A Study on the Development of Floor-Fixed Standpipe Sway Brace for Narrow Space

This paper proposes a solution to the problems of constructing and installing sway braces for existing standpipes in narrow spaces and pits. The study develops a floor-fixed sway brace for a narrow space that can support the ground area under horizontal seismic loads (X-axis, Y-axis) as well as vertical seismic loads (Z-axis). The results of structural analysis using SolidWorks simulation showed that the eccentric load was generated in the first design according to the anchored position along the vertical direction, and the problem of exceeding the allowable stress of the material along the horizontal and vertical directions. In the second design model, deformation caused by the eccentric load along the vertical direction, similar to the first design model, did not occur. The maximum strain rate was 0.17%, which is approximately 12.84% less than the first design model (Maximum strain rate of 13.01%). It was confirmed that the structural stability and durability improved. Compressive and tensile load testing of the prototypes showed that all of them meet the performance criteria of the standard.

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Investigation on the enhanced maximum strain rate sensitivity (m) superplasticity of Mg-9Li-1Al alloy by a two-step deformation method

Materials Science and Engineering A ◽

10.1016/j.msea.2019.138219 ◽

2019 ◽

Vol 764 ◽

pp. 138219

Author(s):

H.P. Yang ◽

X. Zhang ◽

P. Chen ◽

M.W. Fu ◽

G.C. Wang ◽

...

Keyword(s):

Strain Rate ◽

Strain Rate Sensitivity ◽

Rate Sensitivity ◽

Maximum Strain ◽

Deformation Method

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Dynamic properties of stainless steel under direct tension loading using a simple gas gun

EPJ Web of Conferences ◽

10.1051/epjconf/201818302035 ◽

2018 ◽

Vol 183 ◽

pp. 02035 ◽

Cited By ~ 3

Author(s):

Anatoly Bragov ◽

Alexander Konstantinov ◽

Leopold Kruszka ◽

Andrey Lomunov ◽

Andrey Filippov

Keyword(s):

Stainless Steel ◽

Strain Rate ◽

High Speed ◽

Split Hopkinson Pressure Bar ◽

Dynamic Properties ◽

Tensile Load ◽

Hopkinson Pressure Bar ◽

Direct Tension ◽

Stress Strain ◽

Gas Gun

The combined experimental and theoretical approach was applied to the study of high-speed deformation and fracture of the 1810 stainless steel. The material tests were performed using a split Hopkinson pressure bar to determine dynamic stress-strain curves, strain rate histories, plastic properties and fracture in the strain rate range of 102 ÷ 104 s-1. A scheme has been realized for obtaining a direct tensile load in the SHPB, using a tubular striker and a gas gun of a simple design. The parameters of the Johnson-Cook material model were identified using the experimental results obtained. Using a series of verification experiments under various types of stress-strain state, the degree of reliability of the identified mathematical model of the behavior of the material studied was determined.

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Superplastic Behavior of B- and Gd-Containing β-Solidifying TiAl Based Alloy

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.385.131 ◽

2018 ◽

Vol 385 ◽

pp. 131-136

Author(s):

Vitaliy Sokolovsky ◽

Nikita Stepanov ◽

Sergey Zherebtsov ◽

Nadezhda Nochovnaya ◽

Pavel Panin ◽

...

Keyword(s):

Strain Rate ◽

Mechanical Behavior ◽

Strain Rate Sensitivity ◽

Phase Field ◽

Rate Sensitivity ◽

Maximum Strain ◽

Superplastic Behavior ◽

Β Phase ◽

Refined Microstructure ◽

Phase Fields

Mechanical behavior and microstructure evolution of the cast Ti-43.2Al-1.9V-1.1Nb-1.0Zr-0.2Gd-0.2B alloy were studied at temperatures from 1100 to 1250°С and strain rates in the range 0.001-1 s-1. Following phase fields (α2+γ), (α+γ), (α) and (α+β) during heating of alloy were revealed. Microstructure analysis after deformation and mechanical behavior allowed defining main processes of structure formation. Two temperature-strain rate conditions with pronounced superplastic behaviour were found: the first one corresponded to the (α2+γ)-phase field (1100°C), where the microstructure had mainly a lamellar morphology, and the second was associated with the (α+β)-phase field (1250°C), in which the α-phase dominated. At T=1100°C and έ=0.05 s-1the maximum strain rate sensitivitymwas of 0.40. At T=1250°C and έ=0.5 s-1the maximum strain rate sensitivitymwas of 0.59. In the (α2+γ)-phase field, superplastic behavior was associated with the transformation of the lamellar structure into globular one. In the (α+β)-phase field, it was due to the formation of a homogeneous refined microstructure during dynamic recrystallization. The relationship between coefficient m value and microstructure formed was discussed.

