Dynamic Test System with Direct Impact and Split Hopkinson Pressure Bar Modules for Advanced Material Characterization

Abstract

The main objectives of this proposal were to predict the damage accumulation and failure mechanism associated with high strain impacts in 1) additively manufactured specimens as well as 2) additively manufactured lattice structures. The main aim of the first research was to characterize the plastic behavior, and as a result, microstructure changes of AM Inconel 718 under different deformation conditions (stress states, strain rates, and temperatures) using split Hopkinson pressure bar (SHPB) tests, and quantify the influence of thermal post-processes on its plastic behavior and microstructure. The second research focused on the design, topology optimization, and characterization of quasi-static and in particular, dynamic load-deformation behaviour of additively manufactured metal structures. The energy absorption behavior, failure modes, localization of deformation, and densification of these lattice structures under quasi-static and dynamic loading conditions were studied.

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Document Details

Document Type
Technical Report
Publication Date
Feb 02, 2021
Accession Number
AD1198699

Entities

People

  • Keivan Davami
  • Nicholas Brake
  • Xuejun Fan

Organizations

  • Lamar University

Tags

DTIC Thesaurus Topics

  • Additive Manufacturing
  • Advanced Materials
  • Air Force
  • Civil Engineering
  • Constitutive Equations
  • Dynamic Tests
  • Engineering
  • Failure Mode And Effect Analysis
  • Materials
  • Mechanical Properties
  • Microstructure
  • Strain Hardening
  • Strain Rate
  • Students
  • Teamwork
  • Technology Transfer
  • Topology Optimization

Fields of Study

  • Materials science

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Mechanical Engineering/Mechanics of Materials.
  • Research Science/Academic Research