DETERMINING OF FORMING LIMIT STRESS DIAGRAM FOR AL5083-H321 ALLOY BY CRUCIFORM SPECIMEN

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FARHADZADEH F.; SALMANI TEHRANI M.; TAJDARI M.

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Journal: MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING) Year:2019 | Volume:35-3 | Issue:1 Page(s): 71-81

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Title

DETERMINING OF FORMING LIMIT STRESS DIAGRAM FOR AL5083-H321 ALLOY BY CRUCIFORM SPECIMEN

Author(s)

FARHADZADEH F. | SALMANI TEHRANI M. | TAJDARI M. | Issue Writer Certificate

Keywords

Cruciform specimenQ1

Al.alloy 5083-H321Q1

biaxial loadingQ1

forming limit stress diagram fracture (FLSD)Q1

Abstract

This paper deals with experimental and numerical studies of fracture behavior of Al. 5083-H321 alloy, under uniaxial and biaxial tensile loadings. In order to experimentally investigate biaxial fracture behavior, Cruciform specimens were prepared using electrochemical method, based on Lionel proposed model. The specimens were gridded by electrochemical etching method. A dependent biaxial tension mechanism was also designed and fabricated with relatively high precision machining methods. Installing the mechanism on an INSTRON-1343uniaxial machine, the experimental biaxial tests were performed at ambient temperature and strain rate of 0. 0003 $sec^{-1}$. Different aspects of the facture behavior, which may be of more interest to study, include initiation and development of fracture pattern, fracture path on the specimen section, and the force diagram for each of the arms. ABAQUS commercial software was utilized to simulate the biaxial tension test. Damage model was incorporated into the FE simulations to enable the FE model to capture the fracture occurrence in the Cruciform specimen. Displacement loading with different ratios was applied to the specimen arms in the FE model to study the effect of loading ratio on the fracture of the material. Experimental and numerical results for location of crack initiation, path of crack growth and also the arms force diagram were compared and a good correlation was observed between. The experimental results reveal that the fracture grows along the corner-to-corner diagonal line, in the test section zone of the specimen. Simulation results show that minimal strains occur in the test section zone, near the arms. Experimentally measuring the fracture stress is one of the great challenges, and hence, numerical simulation would be very useful in this regard. Maximum of stress gradient in the simulation results is observed along the corner-to-corner direction, in the test section zone. Based on the simulation results, some fracture biaxial points were obtained in the first quarter of the biaxial stress plane subspace. These fracture stress point can be used to determine the material fracture loci in the first quarter of the biaxial stress plane subspace.

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APA: Copy

FARHADZADEH, F., SALMANI TEHRANI, M., & TAJDARI, M.. (2019). DETERMINING OF FORMING LIMIT STRESS DIAGRAM FOR AL5083-H321 ALLOY BY CRUCIFORM SPECIMEN. MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING), 35-3(1 ), 71-81. SID. https://sid.ir/paper/364037/en

Vancouver: Copy

FARHADZADEH F., SALMANI TEHRANI M., TAJDARI M.. DETERMINING OF FORMING LIMIT STRESS DIAGRAM FOR AL5083-H321 ALLOY BY CRUCIFORM SPECIMEN. MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING)[Internet]. 2019;35-3(1 ):71-81. Available from: https://sid.ir/paper/364037/en

IEEE: Copy

F. FARHADZADEH, M. SALMANI TEHRANI, and M. TAJDARI, “DETERMINING OF FORMING LIMIT STRESS DIAGRAM FOR AL5083-H321 ALLOY BY CRUCIFORM SPECIMEN,” MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING), vol. 35-3, no. 1 , pp. 71–81, 2019, [Online]. Available: https://sid.ir/paper/364037/en

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