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OS0508 Study on Cyclic Stress and Strain Response of Carbon Black-Filled SBR Vulcanizates : Effects of Maximum Strain, Strain Range, Strain Rate and CB Content on the Response

The Proceedings of the Materials and Mechanics Conference ◽

10.1299/jsmemm.2013._os0508-1_ ◽

2013 ◽

Vol 2013 (0) ◽

pp. _OS0508-1_-_OS0508-3_

Author(s):

Junichiro YAMABE ◽

Masaki FUJIKAWA ◽

Yuji KODAMA ◽

Masataka KOISHI

Keyword(s):

Carbon Black ◽

Strain Rate ◽

Strain Range ◽

Cyclic Stress ◽

Stress And Strain ◽

Strain Response ◽

Maximum Strain

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The effects of load misalignment on tensile load testing of direct bonded orthodontic brackets—a finite element model

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1016/s0889-5406(94)70138-5 ◽

1994 ◽

Vol 105 (6) ◽

pp. 543-551 ◽

Cited By ~ 20

Author(s):

Thomas R. Katona ◽

B. Keith Moore

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Tensile Load ◽

Element Model ◽

Orthodontic Brackets ◽

Load Testing

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Superplastic Behaviour of AZ61-F Magnesium Composite Materials

High Temperature Materials and Processes ◽

10.1515/htmp-2016-0026 ◽

2017 ◽

Vol 36 (3) ◽

pp. 279-283 ◽

Cited By ~ 1

Author(s):

Michal Besterci ◽

Katarína Sülleiová ◽

Oksana Velgosová ◽

Beáta Balloková ◽

S.-J. Huang

Keyword(s):

Grain Size ◽

Composite Materials ◽

Strain Rate ◽

Magnesium Alloys ◽

Equal Channel Angular Pressing ◽

Strain Rates ◽

Maximum Strain ◽

Plastic Deformations ◽

Angular Pressing ◽

Different Temperatures

AbstractDeformation of AZ61-F magnesium alloys with 1 wt % of Al2O3phase was tested at different temperatures and different strain rates. It was shown that at temperatures 473–523 K and the highest strain rate applied from 1×10–2s–1to 1×10–4s–1, a significant ductility growth was observed. The grain size of 0.6–0.8 μm was reached by severe plastic deformations by means of equal channel angular pressing (ECAP). Secondary Mg17Al12and Al2O3phases were identified. Maximum strain was gained at temperature of 473 K and strain rate of 1×10–4s–1.

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Investigation on the maximum strain rate sensitivity ( m ) superplastic deformation of Mg-Li based alloy

Materials & Design ◽

10.1016/j.matdes.2016.09.066 ◽

2016 ◽

Vol 112 ◽

pp. 151-159 ◽

Cited By ~ 18

Author(s):

H.P. Yang ◽

M.W. Fu ◽

S. To ◽

G.C. Wang

Keyword(s):

Strain Rate ◽

Strain Rate Sensitivity ◽

Superplastic Deformation ◽

Rate Sensitivity ◽

Maximum Strain

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A Simplified Method to Account for Plastic Rate Sensitivity With Large Deformations

Journal of Applied Mechanics ◽

10.1115/1.3424659 ◽

1979 ◽

Vol 46 (4) ◽

pp. 811-816 ◽

Cited By ~ 23

Author(s):

N. Perrone ◽

P. Bhadra

Keyword(s):

Strain Rate ◽

Large Deformations ◽

Three Dimensional ◽

Rate Sensitivity ◽

Approximate Solutions ◽

Dimensional Structure ◽

Initial Kinetic Energy ◽

Maximum Strain ◽

Membrane Action ◽

Deformation State

A string supported impulsively loaded mass is used to study large deformation rate sensitivity effects where membrane action is dominant. It is found that an overall correction factor can be devised using physical properties associated with the average strain rate. Maximum strain rate occurs with a velocity field corresponding to the deformation state wherein half the initial kinetic energy has been dissipated. (If V0 is initial velocity, V0/2 is associated with maximum strain rate.) Exact and approximate solutions for a broad range of parameters serve to illustrate and verify the procedure. A discussion is presented to show how the same methodology could also be applied via a modal approach to an arbitrary three-dimensional structure undergoing large deformations, if the primary mechanism for energy absorption is from membrane action.

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The effect of grain size on the maximum strain rate sensitivity observed in superplastic alloys

Scripta Metallurgica ◽

10.1016/0036-9748(79)90118-2 ◽

1979 ◽

Vol 13 (7) ◽

pp. 605-610 ◽

Cited By ~ 1

Author(s):

R.H. Bricknell

Keyword(s):

Grain Size ◽

Strain Rate ◽

Strain Rate Sensitivity ◽

Rate Sensitivity ◽

Maximum Strain

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INFLUENCE OF TEMPERATURE AND STRAIN RATE ON SUPERPLASTICITY KINETICS OF COMPOSITE AZ61-F MAGNESIUM MATERIALS

Acta Metallurgica Slovaca ◽

10.12776/ams.v24i3.1153 ◽

2018 ◽

Vol 24 (3) ◽

pp. 200

Author(s):

Michal Besterci ◽

Song-Jeng Huang ◽

Katarína Sülleiová ◽

Beáta Ballóková

Keyword(s):

Plastic Deformation ◽

Strain Rate ◽

Superplastic Deformation ◽

Strain Rates ◽

Maximum Strain ◽

Influence Of Temperature ◽

Angular Pressing ◽

Micromechanisms Of Fracture ◽

The Mean ◽

Kinetics Of

Micromechanisms of fracture of AZ61-F composites in the zone of quasi-superplastic deformation were analyzed and quantified in this work. Deformation of AZ61-F magnesium alloys with 1 wt.% of Al2O3 phase was tested at a temperature of 473 K and different strain rates. It was shown that at the temperature of 473 K and the highest strain rate applied from 1× 10−2 to 1 × 10−4 s−1, a significant growth of ductility was observed. The mean dimples diameter of the ductile fracture decreased with the decreasing strain rate. The grain size of 0.7 μm was reached by severe plastic deformation using equal channel angular pressing (ECAP). Secondary Mg17Al12 and Al2O3 phases were identified. The maximum strain was reached at the temperature of 473 K and strain rate of 1 × 10−4 s−1.

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