Failure Analysis of Roller Chain Drives.

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Abstract:

Results from the NAVSEA sponsored task to analyze failures of a roller-chain drive are reported. Several unexpected failures had occurred after relatively short exposure to sea water. This led to an inspection of the broken parts and fracture surfaces in an effort to determine causes of failure. The static breaking strength and fatigue life of the chain were determined by laboratory tests. Both optical and scanning electron micrographs were used in the analysis. Results show tensile overloading to be the principal cause of failure. However stress corrosion cracking may have reduced the useful life of the case hardened roller-chain pins. Modifications to improve the integrity of the system are recommended. Author

Author(s):
Stonesifer, F. R. ; Smith, H. L. ; Meyn, D. A.
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC
Descriptive Note:
Memorandum rept.,
Pagination:
0028

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NRL-MR-4202, SBI-AD-E000 422
Monitor Series:
AD-E000 422
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_6.4.1_Secure Information Exchange; JCA_5.3_Planning; JCA_6.4_Information Assurance; JCA_6_Net Centric
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*FATIGUE LIFE, *TENSILE STRESS, *CHAINS, DRIVES, STRESS CORROSION, SEA WATER CORROSION
Field(s)/Group(s):
Marine Engineering, Mechanics
Keyword(s):
Roller chain, LPN NRL M001 X 0
Report Date:
1980 Apr 04