DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Derivative criteria of plasticity anddurability of metal materials

Vestnik MGSU 9/2014
  • 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 .
  • Gustov Dmitriy Yur’evich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Building and Hoisting Machinery, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 183-53-83; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Voronina Irina Vladimirovna - Moscow State University of Civil Engineering (MGSU) Senior Lecturer, Department of Building and Hoisting Machinery, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 182-16-87; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 39-47

Criteria of plasticity and durability derivative of standard indicators of plasticity (δ, ψ) and durability (σ
0,2, σ
B) are offered. Criteria К
δψ and К
s follow from the equation of relative indicators of durability and plasticity. The purpose of the researches is the establishment of interrelation of derivative criteria with the Page indicator. The values of derivative criteria were defined for steels 50X and 50XH after processing by cold, and also for steels 50G2 and 38HGN after sorbitizing. It was established that the sum of the offered derivative criteria of plasticity and durability С
к considered for the steels is almost equal to unit and corresponds to a square root of relative durability and plasticity criterion C
0,5. Both criteria testify to two-unity opposite processes of deformation and resistance to deformation. By means of the equations for S
к and С it is possible to calculate an indicator of uniform plastic deformation of σ
р and through it to estimate synergetic criteria - true tension and specific energy of deformation and destruction of metal materials. On the basis of the received results the expressions for assessing the uniform and concentrated components of plastic deformation are established. The preference of the dependence of uniform relative lengthening from a cubic root of criterion К
δψ, and also to work of the criteria of relative lengthening and relative durability is given. The advantage of the formulas consists in simplicity and efficiency of calculation, in ensuring necessary accuracy of calculation of the size δ
р for the subsequent calculation of structural and power (synergetic) criteria of reliability of metals.

DOI: 10.22227/1997-0935.2014.9.39-47

References
  1. Gustov Yu.I., Allattuf Kh. Issledovanie vzaimosvyazi koeffitsientov plastichnosti i predela tekuchesti staley standartnykh kategoriy prochnosti [Study of Interdependence between Ductility Factors and Yield Limits for Steels of Standard Strength Grades]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 7, pp. 22—26.
  2. Gustov Yu.I., Gustov D.Yu. K razvitiyu nauchnykh osnov stroitel’nogo metallovedeniya [To Development of Scientific Fundamentals of Construction Metallurgical Science]. Doklady X rossiysko-pol’skogo seminara «Teoreticheskie osnovy stroitel’stva». Varshava [Reports of the 10th Russian-Polish Seminar "Theoretical Foundations of Construction"]. Warsaw, Moscow, ASV Publ., 2001, pp. 307—314.
  3. Ivanova V.S., Balankin A.S., Bunin I.Zh., Oksogoev A.A. Sinergetika i fraktaly v materialovedenii [Synergetrics and Fractals in Materials Science]. Moscow, Nauka Publ., 1994, 383 p.
  4. Skudnov V.A. Novye kompleksy razrusheniya sinergetiki dlya otsenki sostoyaniya splavov [New Synergetrics Collapse Complexes for an Assessment of Alloys Condition]. Metalovedenie i metallurgiya. Trudy NGTU imeni R.E. Alekseeva [Metal Science and Metallurgy. Works of Nizhny Novgorod State Technical University n.a. R.E. Alekseev]. N. Novgorod, 2003, vol. 38, pp. 155—159.
  5. Gustov Yu.I., Gustov D.Yu., Voronina I.V. Sinergeticheskie kriterii metallicheskikh materialov [Synergetic Criteria of Metal Materials]. Sbornik dokladov XV Rossiysko-slovatsko-pol’skogo seminara «Teoreticheskie osnovy stroitel›stva». Varshava [Reports of the 15th Russian-Polish Seminar "Theoretical Foundations of Construction"]. Warsaw, Moscow, MGSU Publ., 2006, pp. 179—184.
  6. Il’in L.N. Osnovy ucheniya o plasticheskoy deformatsii [Doctrine Bases on Plastic Deformation]. Moscow, Mashinostroenie Publ.,1980, 150 p.
  7. Fridman Ya.B. Mekhanicheskie svoystva metallov. Ch. 2 Mekhanicheskie ispytaniya. Konstruktsionnaya prochnost’ [Mechanical Properties of Metals. Part 2. Mechanical Tests. Constructional Strength]. Moscow, Mashinostroenie Publ., 1974, 368 p.
  8. Goritskiy V.M., Terent’ev V.F. Struktura i ustalostnoe razrushenie metallov [Structure and Fatigue Failure of Metals]. Moscow, Metallurgiya Publ., 1980, 208 p.
  9. Arzamasov B.N., Solov’eva T.V., Gerasimov S.A., Mukhin G.G., Khovava O.M. Spravochnik po konstruktsionnym materialam [Reference Book on Construction Materials]. Moscow, Izd-vo MGTU im. N.E. Baumana Publ., 2005, 640 p.
  10. Larsen B. Formality of Sheet Metal. Sheck Metal Ind. 1977, vol. 54, no. 10, pp. 971—977.
  11. Abramov V.V., Djagouri L.V., Rakunov Yu.P. Kinetics and Mechanism of Contact Interaction with the Deformation and Thermal Deformation Effects on Crystalline Inorganic Materials. Materials of the 1st International Scientific Conference "Global Science and Innovation" (Chicago, USA, December 17—18th, 2013). Chicago, USA, 2013, vol. 2, pp. 360—371.
  12. Abramov V.V., Djagouri L.V., Rakunov Yu.P. Growth Kinetics of Strength (Setting) between Dissimilar Crystalline Materials with Dramatically Different Resistances to Plastic Deformation and Natures of Chemical Bonds. Materials of the 1st International Scientific Ñonference «Global Science and Innovation» (Chicago, USA, December 17—18th, 2013). Chicago, USA, 2013, vol. 2, pp. 372—380.
  13. Callister W.D., Rethwisch D.G. Fundamentals of Materials Science and Engineering. An Integrated Approach. John Wiley Sons, Ins., 2008, 896 p.
  14. Sansalone M., Jaeger B. Applications of the Impact-Echo Method for Detecting Flaws in Highway Bridges. Structural Materials Technology. An NTD Conference, San Diego, California, 1996, pp. 204—210.
  15. Tylkin M.A. Prochnost’ i iznosostoykost’ detaley metallurgicheskogo oborudovaniya [Strength and Wear Resistance of Details of the Metallurgical Equipment]. Moscow, Metallurgiya Publ., 1965, 347 p.

