Double Lap Shear Testing of Coating Modified Ice Adhesion to Liquid Oxygen Food Line Bracket, Space Shuttle External Tank

The brackets that secure the liquid oxygen feed line to the external tank are known locations of frost and ice growth during the period following fuel loading. This experiment quantified the reduced adhesion when ice phobic coating were applied to test coupons simulating the bracket surface. Double...

Full description

Saved in:
Bibliographic Details
Main Authors: Ferrick, M G, Mulherin, N D, Haehnel, R B, Coutermarsh, B A, Durell, G D, Tantillo, T J, St Clair, T L, Welser, E S, Cano, R J, Smith, T M, Martinez, E C
Format: Report
Language:English
Subjects:
ADHESION
ALUMINUM
COATINGS
CONSISTENCY
Containers and Packaging
EXTERNAL STORES
FEEDING
FROST
ICE
ICE FORMATION
Inorganic Chemistry
LIQUID OXYGEN
MOUNTING BRACKETS
PATTERNS
POSITION(LOCATION)
PROTOTYPES
RANGE(EXTREMES)
REDUCTION
SHEAR TESTS
Snow, Ice and Permafrost
SPACE SHUTTLES
TANKS(CONTAINERS)
TEMPERATURE
TEMPERATURE CONTROL
TEST AND EVALUATION
Test Facilities, Equipment and Methods
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The brackets that secure the liquid oxygen feed line to the external tank are known locations of frost and ice growth during the period following fuel loading. This experiment quantified the reduced adhesion when ice phobic coating were applied to test coupons simulating the bracket surface. Double lap shear testing of coated and uncoated coupons provided robust test specimens and consistent load response patterns with exceptional resolution. For these tests ice was grown as strong and consistently as possible, subject to temperature decreases comparable to those of the prototype bracket, and tested at a controlled temperature of -112 degrees C. The tests evolved in three phases, with uncoated controls included in each group of tested samples. The first phase of testing evaluated a wide range of coatings, and showed that Rain-X mixed with MP-55 powdered Teflon (RXM) was outstanding coating to reduce ice adhesion to Koropon coated aluminum. The original document contains color images.