scholarly journals STUDY ON ENERGY ABSORBING PERFORMANCE OF SEISMIC CONTROL PANEL-DAMPERS USING LOW-YIELD-POINT STEEL UNDER STATIC LOADING

1998 ◽  
Vol 63 (509) ◽  
pp. 159-166 ◽  
Author(s):  
Kiyoshi TANAKA ◽  
Yasuhito SASAKI
Keyword(s):  
Yield Point ◽  
Static Loading ◽  
Control Panel ◽  
Seismic Control ◽  
Energy Absorbing

scholarly journals STUDY ON PRACTICAL APPLICATION OF DAMAGE TOLERANT STRUCTURES WITH SEISMIC CONTROL PANEL USING LOW-YIELD-POINT STEEL TO A HIGH-RISE STEEL BUILDING

1997 ◽  
Vol 3 (5) ◽  
pp. 126-131 ◽  
Author(s):  
Kiyoshi TANAKA ◽  
Tsugio TORII ◽  
Yasuhito SASAKI ◽  
Hiroki KAWAI ◽  
Mamoru IWATA ◽  
...  
Keyword(s):  
Yield Point ◽  
Control Panel ◽  
Practical Application ◽  
Seismic Control ◽  
High Rise ◽  
Steel Building ◽  
Damage Tolerant

scholarly journals Preliminary tests on an energy absorbing element for braced structures under earthquake loading

1983 ◽  
Vol 16 (3) ◽  
pp. 201-212 ◽  
Author(s):  
R. G. Tyler
Keyword(s):  
Static Loading ◽  
Stable Condition ◽  
Earthquake Loading ◽  
Loading Conditions ◽  
Energy Absorbing

While quite slender cross bracing may suffice to maintain rigidity in a braced structure under static loading conditions, during an earthquake progressive slackness develops in the bracings, resulting from overstrain in tension, which gives rise to increasing horizontal movements and degradation. In this paper tests are described on devices, fabricated from round bars and located at the centre of the bracings, which allow repetitive overstrain to occur without the development of slack. It is postulated that, for a stable condition of cyclic overstrain, the device shall be of the same shape as the frame to be braced, and most usually fabricated in steel rod or bar. Successful tests were carried out on such a device in a square frame.

Microstructural and fractographic characterization of B4C-Al cermets tested under dynamic and static loading

1989 ◽  
Vol 47 ◽  
pp. 562-563
Author(s):  
Gyeung Ho Kim ◽  
Mehmet Sarikaya ◽  
D. L. Milius ◽  
I. A. Aksay
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Static Loading ◽  
Carbon Deposition ◽  
Full Density ◽  
Unique Combination ◽  
Strong Component ◽  
Reaction Products

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.

CREDO RADON UA – INFORMATION MODEL FOR CALCULATION OF ROAD CONSTRACTION

2019 ◽  
pp. 34-42
Author(s):  
Volodymyr Karedin ◽  
Nadiya Pavlenko
Keyword(s):  
Design Process ◽  
Static Loading ◽  
Computer Aided Design ◽  
Experimental Studies ◽  
Construction Materials ◽  
Residual Deformation ◽  
Road Construction ◽  
Information Support ◽  
Existing Structures ◽  
Road Pavement

CREDO RADON UA software provides an automated calculation of the strength of the pavement structures of non-rigid and rigid types, as well as the calculation of the strengthening of existing structures. In the article, one can see the main features and functionality of the CREDO RADON UA software, the main points in the calculations according to the new regulations. Information support of the design process includes necessary databases, informational and helping materials that make up the full support of the pavement design process. The concept of CREDO RADON UA 1.0 software is made on the use of elasticity theory methods in calculations of initial information models of pavements. Performing optimization calculations, the roadwear in CREDO RADON UA is designed in such a way that no unacceptable residual deformation occurs under the influence of short-term dynamic or static loading in the working layer of the earth bed and in the structural layers during the lifetime of the structure. The calculation algorithms were made in accordance with the current regulatory documents of Ukraine. CREDO RADON UA software allows user to create information bases on road construction materials and vehicles as part of the traffic flow for calculations. The presented system of automated modeling makes it easier for the customer to control the quality of design solutions, to reasonably assign designs to layers of reinforcement, to quickly make comparisons of calculations of different designs for the optimal use of allocated funds. Prospects for further improvement of the program should be the results of theoretical and experimental studies on filling the databases, which are used as information support for automated design of road structures. Keywords: CREDO RADON UA, road, computer-aided design, repair project, road pavement, strengthening, construction, rigid pavement, elasticity module, a transport stream, calculation method, information support, dynamic or static loading.

Energy Absorbing Characteristics of GF/Nylon Tubes

1998 ◽  
Vol 47 (5) ◽  
pp. 458-463
Author(s):  
Hiroyuki KAWADA ◽  
Takeshi HONDA ◽  
Maiko TAKASHIMA ◽  
Hajime SATOH
Keyword(s):  
Energy Absorbing

Behavior of composite shells under transverse impact and quasi-static loading

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 1065-1073
Author(s):  
Brian L. Wardle ◽  
Paul A. Lagace
Keyword(s):  
Static Loading ◽  
Composite Shells ◽  
Transverse Impact

Study of the character and causes of destruction of the cardan shaft of the propeller engine

2019 ◽  
Vol 85 (12) ◽  
pp. 43-50
Author(s):  
D. A. Movenko ◽  
L. V. Morozova ◽  
S. V. Shurtakov
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Yield Point ◽  
Protective Coating ◽  
Fracture Pattern ◽  
Corrosion Cracking ◽  
Tempered Martensite ◽  
Neck Formation ◽  
Static Mechanism ◽  
Shaft Surface

The results of studying operational destruction of a high-loaded cardan shaft of the propeller engine made of steel 38KhN3MFA are presented to elucidate the cause of damage and develop a set of recommendations and measures aimed at elimination of adverse factors. Methods of scanning electron and optical microscopy, as well as X-ray spectral microanalysis are used to determine the mechanical properties, chemical composition, microstructure, and fracture pattern of cardan shaft fragments. It is shown that the mechanical properties and chemical composition of the material correspond to the requirements of the regulatory documentation, defects of metallurgical origin both in the shaft metal and in the fractures are absent. The microstructure of the studied shaft fragments is tempered martensite. Fractographic analysis revealed that the destruction of cardan shaft occurred by a static mechanism. The fracture surface is coated with corrosion products. The revealed cracks developed by the mechanism of corrosion cracking due to violation of the protective coating on the shaft. The results of the study showed that the destruction of the cardan shaft of a propeller engine made of steel 38Kh3MFA occurred due to formation and development of spiral cracks by the mechanism of stress corrosion cracking under loads below the yield point of steel. The reason for «neck» formation upon destruction of the shaft fragment is attributed to the yield point of steel attained during operation. Regular preventive inspections are recommended to assess the safety of the protective coating on the shaft surface to exclude formation and development of corrosion cracks.

REPUBLIC 65

Alloy Digest ◽  
1960 ◽  
Vol 9 (5) ◽  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Tensile Properties ◽  
Yield Point ◽  
Precipitation Hardening ◽  
Heat Treating ◽  
Low Alloy Steel ◽  
Rolled Condition ◽  
Hardening Heat Treatment ◽  
Minimum Yield

Abstract REPUBLIC-65 is a precipitation hardenable low alloy steel which will meet 65000 psi minimum yield point in the as-rolled condition followed by a precipitation hardening heat treatment. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-98. Producer or source: Republic Steel Corporation.

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