensile tests performed on six different FRCM (fabric reinforced cementitious matrix) strengthening systems used for masonry structures. The emphasis was placed on the determination of the mechanical parameters of each tested system and a comparison of their tensile behaviour in terms of first crack stress, ultimate stress, ultimate strain, cracking pattern, failure mode and idealised tensile stress-strain curve. In addition to the basic mechanical tensile parameters, accidental load eccentricities, matrix tensile strengths, and matrix modules of elasticity were estimated. The results of the tests showed that the tensile behaviour of FRCM composites strongly depends on the parameters of the constituent materials (matrix and fabric). In the tests, tensile failure of reinforcement and fibre slippage within the matrix were observed. The presented research showed that the accidental eccentricities did not substantially affect the obtained results and that the more slender the specimen used, the more consistent the obtained results. The analysis based on a rule of mixtures showed that the direct tensile to flexural tensile strength ratio of the matrixes used in the test was 0.2 to 0.4. Finally, the tensile stress–strain relationship for the tested FRCMs was idealised by a bi- or tri-linear curve.

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