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Mojtaba Zolfaghari

Mojtaba Zolfaghari

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId: 35200092900
Faculty: Engineering
Address: Arak University
Phone:

Research

Title
Modifications to Walker-anderson Model for Analysis of High-velocity Penetration of an Eroding Long-rod Projectile into Semi-infinite Concrete Targets
Type
JournalPaper
Keywords
Eroding Projectile, Concrete ResistanceAnalytical Model, Long Rod Penetration
Year
2017
Journal International Journal of Engineering
DOI
Researchers Mojtaba Zolfaghari

Abstract

This paper presents a modified form of the Walker-Anderson (W-A) model for analyzing high velocity penetration of an eroding projectile into a concrete target in which the W-A model is improved by incorporating calculations for the plastic flow field of concrete in terms of its compressibility and strain rate sensitivity under severe pressure. With the changes to and calculations of plastic field in concrete targets, equations of penetration were rearranged. Solution of equations gives penetration depth, penetration velocity, projectile rod velocity and length of a projectile instantaneously. Results of this analysis were compared with experiments performed by authors of this paper`. Experiments were performed in order to test eroding long-rod (9≤L/d≤11) penetration into semi-infinite concrete targets at high impact velocities (650 (m/s)