ME 4233/6233 Fundamentals of FEA

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Description

The Taylor impact test is an experimental technique used to determine dynamic material response and to validate constitutive models used in numerical simulations. It generally consists of shooting a cylinder rod of a select material against a rigid target at different velocities. After impact, the plastic deformation of the cylinder is recorded and is directly compared to numerical predictions. Another application for Taylor impact was proposed by Li et al. (2021) where the nose shape of the cylinder is modified to create different loading environments that can test electronic equipment in penetration weapons. FEA models where designed in ABAQUS/Explicit to recreate the force pulse shape and deformation of Taylor impact tests consisting of 3A21 Al rods with blunt, hemispherical, truncated ogive, and truncated conical nose shapes. A Johnson-Cook constitutive model was developed from available characterization tests, as well surrogate material data. Results showed good agreement in the deformation characteristics of the projectiles with experimental measurements, but failed to predict the distinct shock wave forms and peak loads during impact. Study exposed multiple limitations in the current FEA model to capture the loading environment in Taylor impact tests and suggests areas of improvement for future research.

Keywords

Taylor impact, Johnson-Cook model, high g loading, nose shape, FEA

Disciplines

Computational Engineering | Engineering | Mechanical Engineering

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Numerical Analysis of Taylor Impact  with Various Nose Shapes

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