Fracture characterization of a cast aluminum alloy aiming machining simulation

Silva, Tef; Gain, Suresh; Pinto, D; Jesus, Abílio M.P. De; Xavier, José; Reis, Ana; Rosa, P.A.R.

doi:10.1177/1464420718799116

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…Proper fracture criteria are required for chip separation from the workpiece in the cutting process. 39,40 As a phenomenological model, the fracture criterion can be used to predict the onset, progression, and end of a fracture in the metal cutting process simulation. To realize the chip separation from the workpiece, the Johnson-Cook fracture criterion was used in this simulation.…”

Section: Numerical Modeling Of Turning Processmentioning

confidence: 99%

Investigation of the turning process of the TC21 titanium alloy: Experimental analysis and 3D simulation

Pei

Shu

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Titanium alloys are widely used in the aerospace industry due to their superior properties such as high strength and low density. As a new titanium alloy with higher strength and lower heat conductivity, titanium alloy TC21 is very difficult to cut and the cutting mechanism of this alloy needs to be investigated deeply. In the paper, to observe the cutting phenomenon in the turning process of TC21 alloy, a series of turning experiments have been performed to investigate the turning process of TC21 alloy. Further, the influence of some important turning parameters (cutting speed, feed speed, depth of cut and rake angle) on cutting force and chip morphology is well analyzed through the experiments. In addition, a 3D finite element model for turning was established using the software ABAQUS for helping to analyze the turning process of TC21. Through simulation, cutting force, chip formation and temperature distribution of TC21 alloy in the turning process have been achieved. At the same time, simulated cutting forces and chip morphology were compared with the results of experiment. The results of experiments showed that the chip of TC21 alloy in turning process is serrated and the rake angle of tool has the obvious effect on the chip morphology.

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Section: Numerical Modeling Of Turning Processmentioning

confidence: 99%

Investigation of the turning process of the TC21 titanium alloy: Experimental analysis and 3D simulation

Pei

Shu

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Glass and ceramic are usually modeled with brittle rupture models 1–3 while steel and aluminum are modeled by ductile rupture models. 4,5 This study investigates the ductile rupture of aluminum bars by shearing process. It is possible to compute rupture with damage models as long as the damage considered is concentrated on a small area, keeping in mind that the choice of the damage model should be appropriate to the studied process and material in order to obtain accurate results.…”

Section: Introductionmentioning

confidence: 99%

Parametric study of aluminum bar shearing using Johnson-Cook material modeling

Moakhar

Hentati

Barkallah

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Previous studies of the shearing process demonstrated that clearance and shear rate are the most influential parameters on the geometry of sheared billets. This paper illustrates a parametric numerical study of the impact of these parameters on the quality of the shear surface using the finite element simulation of shearing. In order to account for interactions between stress state evolution and the associated heating during shearing, a fully coupled thermo-mechanical simulation method was adopted. The influence of stress state, strain rate, and temperature on the material behavior were taken into account by using Johnson-Cook plasticity and ductile failure models. Many simulations were carried out involving diverse shear rates and shear clearances. The relationship between the parameters of shear surface geometry and the temperature was illustrated and proven. Contrary to the expectation of high-speed shearing performance, a burr free smooth shear surface was found using a low shear rate. This study illustrates a numerical strategy to determine the best shear clearance-rate set for aluminum alloy Al7075-T6 bars that minimizes the shear surface defects.

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“…There are three main types of constitutive equations that generally describe the high-temperature rheological properties of metals: the empirical model, the probability model, and the internal variable model. The empirical model is the most widely used one in practice among them [6,7]. An empirical constitutive model is based on dislocation and dynamic recrystallization theories.…”

Section: Introductionmentioning

confidence: 99%

Constitutive Model of 30CrMoA Steel with Strain Correction

Zhang

Shu

Wang

et al. 2020

Metals

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It is necessary to establish a constitutive model of 30CrMoA steel to optimize the forming shape and mechanical properties of high-speed train axles. The experimental stress–strain curve of 30CrMoA steel was obtained by an isothermal compression test on a Gleeble-3500 thermal simulation test machine under temperature of 1273~1423 K and strain rate of 0.01~10 s−1. Considering the effect of strain on the material constant, an empirical constitutive model was proposed with strain correction for 30CrMoA steel. In addition, the material constant in the constitutive model is determined by linear regression analysis of the experimental stress–strain curve. Comparing the theoretical value and experimental value of flow stress, the correlation R is 0.9828 and the average relative error (ARRE) is 4.652%. The constitutive model of 30CrMoA steel with strain correction can reasonably predict the flow stress under various conditions. The results provide an effective numerical tool for further study on accurate near-net forming of high-speed train axles.

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Fracture characterization of a cast aluminum alloy aiming machining simulation

Cited by 3 publications

References 25 publications

Investigation of the turning process of the TC21 titanium alloy: Experimental analysis and 3D simulation

Investigation of the turning process of the TC21 titanium alloy: Experimental analysis and 3D simulation

Parametric study of aluminum bar shearing using Johnson-Cook material modeling

Constitutive Model of 30CrMoA Steel with Strain Correction

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