High velocity impact response of high strength aluminum using LS DYNA

Date

2019-05-14

Author

Başaran, Güralp
Özbayrmoğlu, Erkal
Bütün, Onur
Öney, Eren
Gürses, Ercan

Metadata

Show full item record

Item Usage Stats

312
views

0
downloads

Experimental and numerical studies were conducted to determine the impact response for high strength aluminum armor. A series of ballistic impact tests were carried out for the impact of a 20mm Fragment Simulating Projectile (FSP) with 25.4mm high strength aluminum armor plate at 960m/s impact velocity. This study deals with the measurement of ballistic limits of the deformable FSP against high strength aluminum armor material. The numerical models were developed using the explicit finite element code LS-DYNA®. All parts in the model are modeled with Modified Johnson-cook material model calibrated with performed tests in the company. Material properties are not shared due to confidential issues. A high-speed camera was used for calculation of projectile residual velocities and projectile output images. The numerical model was validated with live test results and a good agreement was achieved between experiments and numerical results. Parameter sensitivity analyses were performed to examine the effect of material model's parameters on the response.

URI

https://hdl.handle.net/11511/77384

Conference Name

European LS DYNA Conference, (14 - 16 Mayıs 2019)

Collections

Department of Aerospace Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Low velocity ballistic characterization of steel armour plates by drop-weight test Şimşir, Caner; Ögel, Bilgehan; Department of Metallurgical and Materials Engineering (2002) The primary aim of this study was to investigate the parameters that affect the low velocity ballistic performance of thin steel armour. Investigated parameters include armour plate related parameters (Hardness, UTS, Yield Strength etc.) and projectile related parameters (Hardness, Nose geometry). The relationships between the low velocity ballistic performance of steel armour plates and the static mechanical properties and mechanisms of ballistic failure are also investigated. For this purpose, a drop-weig...
Low velocity impact characterization of monolithic and laminated AA 2024 plates by drop weight test Kalay, Yunus Eren; Ögel, Bilgehan; Department of Metallurgical and Materials Engineering (2003) The objective of this study was to investigate the low velocity impact behavior of both monolithic and laminated aluminum alloy plates. For this purpose, a drop-weight test unit was used. The test unit included the free fall and impact of an 8 kg hammer with an 8 mm punching rod from 0.5 m to 4 m. The relationship between the change in static mechanical properties (hardness, ultimate tensile strength, yield strength, strain hardening rate) and low velocity impact behavior of monolithic aluminum plates were ...
Low velocity ballistic impact behaviour of the Al-matrix composites Kaya, Seyfi; Ögel, Bilgehan; Yıldırım, Orhan; Department of Metallurgical and Materials Engineering (2002) In this study, a drop-weight set-up was used for low velocity ballistic behaviour of various materials. The test includes the free fall of 5 kg hammer from a height of 4 m and impacting the specimen with a 8 mm diameter punching rod. The criteria in the test is penetration/no penetration as well as the failure mechanism in the tested specimen. The test materials were selected as Ck67 steel, pure Al, and AI-B4C composites. The Ck67 steel plate was quenched and tempered to yield UTS of 800 MPa and higher. Al-...
The effect of double austenitization on the microstructure and toughness of AISI M2 high speed steel Ögel, Bilgehan (1998-06-01) In this study, the effect of double austenitization on microstructure and toughness of AISI M2 high speed steel was investigated. For double austenitization treatment, the specimens, which are hardened initially at 1220 degrees C and quenched in air, were hardened for a second time in the temperature range 1150 - 1050 degrees C. For comparison purposes, another set of specimens is austenitized singly in the temperature range 1150 - 1050 degrees C. Tempering process was carried out between 500 - 640 degrees ...
High frequency capacitively coupled RF plasma discharge effects on the order/disorder structure of PAN-based carbon fiber Güngör, Ümmugül E.; Bilikmen, Sinan; Akbar, Demiral (Springer Science and Business Media LLC, 2014-5-14) High-resolution confocal Raman microscopy was used to investigate the effects of nitrogen plasma on unsized high strength (HS) PAN-based carbon fiber surfaces. The fibers were treated by a high frequency (40.68 MHz) capacitively coupled single RF-PECVD reactor under different processing conditions (exposure times, RF powers and gas pressures). It was found that the order/disorder structure of the treated carbon fiber changed with different processing conditions. At low pressures, the degree of disordered st...

Citation Formats

G. Başaran, E. Özbayrmoğlu, O. Bütün, E. Öney, and E. Gürses, “High velocity impact response of high strength aluminum using LS DYNA,” presented at the European LS DYNA Conference, (14 - 16 Mayıs 2019), Koblenz, Germany, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/77384.