DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

ONE-PARAMETRIC DETERMINATIONOF UNIFORM PLASTIC STRAIN FOR STANDARD STEELS

Vestnik MGSU 6/2013
  • Gustov Yuriy Ivanovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Machinery, Machine Elements and Process Metallurgy, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 183-94-95; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Allattouf Hassan Lattouf - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Mechanic Equip- ment, Details of Machines and Technology of Metals, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 57-62

One-parametric dependence of the uniform elongation on the total elongation is tested on the basis of preliminary studies. It makes it possible to assess static and cyclic parameters of steel forgings with the thickness values up to 500—800 mm, although no time-consuming and labour-intensive experiments are needed.The total elongation consists of uniform and concentrative components. The uniform elongation corresponds to the maximum loading value attained in the process of static tension testing. The special feature and the advantage of this feature is its independence from the shape of samples exposed to testing procedures. This feature is employed to determine the per-unit performance of plastic strain of steel in terms of brittle failure and fatigue resistance of metals. The uniform elongation correlates with the elasticity used to evaluate the cold brittleness of metal materials. Thus, the assessment of the uniform plastic deformation is needed to make an educated choice of materials and analyze the conditions of processing industrial and structural steels.

DOI: 10.22227/1997-0935.2013.6.57-62

References
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STUDY OF INTERRELATIONBETWEEN PLASTICITY AND ELASTICITY OF METALS

Vestnik MGSU 8/2013
  • Gustov Yuriy Ivanovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Machinery, Machine Elements and Process Metallurgy, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 183-94-95; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Allattouf Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Machinery, Machine Elements and Process Metallurgy, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shоsse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 14-20

The operational capacity of metal materials as part of structural elements of industrial and civil buildings depends on plastic deformability of metals. This property of construction steels is assessed through the employment of the overall elongation coefficient consisting of uniform and concentrated components.For metal structural elements, assessment of steel plasticity using the uniform elongation method (rather than overall elongation) is preferable. This component characterizes the tendency of steels to brittle destruction, fatigue resistance and cold brittleness.Therefore, the study of interrelation between plasticity and elasticity of steels is very important. Dependences of impact elasticity and failure elasticity on their uniform elongation are studied. The values of impact elasticity and failure elasticity are obtained experimentally in the process of testing of the 40ХЛ grade steel hardened at the temperature of 860 °C and tempered at the temperature of 200 °C.The elongation factor is calculated using the formula of uniform elongation. For steels under consideration, formulas of impact elasticity and failure elasticity are obtained, where uniform elongation is expressed as a fraction.

DOI: 10.22227/1997-0935.2013.8.14-20

References
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