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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
  1. Gustov Yu.I., Gustov D.Yu., Bol’shakov V.I. Prochnostno-plasticheskaya indeksatsiya metallicheskikh materialov [Strength and Plasticity Indexing of Metal Materials]. Metallurgiya i gornorudnaya promyshlennost’ [Metallurgy and Mining Industry]. 1996, no. 3-4, pp. 31—33.
  2. Balandin V.A., Potapov V.N., Yakovleva V.S. Otsenivat’ rabotosposobnost’ konstruktsiy po ravnomernomu otnositel’nomu udlineniyu staley [Assessment of Performance of Structures on the Basis of Uniform Relative Elongation of Steels]. Promyshlennoe stroitel’stvo [Industrial Engineering]. 1976, no. 11, pp.37—38.
  3. Matt K. Zeitschrift f?r Metallkunde. 1962. Bd. 53, H4.
  4. Borisova S.A. Vliyanie termotsiklicheskoy obrabotki na rabotosposobnost’ desyati konstruktsionnykh staley [Influence of Thermal-cycle Treatment on Performance of Ten Grades of Structural Steel]. Materialovedenie i metallurgiya [Material Science and Metallurgy]. Trudy NGTU [Works of Nizhegorodsky State University of Technology]. Nizhny Novgorod, NGTU Publ., 2004, vol. 42, pp. 220—224.
  5. Skudnov V.A., Lovkov A.V. Vzaimosvyaz’ predela ustalosti s kriteriyami razrusheniya sinergetiki staley [Interrelation between Fatigue Point and Criteria for Destruction of Steel Synergetics]. Materialovedenie i metallurgiya [Material Science and Metallurgy]. Trudy NGTU [Works of Nizhegorodsky State University of Technology]. Nizhny Novgorod, NGTU Publ., 2004, vol. 42, pp. 119—123.
  6. Gustov Yu.I., Allattuf H. Sinergeticheskie kriterii staley standartnykh kategoriy prochnosti [Synergetic Criteria of Steels Having Standard Grades of Strength]. Mekhanizatsiya stroitel’stva [Mechanization of Construction Operations]. 2013, no.2, pp. 24—27.
  7. Korobko V.I. Zolotaya proportsiya i problemy garmonii sistem [Golden Proportion and Problems of Harmony of Systems]. Izdatel’stvo ASV Stran SNG Publ., 373 p.
  8. Ivanova V.S., Balankin A.S., Bunin I.Zh., Oksogoev A.A. Sinergetika i fraktaly v materialovedenii [Synergy and Fractals in Material Science]. Moscow, Nauka Publ., 1994, 383 p.
  9. Skudnov V.A. Zakonomernosti predel’noy udel’noy energii deformatsii – osnovnoy sinergeticheskoy (kooperativnoy) kharakteristiki razrusheniya i rabotosposobnosti metallov [Regularities of Limit Per-unit Energy of Deformation as the Principal Synergetic (Cooperative) Destruction and Performance-related Characteristic of Metals]. Trudy NGTU. Materialovedenie i metallurgiya. [Works of Nizhegorodsky State University of Technology. Material Science and Metallurgy]. Nizhny Novgorod, 2004, vol. 94, 101 p.
  10. Tylkin M.A. Spravochnik termista remontnoy sluzhby [Reference Book for a Heat Treater of the Repair Service]. Moscow, Metallurgiya Publ., 1981, 647 p.

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RELATIONSHIP BETWEEN SHEAR STRESS AND FATIGUESTRENGTH OF METALLIC MATERIALS

Vestnik MGSU 4/2013
  • 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 .
  • 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 31-37

The authors have demonstrated that coefficients of deformation and strength of metals can be applied to identify interrelationship between their shear stress and fatigue strength values.δThe authors have found that coefficient of proportionality ƒconnecting tensileвstrength σand hardness HB of magnesium alloys varies between 0.353 – 0.366 withthe average value equaling to 0.359. The coefficient of proportionality connecting shear stress τср and hardness HB varies between 0.246 – 0.267, and its average value equals to 0.254. Ratio S of shear stress to fatigue strength varies within 1.365 – 1.481, and its average value is equal to 1.410. For aluminum alloys, the above values are lower by 43% and 42%, respectively.δFor carbon steels, the coefficient of proportionality ƒ= 0.312 – 0.349, its averageδvalue is equal to 0.333, and for alloy steels, ƒ= 0.289 – 0.351, its average value is equalto 0.325. Coefficients of proportionality connecting the shear stress and hardness of carbon and alloy steels are equal to 0.172 – 0.229 and 0.134 – 0.223, with their average values being equal to 0.202 and 0.183.Therefore, the authors believe that the relation of shear stress values to fatigue strength values of the above non-ferrous and ferrous metals is close to one.

DOI: 10.22227/1997-0935.2013.4.31-37

References
  1. Gustov Yu.I. Povyshenie iznosostoykosti rabochikh organov i sopryazheniy stroitel’nykh mashin [Improvement of Wear Resistance of Operating Elements and Interfaces of Construction Machinery]. Moscow, 1994, 529 p.
  2. Gustov Yu.I., Gustov D.Yu., Voronina I.V. Metodologiya opredeleniya tribo-tekhnicheskikh pokazateley metallicheskikh materialov [Methodology for Identification of Tribo-engineering Values of Metallic Materials]. Teoreticheskie osnovy stroitel’stva: XV Slovatsko-rossiysko-pol’skiy seminar: sb. dokladov. [Theoretical Fundamentals of Civil Engineering. 15th Slovac-Russian-Polish Workshop. Collected Reports]. Moscow, 2007, pp. 339—342.
  3. Gustov Yu.I. Tribotekhnika stroitel’nykh mashin i oborudovaniya [Tribo-engineering of Construction Machinery and Equipment]. Moscow, MGSU Publ., 2011, 192 p.
  4. Gustov Yu.I., Gustov D.Yu., Yarmolik N.V. Vybor materialov dlya tribosistem i metallo-konstruktsiy stroitel’noy tekhniki [Selection of Materials for Tribosystems and Metal Structures of Construction Machinery]. Interstroymekh — 2008. Materialy Mezhdunar. nauch.-tekhn. konf. [Interstroymech – 2008. Works of International Scientific and Technical Conference]. Vladimir, 2008, vol. 2, pp. 35—40.
  5. Gustov Yu.I. Energotopograficheskiy metod issledovaniya iznosostoykosti metallov [Power Topography Method of Research into Wear Resistance of Materials]. Novoe v metallovedenii. Nauchno-prakticheskiy seminar. Sb. dokladov. [Metal Science News. Scientific and Practical Workshop. Collected Reports.] Moscow, MGSU Publ., 2009, pp. 3—7.
  6. Tylkin M.A. Spravochnik termista remontnoy sluzhby [Reference Book for Repair Service Heat- Treaters]. Moscow, Metallurgiya Publ., 1981, 647 p.
  7. Babichev A.P., Babushkina I.A., Bratkovskiy A.M. Fizicheskie velichiny [Physical Values]. Moscow, Energoatomizdat Publ., 1991, 1232 p.
  8. Arzamasov B.N., Solov’eva T.V., Gerasimov S.A. Spravochnik po konstruktsionnym materialam [Reference Book of Structural Materials]. Moscow, MGTU im. N.E. Baumana Publ., 2005, 640 p.
  9. Sorokin V.G., Volosnikova A.V., Vyatkin S.A. Marochnik staley i splavov [Book of Steel and Alloy Grades]. Moscow, Mashinostroenie Publ.,1989, 640 p.

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