Intro

1
Introduction
Applications
Advantages
Future Work
Progress
Development of Blast Resistant Discrete-Pin Core
Sandwich Panels
Ben Langhorst
2
Sandwich Panels
Future Work
Introduction
Applications
Advantages
Progress
Foamed Aluminum Core
These all have limitations that are addressed by
introducing discrete pins to the core
Pyramidal Core
3
Discrete-Pin Core Possibilities
Introduction
Applications
Advantages
Future Work
Progress
Hollow Pins
Angled and Vertical Pins
Different Angles in Different Directions
4
Introduction
Applications
Advantages
Future Work
Progress
5
Enhanced Performance
Introduction
Applications
Advantages
Future Work
Progress

• Independent core geometric variables
• Pin angle and spacing are not linked
• Variable core geometry throughout panel

6
Enhanced Performance
Introduction
Applications
Advantages
Future Work
Progress

• Different geometry for different loading zones
• Customizable core means no dead weight
• Panels may be designed so that all pins are being
  stressed equally and optimally

Biological examples of selective strengthening
7
Introduction
Applications
Advantages
Future Work
Progress

• Simulated Pseudo-Static Compression and
• Bending Tests

8
Future Work
Introduction
Applications
Advantages
Progress
Mixed Vertical and Angled Pins
Hollow Pins
Variable Pin Spacing
9
Future Work
Introduction
Applications
Advantages
Progress
Project Goals

• Fabricate panels featuring a variety of novel
  cores
• Demonstrate superior performance of same-density
  panels subjected to compression, shear, bending
• Examine deformation and failure mechanisms and
  establish design method to make optimal panels
• Simulate blasts with ABAQUS Finite Element
  Software
• Physical blast testing (foam projectile) for
  validation

10
Acknowledgements
Introduction
Applications
Advantages
Future Work
Progress

• U.S. Department of Homeland Security Scholarship
  and Fellowship Program
• National Science Foundation STTR Program STTR
  Phase I Advanced Materials for Blast and
  Ballistic Protection.
• Prof. Daniel R. Mumm, Assistant Professor,
  Chemical Engineering and Materials Science,
  University of California, Irvine

11
Future Work
Introduction
Applications
Advantages
Progress
12
Future Work
Introduction
Applications
Advantages
Progress
13
More Economical
Introduction
Applications
Advantages
Future Work
Progress

• Very little wasted material
• No Initial plastic deformation

Problems with Existing Pin-core manufacturing
techniques
Initial bending inherent weakness
Cutouts wasted material
14
Future Work
Introduction
Applications
Advantages
Progress

• Fabricate
• Various panels featuring novel cores
• Double-curvature panels
• Demonstrate concepts and feasibility

• Demonstrate
• Superior performance of same-density panels
• Subjected to pseudo-static bending and
  compression loading

• Test and Implement
• Simulate blasts with ABAQUS Finite Element
  Software
• Physical blast testing
• (foam projectile) for
• validation

• Design
• Examine deformation and failure mechanisms
• Establish design method to make optimal panels