Accession Number : AD0465107


Title :   INVESTIGATION OF THE HIGH SPEED IMPACT BEHAVIOR OF FIBROUS MATERIALS PART II. IMPACT CHARACTERISTICS OF PARACHUTE MATERIALS.


Descriptive Note : Technical rept. Nov 60-Dec 61,


Corporate Author : FABRIC RESEARCH LABS INC BOSTON MA


Personal Author(s) : Coskren, Robert J ; Chu, Chauncey C


Report Date : Feb 1962


Pagination or Media Count : 108


Abstract : A technique was developed which effectively characterizes the impact behavior of high strength parachute components. The present equipment makes possible a measure of force and extension buildup in a webbing during impact; however, further refinements in the test equipment were required in order to make precision measurement practical. One such modification is the use of high-speed motion pictures rather than multiple-exposure stills to observe the event. A good representation of impact performance is through energy absorption capability. Results show that slow-speed (Instron) tensile behavior is not always indicative of impact response. The nylon overlap splices were found to be more efficient than the other nylon joints as regards impact behavior. (Author, modified-PL).


Descriptors :   *PARACHUTE FABRICS , IMPACT SHOCK , PARACHUTES , MANUFACTURING , LOADS(FORCES) , RUPTURE , ENERGY , STRESSES , TEXTILES , HIGH SPEED PHOTOGRAPHY , LIGHT GAS GUNS , TRIGGER CIRCUITS , INFRARED PHOTOELECTRIC CELLS , FORCE(MECHANICS) , NYLON , JOINTS , VELOCITY , HIGH ALTITUDE , WEIGHT , TEST EQUIPMENT , SHOCK RESISTANCE , PRESSURE , TIME , TENSILE PROPERTIES , STRAIN(MECHANICS) , SAFETY BELTS , STRUCTURAL PROPERTIES


Distribution Statement : APPROVED FOR PUBLIC RELEASE