Affiliation:
1. VSSC
2. Vikram Sarabhai Space Centre
Abstract
Gimbaling the engine nozzle within a specified angle through hydraulic actuator modules is commonly used to control the trajectory path of satellite launch vehicles. During one of the hot test of a liquid engine stage, a drop in system pressure in actuator module was noticed due to cracking of case drain plumbing inside the ferrule. The tensile and fatigue (axial and bending) test of the tube material was carried out to understand the cause of failure, simulating the actual service conditions such as strength and bending moment in assembled tube. Findings of the metallurgical investigation along with the fatigue test results were presented in this paper.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference3 articles.
1. Abhay K. Jha, M. Swathi kiranmayee, Sushant K. Manwatkar, Metallurgical investigation of cracked stainless steel tubes used in engine gimbal control system of satellite launch vehicle. Engineering failure analysis, Vol. 27 (2013) 225-231.
2. ASTM E 8M, Standard Test Methods for Tension Testing of Metallic Materials [Metric], Annual book of ASTM standards, Vol. 3. 01 (2011).
3. ASTM E 466, Standard practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials, Annual book of ASTM standards, Vol. 3. 01 (2011).
Cited by
1 articles.
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