February 2005

1
Lightweight Modular Causeway Section (LMCS) RD
Study
LMCS Tube Stiffened Design Concept
February 2005
2
Lightweight Modular Causeway Section (LMCS) RD
Study
Full-scale LMCS Module
10-ft
18-in
6-ft
5-ft
25-ft
February 2005
3
Lightweight Modular Causeway Section (LMCS) RD
Study
Full-scale LMCS Module
10-ft
6-ft (nom)
LMCS - Hard Structure Deployed
40-ft
February 2005
4
Lightweight Modular Causeway Section (LMCS) RD
Study
1/3rd Scale LMCS Model Design Development
Molded lower beam
Primary Structure Extruded aluminum
beams 3-in x 1-in x 1/8-in wall 1/8-in thick
plate reinforcement Aluminum top and bottom skin
February 2005
5
Lightweight Modular Causeway Section (LMCS) RD
Study
1/3rd Scale LMCS Model Design Development
Shear Connectors
Fabrication 3M
Aluminum-to-aluminum tape Stainless steel rivets
(anti-peel) End plates bolted to primary
structure Closed cell foam-filled cavities
February 2005
6
Lightweight Modular Causeway Section (LMCS) RD
Study
1/3rd Scale LMCS Model Design Development
Special Fabrication Molded
lower beam hydraulic - custom built press.
February 2005
7
Lightweight Modular Causeway Section (LMCS) RD
Study
1/3rd Scale LMCS Model Design Development
Removable top deck surface - plywood with
elastomer coated anti-slip surface
February 2005
8
Lightweight Modular Causeway Section (LMCS) RD
Study
Air Containment Development
Tough exoskeleton of woven polyester webbing
Inner shell of elastomer coated fabric
Primary air containment bladder
February 2005
9
Lightweight Modular Causeway Section (LMCS) RD
Study
Buoyancy Selection Considerations
February 2005
10
Lightweight Modular Causeway Section (LMCS) RD
Study
Lightweight Urethane Inner Bladders
5-ft (Nom Dia)
25-ft
10-ft
February 2005
11
Lightweight Modular Causeway Section (LMCS) RD
Study
Heavy-duty PVC shell encased within woven
polyester webbing matrix
February 2005
12
Lightweight Modular Causeway Section (LMCS) RD
Study
Heavy-duty PVC shell encased within woven
polyester webbing matrix
Example of LMCS type buoyancy structure
Rapidly Installed Breakwater (RIB) 6-ft dia
technology demonstrator
February 2005
13
Lightweight Modular Causeway Section (LMCS) RD
Study
1/3rd Scale LMCS Model Design Development
Webbing Matrix Design Development

• Conducted review of available off-the-shelf
  webbing suitable for 1/3rd scale model.
• Designed and fabricated 1/3rd scale webbing
  matrix lay-up tooling

Nylon webbing T7939 Breaking Strength 3,000 lbs
February 2005
14
Lightweight Modular Causeway Section (LMCS) RD
Study
Secondary Bladders (stowed)
Inflation SystemDamage Containment
Primary Bladders
Secondary Bladder Inflates
Primary Bladder Failure
Secondary Bladder Fully Inflated
February 2005
15
Lightweight Modular Causeway Section (LMCS) RD
Study
Small Scale Damage Containment Demonstration
February 2005
16
Lightweight Modular Causeway Section (LMCS) RD
Study
Small Scale Damage Containment Demonstration
February 2005
17
Lightweight Modular Causeway Section (LMCS) RD
Study
?
Questions
February 2005