Low velocity ballistic impact behaviour of the Al-matrix composites

Download

119409.pdf

Date

2002

Author

Kaya, Seyfi

Metadata

Show full item record

Item Usage Stats

155
views

0
downloads

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-10vol%B4C and Al-30vol%B4C composites were produced by hot pressing under Nitrogen atmosphere. iiiBoth pure Al and AI-B4C composites were failed by total penetration when impacted by the hammer. In the case of Ck67 steel, the plates could not be penetrated, when their UTS were 827 MPa or higher

Subject Keywords

Drop- weight test, Low velocity ballistic, Al matrix B4C composites, Hot pressing, Powder metallurgy

URI

https://hdl.handle.net/11511/12238

Collections

Graduate School of Natural and Applied Sciences, Thesis

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...
High velocity impact response of high strength aluminum using LS DYNA Başaran, Güralp; Özbayrmoğlu, Erkal; Bütün, Onur; Öney, Eren; Gürses, Ercan (null; 2019-05-14) 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-DY...
Low-velocity impact damage in glass fibre epoxy cylindrical tubes Doyum, Ahmet Bülent; Altay, B (1997-10-01) Types and characteristics of defects produced by low-velocity transverse impact loading on (+/-45 degrees(2), 90 degrees) S-glass and (+/-54 degrees(3), 90 degrees) E-glass fibre reinforced epoxy composites were investigated in this study. For both materials, the specimens were in the form of thin-walled cylindrical tubes. A test set-up capable of producing low-velocity transverse impact at energy levels between 3.5 J and 8.5 J was designed and manufactured. Fifteen specimens were tested from each type of c...
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 ...
High Speed Couette—Poiseuille Flow Stability in Reverse Flow Conditions Ebrinç, Ali Aslan; Özgen, Serkan; Dursunkaya, Zafer (2006-08-21) The linear stability of reverse high speed-viscous plane Couette – Poiseuille flow is investigated numerically. The conservation equations along with Sutherland’s viscosity law are studied using a second order finite difference scheme. Basic velocity and temperature distributions are perturbed by a small amplitude normal-mode disturbance. Small amplitude disturbance equations are solved numerically using a global method to find all the eigenvalues at finite Reynolds numbers. The results indicate that instab...

Citation Formats

S. Kaya, “Low velocity ballistic impact behaviour of the Al-matrix composites,” Middle East Technical University, 2002.