Analysis of failed Sach foot adapter and Socket adapter

Venkataswamy, MA and Sujata, M and Keshab, Barai and Bhaskaran, TA and Bhaumik, SK (2003) Analysis of failed Sach foot adapter and Socket adapter. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

A failed SACH foot adapter and an unused socket adapter were forwarded to the laboratory for analysis. Examination revealed that the SACH foot adapter bolt had failed in the threaded region by fatigue. The failure on the flange region was by overload. No metallurgical abnormalities were observed at the fatigue crack origins. The fatigue appears to be stress related. It appears most probable that the assembly stresses caused due to improper tightening and/or fixing of the adapter led to fatigue crack initiation. Semi-quantitative chemical analysis of the socket adapter by EDX revealed that the material of the adapter corresponds to stainless steel of specification CA-6NM.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Sach foot adapter;socket adapter;artificial limbs;fatigue;stainless steel
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 05 Aug 2011 13:32
Last Modified: 05 Aug 2011 13:32
URI: http://nal-ir.nal.res.in/id/eprint/9813

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