Effects of Surface Flaws on Impact Resistance of Uncoated Polycarbonate

reportActive / Technical Report | Accession Number: ADA141364 | Open PDF

Abstract:

Uncoated aircraft transparency polycarbonate is highly susceptible to surface abrasions. This report describes an experimental effort of limited scope to determine the effects of flaws on the resistance of polycarbonate to the impulsed, high energy loading conditions of bird impact. Test fixturing for flaw formation and high rate load application to polycarbonate beam specimens is described. It is demonstrated that polycarbonate is sensitive to changes in scratch profile and is less sensitive to changes in scratch depth. Net absorbed energy decreases with increasing scratch depth. However, scratches of any depth produce fracture if the scratch has a sharp, V-shaped profile.

Author(s):
Bouchard, Michael P.
Author Organization(s):
DAYTON UNIV OH RESEARCH INST
Descriptive Note:
Interim technical rept. Jun-Jul 1981
Pagination:
0023

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):
UDR-TR-82-74, AFWAL-TR-84-3016
Contract/Grant Number(s):
F33615-80-C-3401
Project Number(s):
1926
Monitor Series:
TR-84-3016, AFWAL
 Subject Terms
Joint Capability Areas:
JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_1.2.3_Educating; JCA_6.4.1_Secure Information Exchange; JCA_6_Net Centric; JCA_5_Command and Control; JCA_6.4_Information Assurance
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*IMPACT STRENGTH, *DEFECTS(MATERIALS), *POLYCARBONATES, BEAMS(STRUCTURAL), TEST METHODS, BENDING, DEPTH, FRACTURE(MECHANICS), SURFACES, TENSION, BIRD STRIKES, AIRCRAFT EQUIPMENT, TRANSPARENCIES, IMPULSE LOADING, RESISTANCE, ABRASION, HIGH RATE, IMPACT
Field(s)/Group(s):
Plastics, Mechanics
Keyword(s):
PE64212F
Report Date:
1984 Mar 01