Monotonic Tension and Compression Stress-Strain Model for Longitudinal Reinforcement

2021 ◽  
Vol 33 (6) ◽  
pp. 551-559
Author(s):  
Seong-Hyun Ko ◽  
Jae-Hoon Lee
Keyword(s):  
Longitudinal Reinforcement ◽  
Compression Stress ◽  
Stress Strain ◽  
Tension And Compression ◽  
Strain Model

Tension—compression behaviour of annealed oxygen-free high-conductivity copper after strain cycling in the plastic range

1975 ◽  
Vol 10 (1) ◽  
pp. 10-18 ◽  
Author(s):  
P W J Oldroyd
Keyword(s):  
Bauschinger Effect ◽  
Strain Range ◽  
Compression Stress ◽  
Plastic Range ◽  
Stress Strain ◽  
Compression Properties ◽  
Compression Behaviour ◽  
Tension And Compression ◽  
Strain Cycling ◽  
Structural Strain

When copper is cycled between fixed limits of strain it ends towards a settled cyclic state. The two curves which form the tension-compression stress-strain loop will have the same shape but, no matter what point is chosen on the loop for the return to zero stress, the material will not be left with symmetrical tension-compression properties. This is because of the Bauschinger effect. It is demonstrated that the Bauschinger effect can be eliminated by cycling down to zero stress and zero strain using progressively decreasing strain amplitudes. Relatively few cycles suffice and, when the strain range is small, the structural strain-hardening effect is not noticeably reduced. Even with the largest range investigated (± 1 per cent plastic strain) the structural resoftening is slight. The significance of the subsequent tension and compression stress-strain curves is discussed.

CFRP-Confined Square RC Columns. II: Cyclic Axial Compression Stress-Strain Model

2012 ◽  
Vol 16 (2) ◽  
pp. 161-170 ◽  
Author(s):  
Zhenyu Wang ◽  
Daiyu Wang ◽  
Scott T. Smith ◽  
Dagang Lu
Keyword(s):  
Axial Compression ◽  
Compression Stress ◽  
Stress Strain ◽  
Rc Columns ◽  
Strain Model

Comparative Experimental Analysis of Different Bending Methods for the Mechanical Characterization of Materials with Previous Loading History (Stress-Strain Curves)

2011 ◽  
Vol 314-316 ◽  
pp. 1377-1382
Author(s):  
David Torres Franco ◽  
Guillermo Urriolagoitia-Sosa ◽  
Guillermo Urriolagoitia-Calderón ◽  
Luis Hector Hernandez Gomez ◽  
Beatriz Romero Angeles ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Compression Stress ◽  
Loading History ◽  
Stress Strain ◽  
Axial Tensile ◽  
Tension And Compression ◽  
Characterization Of Materials ◽  
Previous Loading

Until now, the most common way to obtain the stress-strain curves for a material is through axial tensile testing. However, in recent years there have been developments on alternative methods for material characterization. In this sense, the bending procedure has proved to be a powerful technique, which allows simultaneous determination of tension and compression stress behavior by the use of bending moment and strain data. The characterization of materials by means of bending data was presented for the first time in 1910 by the German engineer Herbert. Some years later Nadai and Marin developed some research on this procedure. More recently, several researchers (Mayville and Finnie, Laws and Urriolagoitia-Sosa, et.al.) have developed diverse bending methods for the simultaneous determination of tension and compression stress-strain curves. In this paper, three bending methods are analyzed and compared against axial tensile and compressive results. It was decided to apply each one of the bending procedures to bent rectangular cross sections beams made from 6063-T5 Aluminum alloy. The specimens were annealed to eliminate previous loading history and axially pulled to induce a controlled anisotropic behavior (strain hardening and Bauschinger effect). The results obtained by two of the three methods provided great confidence and have certified the application of this new technique to characterize material.

scholarly journals A General Temperature-Dependent Stress–Strain Constitutive Model for Polymer-Bonded Composite Materials

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1393
Author(s):  
Xiaochang Duan ◽  
Hongwei Yuan ◽  
Wei Tang ◽  
Jingjing He ◽  
Xuefei Guan
Keyword(s):  
Composite Materials ◽  
Constitutive Model ◽  
Model Parameters ◽  
Temperature Dependent ◽  
Stress Strain ◽  
Proposed Model ◽  
Single Temperature ◽  
Testing Data ◽  
Bonded Composite ◽  
Tension And Compression

This study develops a general temperature-dependent stress–strain constitutive model for polymer-bonded composite materials, allowing for the prediction of deformation behaviors under tension and compression in the testing temperature range. Laboratory testing of the material specimens in uniaxial tension and compression at multiple temperatures ranging from −40 ∘C to 75 ∘C is performed. The testing data reveal that the stress–strain response can be divided into two general regimes, namely, a short elastic part followed by the plastic part; therefore, the Ramberg–Osgood relationship is proposed to build the stress–strain constitutive model at a single temperature. By correlating the model parameters with the corresponding temperature using a response surface, a general temperature-dependent stress–strain constitutive model is established. The effectiveness and accuracy of the proposed model are validated using several independent sets of testing data and third-party data. The performance of the proposed model is compared with an existing reference model. The validation and comparison results show that the proposed model has a lower number of parameters and yields smaller relative errors. The proposed constitutive model is further implemented as a user material routine in a finite element package. A simple structural example using the developed user material is presented and its accuracy is verified.

scholarly journals Analytical Stress–Strain model for steel spirals-confined UHPC

2021 ◽  
Vol 5 ◽  
pp. 100130
Author(s):  
Negar Naeimi ◽  
Mohamed A. Moustafa
Keyword(s):  
Stress Strain ◽  
Strain Model
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