A Low Cost Shadow Moire Device for the Nondestructive Evaluation of Impact Damage in Composite Laminates

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Abstract:

Studies conducted under this Independent Exploratory Development IED project have concentrated on developing a field inspection instrument for the detection of low-velocity impact damage and delaminations in laminated composites and honeycomb sandwich structures. A low cost, hand-held battery- powered damage detector has been developed which can be operated under field conditions. This device can be used to detect minute surface perturbations resulting from foreign object impact that can cause disbond andor delamination in aircraft structures. Since the operation of the device is simple and its detecting capability is not affected by temperature, humidity or vibration, it can be used under field operational conditions with minimum training. The entire detector system, including the power pack, weighs less than 3.5 lbs. Keywords Shadow moire, Impact damage, delaminations, Composite structures, Nondestructive testing, IED, Optics, Interferometry, Shadow moire out-of-plane interferometric SMOOPI damage detector.

Author(s):
Scotese, Arthur E.
Author Organization(s):
NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE AND CREW SYSTEMS TECHNOLOGY DEPT
Descriptive Note:
Final rept. Oct 1987-Sep 1988
Pagination:
0063

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NADC-90011-60
Task Number(s):
R36200000
Project Number(s):
R3620
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_5.3.3_Develop Strategy; JCA_5.3.4_Develop Courses of Action; JCA_5.3.5_Analyze Courses of Action; JCA_4.3_Maintain
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*NONDESTRUCTIVE TESTING, *DAMAGE, *DETECTORS, *LAMINATES, *COMPOSITE MATERIALS, *LOW COSTS, COMPOSITE STRUCTURES, SURFACES, LOW VELOCITY, INTERFEROMETRY, ENERGY CONVERSION, INSPECTION, AIRFRAMES, POWER SUPPLIES, INSTRUMENTATION, PERTURBATIONS, HAND HELD, HUMIDITY, FIELD CONDITIONS, SANDWICH CONSTRUCTION, HONEYCOMB STRUCTURES, IMPACT, FOREIGN, AIRCRAFT, DETECTION, ELECTRIC BATTERIES, OPTICS, VIBRATION
Field(s)/Group(s):
Laminates and Composite Materials, Optics
Keyword(s):
PE62936N, WUED801, SHADOW MOIRE OUT OF PLANE INTERFEROMETRIC(SMOOPI), DAMAGE DETECTOR, IED
Report Date:
1990 Mar 01