Numerical simulation of impact and fast transient phenomena using AUTODYN™-2D and 3D

Robertson, N.J.; Hayhurst, Colin J.; Fairlie, G E

doi:10.1016/0029-5493(94)90140-6

Cited by 24 publications

(13 citation statements)

References 2 publications

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“…We selected several impact velocity conditions from 0.51 to 0.92 km/s. The pressure and temperature profiles of two different positions (point 1 in the center and point 2 at an off-center position) in the sample chamber were analyzed using AUTODYN-2D version 5 (Century Dynamics, Inc), a numerical method for analyzing impact phenomena that solves the physical equations of mass, momentum, and energy conservation for the relevant materials [Robertson et al, 1994]. The linear shock velocity-particle velocity relationships were input for the container, flyer (SUS304), screw (copper), and liquid water using data from Marsh [1980] without considering phase transitions under the present conditions.…”

Section: Experimental Methodsmentioning

confidence: 99%

Shock wave synthesis of amino acids from solutions of ammonium formate and ammonium bicarbonate

Suzuki

Furukawa

Kobayashi

et al. 2015

Geochem Geophys Geosyst

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The emergence of life's building blocks, such as amino acids and nucleobases, on the prebiotic Earth was a critical step for the beginning of life. Reduced species with low mass, such as ammonia, amines, or carboxylic acids, are potential precursors for these building blocks of life. These precursors may have been provided to the prebiotic ocean by carbonaceous chondrites and chemical reactions related to meteorite impacts on the early Earth. The impact of extraterrestrial objects on Earth occurred more frequently during this period than at present. Such impacts generated shock waves in the ocean, which have the potential to progress chemical reactions to form the building blocks of life from reduced species. To simulate shock-induced reactions in the prebiotic ocean, we conducted shock-recovery experiments on ammonium bicarbonate solution and ammonium formate solution at impact velocities ranging from 0.51 to 0.92 km/s. In the products from the ammonium formate solution, several amino acids (glycine, alanine, ß-alanine, and sarcosine) and aliphatic amines (methylamine, ethylamine, propylamine, and butylamine) were detected, although yields were less than 0.1 mol % of the formic acid reactant. From the ammonium bicarbonate solution, smaller amounts of glycine, methylamine, ethylamine, and propylamine were formed. The impact velocities used in this study represent minimum cases because natural meteorite impacts typically have higher velocities and longer durations. Our results therefore suggest that shock waves could have been involved in forming life's building blocks in the ocean of prebiotic Earth, and potentially in aquifers of other planets, satellites, and asteroids.

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Section: Experimental Methodsmentioning

confidence: 99%

Shock wave synthesis of amino acids from solutions of ammonium formate and ammonium bicarbonate

Suzuki

Furukawa

Kobayashi

et al. 2015

Geochem Geophys Geosyst

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“…All computations were carried out using 2D axial symmetry using a Lagrangian mesh in the explicit non-linear transient dynamic numerical code Autodyn-2D. This software is explained in detail elsewhere [32] and a useful overview of these types of codes is provided by Hazell et al [18]. However in brief, this code solves the conservations laws of mass and momentum based on initial boundary conditions.…”

Section: Materials Modelingmentioning

confidence: 99%

High velocity impact response of Kevlar-29/epoxy and 6061-T6 aluminum laminated panels

et al. 2013

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a b s t r a c tThe high velocity impact response of composite laminated plates has been experimentally investigated using a nitrogen gas gun. Tests were undertaken on sandwich structures based on Kevlar-29 fiber/epoxy resin with different stacking sequence of 6061-T6 Al plates. Impact testing was conducted using cylindrical shape of 7.62 mm diameter steel projectile at a range of velocities (180-400 m/s) were investigated to achieve complete perforation of the target. The numerical parametric study of ballistic impact caused by same conditions in experimental work is undertaken to predict the ballistic limit velocity, energy absorbed by the target and comparison between simulation by using ANSYS Autodyn 3D v.12 software and experimental work and study the effects of shape of the projectile with different (4, 8 and 12 mm) thicknesses on ballistic limit velocity. The sequence of Al plate position (front, middle and back) inside laminate plates of composite specimen was also studied. The Al back stacking sequence plate for overall results obtained was the optimum structure to resist the impact loading.The results obtained hereby are in good agreement with the experimental (maximum error of 3.64%) data where it has been shown that these novel sandwich structures exhibit excellent energy absorbing characteristics under high velocity impact loading conditions. Hence it is considered suitable for applications of armor system.

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“…e model has been solved in Ansys Explicit dynamics in Ansys workbench v18.2 and 19 using Ansys AUTODYN 3D solver [5,6]. e initial condition of the test has been simulated by assigning an initial component velocity to the bullet parts equals to 400 m/s in the Z direction [19,20]. However, in brief, the code solves the conservation laws of mass and momentum in Eulerian or Lagrangian-form based on boundary initial conditions.…”

Section: Analysis Settingsmentioning

confidence: 99%

Simulation and Experimental Tests of Ballistic Impact on Composite Laminate Armor

Soydan

Tunaboylu

Elsabagh

et al. 2018

Advances in Materials Science and Engineering

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is paper presents the experimental testing and simulation results of ballistic impact tests on laminated armor samples that consist of three layers of different materials: fiber-cement, Kevlar fabric, and steel. In experimental tests, a 9 mm FMJ bullet was launched towards a 100 cm 2 sample of the armor from the fiber-cement side. Ansys Workbench Explicit Dynamics and Ansys AUTODYN 3D were used to model and simulate the ballistic impact. Experimental testing and simulation results were compared to analyze the behavior of composite armor designs, and a good agreement was observed.

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Numerical simulation of impact and fast transient phenomena using AUTODYN™-2D and 3D

Cited by 24 publications

References 2 publications

Shock wave synthesis of amino acids from solutions of ammonium formate and ammonium bicarbonate

Shock wave synthesis of amino acids from solutions of ammonium formate and ammonium bicarbonate

High velocity impact response of Kevlar-29/epoxy and 6061-T6 aluminum laminated panels

Simulation and Experimental Tests of Ballistic Impact on Composite Laminate Armor

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