DAMAGE AND EFFECTIVE STRESS-STRAIN DIAGRAM OF ALUMINUM ALLOY 1520

Д. К. Фам, А. П. Халимон

Abstract


Purpose. The aim is to improve methods of constructing true and effective diagrams, analysis of approaches to determine the parameters of the damage on the aluminum alloy AMg2 specimens.

Design/methodology/approach. To find the effective stress, we need to know the value of true stress and damage parameter.
Effective strain diagram must also construct a curve of damage accumulation. There are different ways of experimental determination of damage, one of the most simple and convenient is to measure the degradations of elastic modulus. All date for calculations obtained from stress-strain curve
.

Findings. During the test is not always possible to establish the transverse strain sensor in the place of neck beginning, after the rupture, the measured values of width and thickness of the samples do not match. Table 3 shows the comparison of the results.

Originality/value. Application of the proposed method allows obtaining stress-strain diagram in the coordinates of the effective stress-strain without the use of additional equipment, while giving accurate results. Simplified procedure and reduces the time of the experiment and analyzing the results of the experiment.


Keywords


damage, effective stress, the true diagram, aluminum

References


Kachanov, L. M., "On Creep Rupture Time," Proc. Acad. Sci., USSR, Div. Eng. Sci., 8, 1958, pp. 26–31.

Rabotnov Yu. N., Creep in Structural Elements [in Russian], Nauka, Moscow, 1966.

Tomuzh V.P., Kuksenko V.S. Makromehanika razrushenija polimernyh materialov. Riga: Zinatne, 1978.

Bridgman P. Studies in large plastic fow and fracture. New York: McGraw-Hill, 1952.

Marcilio Alves, Jilin Yu, Norman Jones On the elastic modulus degradation in continuum damage mechanics: Computers and Structures 76 (2000) 703-712.

Birger I. A., Mavljutov R. R. Soprotivlenie materialov: Uchebnoe posobie. Minsk.: Nauka. Gl. red. fiz.-mat. lit., 1986. 560.

Dufailly J. Modelisation mecanique et identification de l'endomagement plastique des metaux. Ph.D. thesis, Laboratoire de Mecanique et Technologie, Universite P.M. Curie. Cachan, France, 1980.

Nouailhas D. Etude experimentale de l'endomagement de plasticite ductile anisotrope. Ph.D. thesis, Laboratoire de Mecanique et Technologle, Universite P.M. Curie. Cachan, France, 1980.

C.L. Chow and June Wang. An anisotropic theory of elasticity for continuum damage mechanics International Journal of Fracture 33:3-16 (1987)

Broberg H. Damage measures in creep deformation and rupture. Swedish Solid mechanics Report 8 (1974), pp.100-104

Bobyr M., Khalimon O., Bondarets O., Phenomenological Damage models of Anisotropic Structural Materials, National Technical University of Ukraine”Kyiv Polytechnic Institute” 2013:5-13

Lemaitre J, Dufailly J. Damage measurements. Engineering Fracture Mechanics 1987;28(5/6):643-61.

Asundi A. Damage measurement in aluminium using the Moirea method. In: Jono M, Inoue T, editors. Mechanical behaviour of materials, VI. Pergamon Press, 1991. pp. 823-8.

Albert C.J. Luo, Yanghu Mou and Ray Es. Hana large anisotropic damage theory based on an incremental complementary energy equivalence model. International Journal of Fracture 70: 19-34, 1995.

Lemaitre J., Desmorat R., Sauzay M. Anisotropic damage law of evolution. Eur. J. Mech. A/Solids 19, 2000, pp. 187-208.

Sidoroff F. Description of anisotropic damage application to elasticity IUTAM Colloquium, Physical Nonlinearities in Structural Analysis, 1981, pp. 237-244.


GOST Style Citations


1. Kachanov, L. M., "On Creep Rupture Time," Proc. Acad. Sci., USSR, Div. Eng. Sci., 8, 1958, pp. 26–31.


2. Rabotnov Yu. N., Creep in Structural Elements [in Russian], Nauka, Moscow, 1966.


3. Томуж В.П., Куксенко В.С. Макромеханика разрушения полимерных материалов. – Рига: Зинатне, 1978.


4. Bridgman P. Studies in large plastic fow and fracture. New York: McGraw-Hill, 1952.


5. Marcilio Alves, Jilin Yu, Norman Jones On the elastic modulus degradation in continuum damage mechanics: Computers and Structures 76 (2000) 703-712.


6. Биргер И. А., Мавлютов Р. Р. Сопротивление материалов: Учебное пособие.— М.: Наука. Гл. ред. физ.-мат. лит., 1986.— 560 с.


7. Dufailly J. Modelisation mecanique et identification de l'endomagement plastique des metaux. Ph.D. thesis, Laboratoire de Mecanique et Technologie, Universite P.M. Curie. Cachan, France, 1980.


8. Nouailhas D. Etude experimentale de l'endomagement de plasticite ductile anisotrope. Ph.D. thesis, Laboratoire de Mecanique et Technologle, Universite P.M. Curie. Cachan, France, 1980.


9. C.L. Chow and June Wang. An anisotropic theory of elasticity for continuum damage mechanics International Journal of Fracture 33:3-16 (1987)


10. Broberg H. Damage measures in creep deformation and rupture. Swedish Solid mechanics Report 8 (1974), pp.100-104


11. Bobyr M., Khalimon O., Bondarets O., Phenomenological Damage models of Anisotropic Structural Materials, National Technical University of Ukraine”Kyiv Polytechnic Institute” 2013:5-13


12. Lemaitre J, Dufailly J. Damage measurements. Engineering Fracture Mechanics 1987;28(5/6):643-61.


13. Asundi A. Damage measurement in aluminium using the Moirea method. In: Jono M, Inoue T, editors. Mechanical behaviour of materials, VI. Pergamon Press, 1991. pp. 823-8.


14. Albert C.J. Luo, Yanghu Mou and Ray Es. Hana large anisotropic damage theory based on an incremental complementary energy equivalence model. International Journal of Fracture 70: 19-34, 1995.


15. Lemaitre J., Desmorat R., Sauzay M. Anisotropic damage law of evolution. Eur. J. Mech. A/Solids 19, 2000, pp. 187-208.


16. Sidoroff F. Description of anisotropic damage application to elasticity IUTAM Colloquium, Physical Nonlinearities in Structural Analysis, 1981, pp. 237-244.





DOI: http://dx.doi.org/10.20535/2305-9001.2014.72.37145

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Mechanics and Advanced Technologies