What is it about?
Thermal autofrettage is a process of strengthening the thick-walled cylinders by producing a thermal gradient. In this work, it is shown experimentally that thermal gradients can produce the compressive residual stresses on the inner surface of the cylinder. These compressive stresses enhances the pressure carrying capacity and fatigue strength.
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Why is it important?
Right now most autofrettage is achieved by hydraulic pressure or mechanical means. Compared to those, the thermal autofrettage is simple and economical. Moreover, it also helps in the situation in which cylinder encounters thermal gradient during operation.
Perspectives
In my opinion, it is quite innovative work. It can be easily adopted by industries.
Dr Uday Shanker Dixit
Indian Institte of Technology Guwahati
Read the Original
This page is a summary of: Experimental assessment of residual stresses induced by the thermal autofrettage of thick-walled cylinders, The Journal of Strain Analysis for Engineering Design, December 2015, SAGE Publications,
DOI: 10.1177/0309324715616005.
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