Strain-controlled testing advantages at static tension and repeated-static tension

Erasov V.S., Avtaev V.V., Oreshko E.I., Yakovlev N.O.
UDC
620.1
DOI
10.18577/2307-6046-2018-0-9-92-104
Article PDF (Russian) (855.64 KB)
How to cite
Erasov V.S., Avtaev V.V., Oreshko E.I., Yakovlev N.O. Strain-controlled testing advantages at static tension and repeated-static tension // Proceedings of VIAM. 2018. No. 9. DOI: 10.18577/2307-6046-2018-0-9-92-104. URL: https://test.viam.ru/en/journal/2018/9/10
Keywords
mechanical testing, mechanical characteristics, strain-controlled testing, tension, fatigue, damage function.
Abstract

The article presents advantages strain-controlled testing over force-controlled testing at static tension and repeated-static (fatigue) with a fixed deformation step. In addition to the traditional mechanical properties of materials (elastic modulus E, yield strength σ0,2, tensile strength σв, permanent deformation δ), obtained from the stress-strain diagram at tensile test, introduction of additional characteristics (plastic deformation rate \( \dot{\varepsilon}_n \), material damage function of the specimen ω, damage velocity ) subject to stress-strain diagram with strain-controlled testing is suggested. The stress-strain diagram relationship with the envelope of the line when the strain-controlled repeated-static testing with a fixed deformation step introduced. Approaches to determining fatigue characteristics using test data in this manner at fatigue testing are showing. For 1441-T1 and 1163-ATB alloys under repeated-static testing, a characteristic effect is observe. A plastic deformation in a certain deformation range is realize discretely at the same stresses (similar to the yield plateau during tension). For alloy B-1481-T1, there is no similar effect.

Reference list
  1. Lebedev A.A., Lamashevskij V.P., Muzyka N.R., Shvets V.P., Yakimenko E.V. Kinetika nakopleniya rasseyannykh povrezhdenij v polikristallicheskikh materialakh s raznym razmerom zerna pri malykh deformatsiyakh [Kinetics of Accumulation of Scattered Damages in Polycrystalline Materials with Different Grain Size at Small Deformations] // Problemy prochnosti. 2011. №5. S. 32–44.
  2. Makhutov N.A., Moskvitin G.V. Vliyanie uslovij nagruzheniya na nakoplenie povrezhdenij i razrushenie [Influence of loading conditions on damage accumulation and destruction] // Mashinostroenie: entsiklopediya. M.: Mashinostroenie, 2010. T. II-I: Fiziko-mekhanicheskie svojstva. Ispytaniya metallicheskikh materialov. S. 220–221.
  3. Kablov E.N. Kontrol kachestva materialov – garantiya bezopasnosti ekspluatatsii aviatsionnoj tekhniki [Quality control of materials - guarantee of safety of operation of aviation equipment] // Aviacionnye materialy i tehnologii. 2001. №1. S. 3–8.
  4. Erasov V.S., Yakovlev N.O., Nuzhnyj G.A. Kvalifikatsionnye ispytaniya i issledovaniya prochnosti aviatsionnyh materialov [Qualification tests and researches of durability of aviation materials] // Aviacionnye materialy i tehnologii. 2012. №S. S. 440–448.
  5. Oreshko E.I., Erasov V.S., Lucenko A.N., Terentev V.F., Slizov A.K. Postroenie diagramm deformirovaniya v trehmernom prostranstve σ–ε–t [Creation of the 3D stress-strain diagrams σ–ε–t] // Aviacionnye materialy i tehnologii. 2017. №1 (46). S. 61–68. DOI: 10.18577/2071-9140-2017-0-1-61-68.
  6. Erasov V.S., Bajramukov R.R., Nuzhnyj G.A. Opredelenie skorosti plasticheskoj deformatsii pri ispytanii na rastyazhenie [Determination of the rate of plastic deformation in the tensile test] // Zavodskaya laboratoriya. Diagnostika materialov. 2014. T. 80. №5. S. 61–63.
  7. Erasov V.S., Nuzhnyj G.A. Zhestkij tsikl nagruzheniya pri ustalostnykh ispytaniyakh [A rigid cycle of loading during fatigue tests] // Aviatsionnye materialy i tekhnologii. 2011. №4. S. 35–40.
  8. Erasov V.S. Deformatsiya, napryazhenie, vremya pri ispytaniyakh na rastyazhenie [Deformation, stress, time for tensile tests] // Trudy TSAGI. 2015. №2751. S. 107–115.
  9. Erasov V.S., Oreshko E.I., Lutsenko A.N. Povrezhdaemost materialov pri staticheskom rastyazhenii [Damageability of materials in tension testing] // Aviacionnye materialy i tehnologii. 2015. №4 (37). S. 91–94. DOI: 10.18577/2071-9140-2015-0-4-91-94.
  10. Erasov V.S., Nuzhnyj G.A., Grinevich A.V. Ob otsenke povrezhdaemosti metallicheskikh materialov metodami mekhanicheskikh ispytanij [On the evaluation of the damageability of metallic materials by the methods of mechanical testing] // Deformatsiya i razrushenie materialov. 2015. №3. S. 42–47.
  11. Erasov V.S., Nuzhnyj G.A., Grinevich A.V., Terehin A.L. Treshhinostojkost aviacionnyh materialov v processe ispytaniya na ustalost [Crack growth resistance of aviation materials in fatigue testing] // Trudy VIAM: elektron. nauch.-tehnich. zhurn. 2013. №10. St. 06. Available at: http://www.viam-works.ru (accessed: March 31, 2018).
  12. Kablov E.N. Innovacionnye razrabotki FGUP «VIAM» GNC RF po realizacii «Strategicheskih napravlenij razvitiya materialov i tehnologij ih pererabotki na period do 2030 goda» [Innovative developments of FSUE «VIAM» SSC of RF on realization of «Strategic directions of the development of materials and technologies of their processing for the period until 2030»] // Aviacionnye materialy i tehnologii. 2015. №1 (34). S. 3–33. DOI: 10.18577/2071-9140-2015-0-1-3-33.
  13. MMPDS-02. Metallic Materials Properties Development and Standardization. Atlantic City: Federal Aviation Administration, 2005. P. 1–36.
  14. Kablov E.N., Antipov V.V., Klochkova Yu.Yu. Alyuminij-litievye splavy novogo pokoleniya i sloistye alyumostekloplastiki na ikh osnove [Aluminum-lithium alloys of a new generation and layered aluminum-plastic plastics on their basis] // Tsvetnye metally. 2016. №8 (884). S. 86–91.
  15. Gorev B.V., Banshchikova I.A. K opisaniyu nispadayushchego uchastka krivoj deformirovaniya «napryazhenie–deformatsiya» po kineticheskim uravneniyam so skalyarnym parametrom povrezhdaemosti [To the description of the descending section of the strain-strain curve for kinetic equations with a scalar damping parameter] // Vestnik Samarskogo gosudarstvennogo tekhnicheskogo universiteta. Ser.: Fiziko-matematicheskie nauki. 2008. №2 (17). S. 110–117.
  16. Terentev V.F. Ustalost metallicheskikh materialov [Fatigue of metal materials]. M.: Nauka, 2003. S. 37–44.
  17. Vildeman V.E., Tretyakov V.P. Ispytaniya materialov s postroeniem polnykh diagramm deformirovaniya [Tests of materials with construction of complete diagrams of deformation] // Problemy mashinostroeniya i nadezhnosti mashin. 2013. №2. S. 93–98.