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RESEARCH OF SYNERGETIC RELIABILITY OF PEARLITE-REDUCED STRUCTURAL STEEL 09G2FB

Vestnik MGSU 7/2012
  • Gustov Yuriy Ivanovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Profes- sor, Department of Machinery, Machine Elements and Process Metallurgy; +7 (499) 183-94-95, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Rus- sian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Voronina Irina Vladimirovna - Moscow State University of Civil Engineering (MGSU) Senior Lecturer, Department of Building and Hoisting Machinery, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 182-16-87; 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 159 - 162

The primary objective of the research is the synergetic reliability of perlite-reduced structural steel 09G2FB exposed to various thermal and mechanical treatments. In the aftermath of the above exposure, the steel in question has proved to assume a set of strength-related and plastic mechanical properties (σσδ and ψ).
On the basis of the above, an equation is formed\[{{{\sigma }_{\Tau }}}/{{{\sigma }_{\Beta }}+{\delta }/{\Psi }\;=}\;={{\left[ {\left( 1+{{\delta }_{}} \right)}/{\left( 1+{{\delta }_{\Rho }} \right)}\; \right]}^{{1}/{\Psi }\;}},\] and its solution in respect of the uniform component ${{\delta }_{\text{P}}}$ is used to generate the expression \[{{\delta }_{\Rho }}={{\left[ {\left( 1+\delta \right)}/{{{}^{\Psi }}}\; \right]}^{0,5}}-1\]and, hence \[{{\Psi }_{\Rho }}={{{\delta }_{\Rho }}}/{\left( 1+{{\delta }_{\Rho }} \right)}\;.\] To use the synergy criteria, the following expression is applied: \[{{S}_{\Beta }}={{{\sigma }_{\Beta }}}/{\left( 1-{{\Psi }_{\Rho }} \right)}\;,{{S}_{\operatorname{K}}}={{\sigma }_{\Beta }}\left[ {1+\Psi }/{\left( 1-{{\Psi }_{\Rho }} \right)}\; \right],\] as well as the following expression of specific uniform and a specific limit energy :
\[{{W}_{\Rho }}=0,5\left( {{\sigma }_{\Tau }}+{{S}_{B}} \right)\ln \left[ {1}/{\left( 1-{{\Psi }_{\Rho }} \right)}\; \right],{{W}_{C}}=0,5\left( {{\sigma }_{\Tau }}+{{S}_{K}} \right)\ln \left[ {1}/{\left( 1-\Psi \right)}\; \right].\]
\[{{K}_{}}={{{W}_{C}}}/{{{S}_{T}}}\;,G={{{W}_{}}}/{{{W}_{C}},}\;{{K}_{a}}={{{W}_{C}}}/{{{A}_{C}}}\;,\]where static viscosity is calculated according to:\[{{}_{}}=0,5\left( {{S}_{\operatorname{K}}}-{{\sigma }_{\Tau }} \right)\ln \left[ {1}/{\left( 1-\Psi \right)}\; \right].\]
The secondary objective of the project is the identification of the steel brittleness threshold to assure controlled rolling and application of the above steel in construction.

DOI: 10.22227/1997-0935.2012.7.159 - 162

References
  1. Bol’shakov V.I. Substrukturnoe uprochnenie konstruktsionnykh staley [Substructural Strengthening of Structural Steels], a monograph. Canada, 1998, 316 p.
  2. Gustov Yu.I., Gustov D.Yu., Voronina I.V. Sinergeticheskie kriterii metallicheskikh materialov [Synergetic Criteria of Metal Materials]. Collected works of the 15th Russian-Slovak-Polish Seminar. Theoretical Fundamentals of Civil Engineering. Warsaw, 2006, pp. 179—184.
  3. Mozberg R.K. Materialovedenie [Material Engineering]. Valgus Publ., Tallinn, 1976, p. 554.

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