scholarly journals Proposal of sheet buckling design criteria for high strength steel under impact crushing

2012 ◽  
Author(s):  
K. Watanabe ◽  
K. Natori ◽  
H. Enjoji ◽  
T. Tanaka ◽  
Y. Imaida
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Design Criteria ◽  
Impact Crushing

Structural Performance Evaluation of Built-Up Stub Steel Column with Various Steel Grades under Concentric Loading

2015 ◽  
Vol 764-765 ◽  
pp. 127-131
Author(s):  
Yang Yang ◽  
Kang Min Lee ◽  
Keun Yeong Oh ◽  
Sung Bin Hong
Keyword(s):  
Tensile Strength ◽  
High Strength Steel ◽  
Local Stability ◽  
Experimental Studies ◽  
High Strength Steels ◽  
High Strength ◽  
Design Criteria ◽  
Stability Criteria ◽  
Steel Grades ◽  
Concentric Loading

The current local stability criteria (KBC2009, AISC2010) are enacted through theoretical and experimental studies of ordinary steels, but the mechanical properties of high strength steels are different from ordinary steels. The high strength steel in the applicability of design criteria should be needed to review because of increasing market demanding for high strength steel in the high-rise and long span buildings. In this study, stub columns of H-shaped and box section with various steel grades subjected to concentric loading were investigated, and these steels were checked to the applicability of current local stability criteria. The difference between the ordinary steel and high strength steel was compared. As a result of comparison with various steel grades, most specimens were satisfied with the design criteria, but some specimens with lower tensile strength were not reached the required strength. It is considered that the uncertainty of material was the higher when the tensile strength of material was the lower.

Design criteria for exposed hydro penstocks

1978 ◽  
Vol 5 (3) ◽  
pp. 340-351 ◽  
Author(s):  
J. L. Gordon
Keyword(s):  
Quality Control ◽  
Pressure Vessel ◽  
High Strength Steel ◽  
High Strength ◽  
Design Criteria ◽  
Similar Work ◽  
Wide Range ◽  
Different Types ◽  
Control Procedures ◽  
American Society

At present there are no national codes for the design of exposed hydro-electric penstocks. Thus an engineer must either make reference to other national codes for similar work, such as the American Society of Mechanical Engineers boiler and pressure vessel code or the American Water Works Association Standard for steel water piping, or he must write his own code and is then faced with the decision of having to select design criteria that must cover a wide range of steels; different operating and waterhammer conditions; a wide range of quality control procedures used in manufacture and erection of the penstock; and different types of penstocks, isostatic where the stresses can be calculated with precision, and hyperstatic where the stress calculation is more imprecise. This paper discusses design criteria, factors of safety, and corresponding quality control procedures that can be used for either isostatic or hyperstatic penstocks using mild, intermediate, or high strength steel for penstocks supplying reaction of impulse turbines.

Study on Impact Crushing Properties of High Strength Steel Sheets

2011 ◽  
Vol 473 ◽  
pp. 376-381 ◽  
Author(s):  
Keiko Natori ◽  
Kenichi Watanabe ◽  
Tatsuya Tanaka ◽  
Yutaka Imaida
Keyword(s):  
High Strength Steel ◽  
High Speed ◽  
High Strength ◽  
Elastic Buckling ◽  
Effective Width ◽  
Steel Sheets ◽  
Impact Crushing ◽  
Deformation Strain Rate ◽  
High Possibility ◽  
Impact Absorption

The purpose of this study is to verify the validity of sheet buckling design based on the effective width theory investigation of impact crushing properties in high strength steel sheets. We clarify the need to make full sections effectively without elastic buckling occurring and consider the application of the effective width theory under high speed deformation. We report our findings of our investigation into the sheet buckling phenomenon with numerical simulation by varying deformation strain rate, mechanical property of material and member configuration. The results demonstrate that, with increasing crush speed, the cross section of a steel sheet become effective, while there is a high possibility of the buckling phenomenon that does not function as efficient impact absorption and is not evaluated with the existing theory.

An Experimental Evaluation of Structural Performance for High Strength Steel Stub Columns under Eccentric Loads

2015 ◽  
Vol 764-765 ◽  
pp. 111-115
Author(s):  
Sung Bin Hong ◽  
Kang Min Lee ◽  
Keun Yeong Oh ◽  
Yang Yang
Keyword(s):  
Experimental Evaluation ◽  
High Strength Steel ◽  
Axial Load ◽  
High Strength ◽  
Experimental Tests ◽  
Structural Performance ◽  
Design Criteria ◽  
Evaluation Test ◽  
Stub Columns ◽  
Eccentric Distance

The researches on strength of members bending-compression were evaluated through experimental tests on eccentrically load of high-strength steel (HSA800). This test was performed on H-shaped steels of high strength steel (HSA800) to verify the P-M correlations of members subjected to combined forces according to axial load ratios. And this strength evaluation test was performed for various P-M combinations on adjusted eccentric distance. The results showed that all the specimens was satisfied with P-M correlations according to design criteria.

COMPARATIVE CHARACTERISTICS OF PHYSICAL AND MECHANICAL PROPERTIES OF COMPOSITE MATERIALS AND HIGH-STRENGTH STEEL 30FGSN2A

2020 ◽  
Author(s):  
I.R. Antypes ◽  
◽  
V.V. Zaitsev ◽  
Keyword(s):  
Composite Materials ◽  
High Strength Steel ◽  
Critical Stress ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Aviation Industry ◽  
Specific Strength ◽  
Aircraft Landing ◽  
Carbon Plastics ◽  
Aircraft Landing Gear

Currently, the use of composite materials is increasingly used in various areas of the national economy, including the aviation industry. The materials of this article are devoted to the study of the use of composite materials for the manufacture of aircraft landing gear in comparison with the traditionally used brand of steel. As a result of the work carried out, it was found that the slope made of carbon fiber showed a critical stress twice as high as its design made of 30xgsn2a steel. In addition, carbon plastics are superior to high-strength steel in terms of specific strength, stiffness, and tensile strength.

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