True Load-Deformation Relationships for Coated and Uncoated Fabrics.
Final rept. Feb 77-Sep 78,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Pagination or Media Count:
A baseline survey was prepared on the application of fabrics in civil engineering with an emphasis on the testing techniques by which physical and mechanical properties of fabrics andor membranes are determined. It was found that several characteristics are required to fully evaluate a fabrics potential for use in civil engineering construction. Standard test methods used with fabrics are not always adequate for this evaluation, and new tests are being developed to evaluate fabrics under various specific conditions. These tests should be simple to perform, provide useful information, and be accepted as reasonable by both manufacturer and user. Both new test methods developed by other researchers and test methods presently being used for evaluating fabrics andor membranes are discussed. Several selected load versus elognation test methods were evaluated in the laboratory. For this evaluation, 10 fabric materials were selected. An attempt was made to select fabrics with a range of physical properties that would enable a better evaluation of the test methods. The Capstan linear variable differential transformer LVDT test, a unidirectional test method designed to accurately describe the load versus elongation relationships of both low and high-strength fabrics andor membranes, was devised. The results of the evaluation indicated that the Capstan test gives representative load versus elongation data for woven fabrics.
- Test Facilities, Equipment and Methods