Deformation and fracture of square plates under repetitive impact loading

Breslavsky, Dmytro; Morachkovsky, Oleg; Наумов, Иван Владимирович; Ganilova, Olga A.

doi:10.1016/j.ijnonlinmec.2017.10.020

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…In this study, the necessary dynamic stress-strain curve as well as the correct value of the optimum D/D o was obtained by solving equation ( 10) and equation ( 19) for a range of D/D o values at three impact velocities (10, 20, and 30 m/s) using the Excel Õ program. As the result, the nearly constant strain rates were achieved at D/D o values of 0.34, 0.48, and 0.58 at impact velocities of 10, 20, and 30 m/s, respectively, for the SHB instrument (Tables 1 and 2) and a 5 mm-thick Armco Õ iron specimen (a 3 , and c p ¼ 452 Jkg -1 K -1 ). 8,a The obtained stress-strain curves and ratestrain curves for the iron specimen are shown in Figure 12(a) and Figure 12(b), respectively.…”

Section: Predicting the Maximum Strainmentioning

confidence: 83%

“…Relying solely on experimental approaches for the design/understanding of the highstrain-rate behaviour of solids and structures may not be practical because of the burden of cost and time; however, an experimental verification of the design result is inevitable. Modelling and simulation (M & S) [1][2][3][4][5][6][7] helps one to understand the evolution of the high-strain-rate phenomena on a step-by-step basis and is a time-and cost-efficient design approach. Therefore, it is advantageous to combine the M & S-based design with experimental verification of the mechanical behaviour of solids and structures exposed to high-strain-rate events.…”

Section: Introductionmentioning

confidence: 99%

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Evolution of specimen strain rate in split Hopkinson bar test

Shin

Kim

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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The specimen strain rate in the split Hopkinson bar (SHB) test has been formulated based on a one-dimensional assumption. The strain rate is found to be controlled by the stress and strain of the deforming specimen, geometry (the length and diameter) of specimen, impedance of bar, and impact velocity. The specimen strain rate evolves as a result of the competition between the rate-increasing and rate-decreasing factors. Unless the two factors are balanced, the specimen strain rate generally varies (decreases or increases) with strain (specimen deformation), which is the physical origin of the varying nature of the specimen strain rate in the SHB test. According to the formulated strain rate equation, the curves of stress–strain and strain rate–strain are mutually correlated. Based on the correlation of these curves, the strain rate equation is verified through a numerical simulation and experiment. The formulated equation can be used as a tool for verifying the measured strain rate–strain curve simultaneously with the measured stress–strain curve. A practical method for predicting the specimen strain rate before carrying out the SHB test has also been presented. The method simultaneously solves the formulated strain rate equation and a reasonably estimated constitutive equation of specimen to generate the anticipated curves of strain rate–strain and stress–strain in the SHB test. An Excel® program to solve the two equations is provided. The strain rate equation also indicates that the increase in specimen stress during deformation (e.g., work hardening) plays a role in decreasing the slope of the strain rate–strain curve in the plastic regime. However, according to the strain rate equation, the slope of the strain rate–strain curve in the plastic deformation regime can be tailored by controlling the specimen diameter. Two practical methods for determining the specimen diameter to achieve a nearly constant strain rate are presented.

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Section: Predicting the Maximum Strainmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Evolution of specimen strain rate in split Hopkinson bar test

Shin

Kim

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…А у 2005 році Д.В. Бреславський сам становиться завідувачем цієї кафедри, деканом інженерно-фізичного факультету він працював з 2000 р. Увесь творчий та професійний шлях Дмитра Васильовича проходить разом з видатними вченими, авторами багатьох наукових монографій та навчальної літератури [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Issn 2078-9130unclassified

Dmytro Vasylovych Breslavsky – an outstanding scientist - mechanic (on the 60th anniversary of birth)

Morachkovsky¹

2020

Bulletin NTU "KhPI": JDSM

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“…Spranghers et al [12] proposed an inverse method that uses full-field optical measurements taken during the first milliseconds of a free air explosion to identify the plastic response of aluminum plates subjected to sudden blast loads, and the results verify that the proposed methods can be successfully used to analyse the plastic behaviour of metals subjected to blast waves. Breslavsky et al [13] experimentally and numerically studied the deformation and fracture of impact-loaded thin steel square plates and discussed the numerical-experimental approach for fracture prediction in plates under repetitive impact loading. Zheng et al [14] investigated the large deflection behaviour of clamped stiffened plates subjected to confined blast loads through experiments, theoretical analysis, and numerical simulations; it was proven that the proposed calculation model is of high precision and practicability by comparing the numerical results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Deformation and Damage of Clamped Square Plates under Near‐Field Explosion Loads

Guan

Hui-pin

et al. 2018

Shock and Vibration

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The deformation and damage mechanism of shell structures under near-field explosion loads has been of great significance in the theoretical study of impact dynamics and may serve as a dependable theoretic basis for the antiexplosion design of shell structures. In this paper, the plastic zone and crevasse size of clamped square plates under near-field explosion loads were discussed based on the plastic hinge law and energy theory. The crevasse size of a plate moving at motion modes Ι and ΙΙ under medium load was obtained according to the ultimate plastic strain criterion. Furthermore, the plastic zone under a high load was determined in terms of the movement law of a plastic hinge line. When the applied load ended, the crevasse sizes of the plates at motion modes III and IV were deduced on the basis of the principle of energy conservation. Finally, numerical simulation was used to analyse the deformation and damage mechanism of the shell structures under near-field explosion loads. The theory and method proposed in this paper are verified using ANSYS software and compared with the experimental results. This study verifies the validity of the proposed approach for analysis of the deformation and damage of a clamped square plate under near-field explosion loads.

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Deformation and fracture of square plates under repetitive impact loading

Cited by 5 publications

References 17 publications

Evolution of specimen strain rate in split Hopkinson bar test

Evolution of specimen strain rate in split Hopkinson bar test

Dmytro Vasylovych Breslavsky – an outstanding scientist - mechanic (on the 60th anniversary of birth)

Analysis of the Deformation and Damage of Clamped Square Plates under Near‐Field Explosion Loads

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