Shock Wave Propagation in Cementitious Materials at Micro/Meso Scales

Abstract

Shock wave response of heterogeneous materials like cement and concrete is greatly influenced by the constituents and their statistical distributions. The microstructure of cement is complex due to the presence of unhydrated water, nano/micro pores, and other hydrated and unhydrated products, such as the C-S-H gel, tri-calcium silicate, di-calcium silicate etc. The evolved microstructures at different degrees of hydration are captured using a suite of software that explicitly modeled the chemical compositions of various constituents and their byproducts for a water/cement ratio of 0.4. An evolved microstructure of 50x50x50 micron3 volume of Portland cement product was modeled as a representative volume element (RVE) through a general purpose finite element code, ABAQUS . The heterogeneity induced shock decay phenomenon under compression in this 50-micron size cube due to an OFHC Copper flyer plate impact is analyzed.

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Document Details

Document Type
Technical Report
Publication Date
Aug 31, 2015
Accession Number
ADA624827

Entities

People

  • A. M. Rajendran
  • Matthew Nelms
  • Ram Mohan
  • W. Hodo

Organizations

  • North Carolina Agricultural and Technical State University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Computer Simulations
  • Concrete
  • Data Analysis
  • Elastic Properties
  • Elements
  • Engineering
  • Experimental Data
  • Hydration
  • Materials
  • Microstructure
  • Molecular Dynamics
  • Portland Cement
  • Shock Waves
  • Simulations
  • Three Dimensional
  • Wave Propagation

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Fluid Dynamics (CFD)
  • Pavement Materials Engineering.