Title

Investigation Of High Speed Impact Behavior Of Fibrous Materials. Part I. Design And Apparatus

Description

A high speed impact test machine has been designed, constructed, and calibrated to test parachute components at high rates of loading. This instrument is capable of rupturing materials of up to 10,000 pounds static breaking strength at velocities of from 200 to 750 feet per second. The impacting force is applied by a free flying missile launched by a gas gun utilizing either nitrogen or helium gas at moderately low pressures. The gun has a bore of 2.5 inches and fires missiles weighing up to 10 pounds.

Pertinent data are obtained by means of multiple exposure photography using a multi-flash lighting source which provides a maximum of fifteen separate flashes spaced at predetermined intervals of between 10 and 10,000 microseconds. The resulting photograph records the specimen and the impacting missile before, during and after the impact. Measurement of the distances between successive exposures yields information such as the breaking strength, the extension to rupture, and the energy absorbed by the specimen.

Date

1960

Index Abstract

Contrails and DTIC condensed

Photo Quality

Complete

Report Number

WADD TR 60-511 Part I

Creator

Chu, Chauncey C.

Morgan, Henry M.

Coskren, Robert J.

Corporate Author

Fabric Research Laboratories, Inc.

Laboratory

Materials Central

Extent

39

PB Number

PB171311

Identifier

AD0247493

AD0247493

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-6321

DoD Project

7320

DoD Task

73201

DTIC Record Exists

No

Distribution Change Authority Correspondence

ASD, USAF LTR

Distribution Conflict

No

Date Modified

Scanned by request 11/14/2013 submitted by the National Aeronautics and Space Administration (NASA) (Government Agency - Domestic)

Abstract

A high speed impact test machine has been designed, constructed, and calibrated to test parachute components at high rates of loading. This instrument is capable of rupturing materials of up to 10,000 pounds static breaking strength at velocities of from 200 to 750 feet per second. The impacting force is applied by a free flying missile launched by a gas gun utilizing either nitrogen or helium gas at moderately low pressures. The gun has a bore of 2.5 inches and fires missiles weighing up to 10 pounds.

Pertinent data are obtained by means of multiple exposure photography using a multi-flash lighting source which provides a maximum of fifteen separate flashes spaced at predetermined intervals of between 10 and 10,000 microseconds. The resulting photograph records the specimen and the impacting missile before, during and after the impact. Measurement of the distances between successive exposures yields information such as the breaking strength, the extension to rupture, and the energy absorbed by the specimen.

Report Availability

Full text available

Date Issued

1960-09

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource

Subject

Impact Shock

Parachute Fabrics

Parachutes

Test Facilities

Guided Missiles

High Speed Photography

Nose Cones

Recovery

Stresses

Publisher

Wright-Patterson Air Force Base, OH : Wright Air Development Division, Air Research and Development Command, United States Air Force