Experimental study of the stressed state of design elements in a large capacity grab

1971 ◽  
Vol 3 (10) ◽  
pp. 1238-1242
Author(s):  
B. S. Kasatkin ◽  
L. M. Lobanov ◽  
V. F. Musiyachenko ◽  
V. A. Pivtorak ◽  
G. I. Tkachuk
Keyword(s):  
Experimental Study ◽  
Stressed State ◽  
Large Capacity ◽  
Design Elements

Experimental study on the flexural behavior of steel tube slab composite beams and key parameters optimization

2019 ◽  
Vol 22 (11) ◽  
pp. 2476-2489 ◽  
Author(s):  
Pengjiao Jia ◽  
Wen Zhao ◽  
Yongping Guan ◽  
Jiachao Dong ◽  
Qinghe Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Composite Beams ◽  
Steel Tube ◽  
Design Guidelines ◽  
Reinforcement Ratio ◽  
Flexural Behavior ◽  
Flexural Capacity ◽  
Design Elements ◽  
Steel Bolts

This work presents an experimental study on the flexural behavior of steel tube slab composite beams subjected to pure bending. The main design elements considered in the work are the flange thickness, reinforcement ratio of high strength bolts, spacing between the tubes, and transverse patterns of the tube connections. Based on nine flexural experiments on simply supported steel tube slab specimens, the failure process and crack development in steel tube slab specimens, and their load–deflection curves are investigated. The results of the laboratory tests show that the welding of the bottom flange significantly improves the flexural capacity of the steel tube slab structure. In addition, a lower concrete’s compressive strength improves the ductility of the steel tube slab specimens. Moreover, the flexural capacities predicted from the design guidelines are in good agreement with the experimental test results. Finally, based on the numerical simulations using the ABAQUS software, a numerical model is established to further investigate the effect of the additional parameters on the flexural capacity of steel tube slab structures. The numerical results suggested that the diameter of the steel bolts and the reinforcement ratio have a limited effect on the flexural bearing capacity of the steel tube slab beams, and the ultimate bearing capacity increases linearly along with increase in the diameter of the steel bolts and the reinforcement ratio in a certain range.

Experimental study of stressed state of hollow cylinders

1972 ◽  
Vol 4 (10) ◽  
pp. 1221-1224
Author(s):  
I. P. Vlasenko ◽  
V. A. Potichenko
Keyword(s):  
Experimental Study ◽  
Stressed State ◽  
Hollow Cylinders

Experimental study of ultra-large capacity end-plate joints

2017 ◽  
Vol 128 ◽  
pp. 354-361 ◽  
Author(s):  
Gang Shi ◽  
Xuesen Chen ◽  
Dongyang Wang
Keyword(s):  
Experimental Study ◽  
Large Capacity ◽  
End Plate

scholarly journals Experimental Study on Arcing Effects to Contact Materials in 270V dc

2017 ◽  
Vol 4 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Q. C. Zhu ◽  
Z. B. Li ◽  
J. Wei ◽  
Z. X. Liu ◽  
J. Huang ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Voltage ◽  
Electrical Contact ◽  
Large Capacity ◽  
Contact Materials ◽  
Dc Voltage ◽  
Contact Erosion ◽  
Contact Life ◽  
Electromagnetic Relays

As supply DC voltage levels in automobiles, aviation and aerospace are becoming higher, high voltage and large capacity compact DC electromagnetic relays or contactors are becoming more important. In this paper, experiments were conducted at DC 270V/100 A in air and nitrogen, respectively, with CuCr40, CuCr45, CuCr50, CuW60, CuW70 and CuW90 as contact materials. Welding resistance (corresponding to electrical contact life), contact erosion and breaking arc durations were measured, and the obtained results were discussed.

Heat Transfer from Aluminum to He II—Application to Superconductive Magnetic Energy Storage

1979 ◽  
Vol 101 (2) ◽  
pp. 371-375 ◽  
Author(s):  
S. W. Van Sciver ◽  
R. W. Boom
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Flux ◽  
Energy Storage ◽  
Large Scale ◽  
Magnetic Energy ◽  
Maximum Heat ◽  
Design Elements ◽  
Design Values ◽  
Magnetic Energy Storage

Heat transfer problems associated with large scale Superconductive Magnetic Energy Storage (SMES) are unique due to the proposed size of a unit. The Wisconsin design consists of a cryogenically stable magnet cooled with He II at 1.8 K. The special properties of He II (T <2.17 K) provide an excellent heat transfer medium for magnet stability. Design values are determined from an experimental study of heat transfer from aluminum to He II. Under near saturated conditions we observe a maximum surface heat flux of 1.7 W/cm2 at 1.91 K and a recovery at 0.7 W/cm2. The advantages of operating the magnet under subcooled conditions are exemplified by improved heat transfer. The maximum at 1.89 K and 1.3 atm pressure is 2.3 W/cm2 with recovery enhanced to 1.9 W/cm2. A conservative maximum heat flux of 0.5 W/cm2 with an associated temperature difference of 0.5 K has been chosen for design. Elements of the experimental study as well as the design will be discussed.

scholarly journals The Effect of Gamified Teamwork on Business-related Idea Generation

2021 ◽  
Vol 3 (1) ◽  
pp. 21-29
Author(s):  
Polina Trusova
Keyword(s):  
Experimental Study ◽  
Competitive Advantage ◽  
Game Design ◽  
Idea Generation ◽  
Management Team ◽  
Conservation Of Resources ◽  
Design Elements ◽  
Related Idea ◽  
Innovative Enterprise ◽  
Positive Effect

Innovation providing a competitive advantage to enterprises is based on original ideas usually developed by teams. Therefore, the optimization of idea generation in teams is crucial for the enterprises’ competitiveness and survival. The goal of this experimental study is to test whether idea generation in team can be made more effective in terms of quantity and quality through gamification (the use of game design elements in non-game contexts). Based on conservation of resources theory, in the present study gamification was assumed to generate and regulate task-related resources and therefore to increase the number and originality of generated ideas. 170 students divided in 70 teams were asked to imagine themselves to be a management team of a young innovative enterprise during a crisis meeting and to generate solutions for the described problems. 35 teams were randomly assigned to the gamification condition and another 35 teams to the control condition. The number and originality of ideas were evaluated by two independent condition-blind raters and compared between the conditions. Gamification has a large positive effect on the idea number and a medium-sized positive effect on the idea originality. The findings, implications and limitations are discussed.

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