A STUDY OF BLAST EFFECTS ON POLYUREA COATED STEEL COMPONENTS

Open Access
Author:
Chen, Chien-Chung
Graduate Program:
Civil Engineering
Degree:
Doctor of Philosophy
Document Type:
Dissertation
Date of Defense:
June 09, 2009
Committee Members:
  • Daniel G Linzell, Dissertation Advisor
  • Daniel G Linzell, Committee Chair
  • Andrea J Schokker, Committee Member
  • James Bernhard Anderson, Committee Member
  • Lyle Norman Long, Committee Member
Keywords:
  • steel
  • polyurea
  • High strain rate
  • blast
  • impact
Abstract:
The objectives of this study were to examine the effectiveness of polyurea on blast mitigation and to develop a numerical means to evaluate the structural performance of polyurea coated steel structures under extreme events. Experimental and numerical work was performed to investigate the performance of polyurea coated steel plates under high strain rate loading. The experimental program consisted of mechanical tests that established material properties of steel and polyurea; bond tests that quantified fracture toughness of polyurea bonded steel members; and impact tests that examined dynamic responses of polyurea coated steel plates under high strain rates. The numerical program included development of constitutive models, construction of cohesive models, impact test simulations, and parametric studies that examined effects of polyurea thicknesses, coating locations relative to the charge, and bond strengths between polyurea and steel on the performance of polyurea coated steel plates under blast loading. As a result of this study, a numerical model that can be used to simulate polyurea coated steel structures under impact and blast loading was developed and validated. At the end, implications from experimental and numerical studies and recommendations for future work were discussed.