Analysis of deformation history and damage initiation for 6082-T6 aluminium alloy loaded at classic and symmetric Taylor impact test conditions

Moćko, W.; Janiszewski, Jacek; Radziejewska, Joanna; Grązka, Michał

doi:10.1016/j.ijimpeng.2014.08.015

Cited by 27 publications

(14 citation statements)

References 24 publications

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“…They also showed that different conditions exist for ductile damage development in Taylor anvil and rod-on-rod (ROR) impact tests under equivalent velocity resulting in the fact that ductile damage can develop in ROR while it not necessarily can occur in not overdriven Taylor anvil impact test. Similar results were experimentally observed for other metals, [5,6,7].…”

Section: Introductionsupporting

confidence: 90%

Damage development in rod-on-rod impact test on 1100 pure aluminum

Iannitti¹,

Bonora²,

Bourne³

et al. 2017

AIP Conference Proceedings

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Abstract. Stress triaxiality plays a major role in the nucleation and growth of ductile damage in metals and alloys. Although, the mechanisms responsible for ductile failure are the same at low and high strain rate, in impact dynamics, in addition to time resolved stress triaxiality and plastic strain accumulation, pressure also contributes to establish the condition for ductile failure to occur. In this work, ductile damage development in 1100 commercially pure aluminum was investigated by means of rod-on-rod (ROR) impact tests. Based on numerical simulations, using a continuum damage mechanics (CDM) model that accounts for the role of pressure on damage parameters and stochastic variability of such parameters, the impact velocity for no damage, incipient and fully developed damage were estimated. ROR tests at selected velocities were performed and damage distribution and extent were investigated by sectioning of soft recovered samples. Comparison between numerical simulations and experimental results is presented and discussed.

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Section: Introductionsupporting

confidence: 90%

Damage development in rod-on-rod impact test on 1100 pure aluminum

Iannitti¹,

Bonora²,

Bourne³

et al. 2017

AIP Conference Proceedings

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“…Quasi-static tests were carried out at strain rate equal to 0.005 1/s whereas dynamic tests were performed at strain rate equal to 800/s. Split Hopkinson Pressure Bar [3][4][5][6][7][8][9], presented in Fig. 1, was equipped with incident and transmitter bars 20 mm in diameter and 2000 mm in length, which were made of high strength maraging steel, σ y = 2100 MPa.…”

Section: Experimental Methodsmentioning

confidence: 99%

Comparative experimental study of dynamic compressive strength of mortar with glass and basalt fibres

Kruszka

Moćko

Fenu

et al. 2015

EPJ Web of Conferences

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Abstract. Specimen reinforced with glass and basalt fibers were prepared using Standard Portland cement (CEM I, 52.5 R as prescribed by EN 197-1) and standard sand, in accordance with EN 196-1. From this cementitious mixture, a reference cement mortar without fibers was first prepared. Compressive strength, modulus of elasticity, and mod of fracture were determined for all specimens. Static and dynamic properties were investigated using Instron testing machine and split Hopkinson pressure bar, respectively. Content of the glass fibers in the mortar does not influence the fracture stress at static loading conditions in a clearly observed way. Moreover at dynamic range 5% content of the fiber results in a significant drop of fracture stress. Analysis of the basalt fibers influence on the fracture stress shows that optimal content of this reinforcement is equal to 3% for both static and dynamic loading conditions. Further increase of the fiber share gives the opposite effect, i.e. drop of the fracture stress.

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“…The investigated specimen was treated as a beam, supported on both sides, and loaded with a centrally focused force. The deflection of such a beam f is described as follows: (15) After the transformation taking into account the moment of inertia of the rectangular cross section, there is: (16) For the impact load model in question: (17) maximum stresses are the quotient of the bending moment and the flexural strength factor: (18) and the maximum deformation is described by the dependency: (19) In order to calculate the speeds of the deformation, it is necessary to divide them by the time after which there will be a deflection of the sample valued f: (20) where V is the speed of the pendulum.…”

Section: The Speed Of Deformation Of the Test Specimensmentioning

confidence: 99%

An Energy Analysis of Impact Strength Tests Using Pendulum Hammers

Godzimirski¹,

Komorek²,

Komorek³

2019

Adv. Sci. Technol. Res. J.

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An attempt to estimate the value of the deformation energy of a metal specimen and the research system during impact strength tests on pendulum hammers was made. In the experimental research it was found that the rectangular metal specimens of the same cross-sectional area exhibit different impact strength, depending on the direction of the load (bending stiffness) whereas the destruction work of such samples exposed to static bending is comparable. The article presents the results of the experimental research, completed with numerical calculations carried out to assess the value of the deformation energy during the impact tests. By performing numerical calculations, the authors estimated the deformation energies of specimens characterised by elastoplastic properties with reinforcement (bilinear) under destructive loads. The energy of the elastic deformation of the hammer arm was estimated analytically. On the basis of the research, it was found that in the impact strength test, a large part of the recorded energy is connected with the deformation of the test device, in particular, the pendulum which undergoes bending. Moreover, the recorded impact strength of the material is not proportional to its actual impact strength.

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Analysis of deformation history and damage initiation for 6082-T6 aluminium alloy loaded at classic and symmetric Taylor impact test conditions

Cited by 27 publications

References 24 publications

Damage development in rod-on-rod impact test on 1100 pure aluminum

Damage development in rod-on-rod impact test on 1100 pure aluminum

Comparative experimental study of dynamic compressive strength of mortar with glass and basalt fibres

An Energy Analysis of Impact Strength Tests Using Pendulum Hammers

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