SCALING OF LARGE SPACE STRUCTURE JOINTS

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 5703
Amount: $49,949.00
Phase: Phase I
Program: SBIR
Awards Year: 1987
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Csa Engineering Inc
560 San Antonio Rd - Ste 101, Palo Alto, CA, 94306
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 DAVID A KIENHOLZ
 (415) 494-7351
Business Contact
Phone: () -
Research Institution
N/A
Abstract
A PROGRAM IS PROPOSED TO INVESTIGATE METHODS FOR PRODUCING SUBSCALE TRUSS JOINTS WITH STIFFNESS AND DAMPING PROPERTIES SUCH THAT THEY MAINTAIN DYNAMIC SIMILITUDE WITH THEIR FULL-SCALE COUNTERPARTS. THAT IS, THE LOSS FACTORS OF THE MODEL AND PROTOTYPE ARE EQUAL AND THEIR LINEAR STIFFNESS ARE IN THE RATIO R(E)R(L). R(E) AND R(L) ARE RESPECTIVELY THE MODEL-TO-PROTOTYPE RATIOS OF MATERIAL ELASTIC MODULI AND LENGTHS. A DEMONSTRATION EXERCISE WILL BE ATTEMPTED TO SHOW THAT SIMILITUDE CAN BE ACHIEVED FOR A SELECTED JOINT DESIGN BY MEANS WHICH ARE CHEAPER AND MORE PRACTICAL THAN EXACT GEOMETRIC PROPORTIONALITY. STRUCTURAL OPTIMIZATION METHODS AND SOFTWARE WILL BE USED TO DESIGN A SUBSCALE JOINT THAT HAS SPECIFIED PROPERTIES, BUT IS SIMPLER AND CHEAPER IN CONSTRUCTION THAN A MINIATURE REPLICA. STIFFNESS AND LOSS FACTOR WILL BE MEASURED FOR THE FULL-SCALE PROTOTYPE AND SUBSCALE MODEL.

* information listed above is at the time of submission.

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