• Gaurav Vyas

In space applications, the space vehicles encounters cryogenic environment. In this present research, liquid nitrogen (LN2) is used for the purpose of testing of the composite material used in aircraft application at the cryogenic temperature. A double walled rectangular chamber using 2mm thick stainless steel sheet (SS316LN) is used for the purpose of testing of composite materials physical properties under cryogenic. The gap between the two walls of the chamber is 7mm and it is uniform throughout its surface. The vacuum pressure of 10−3 mbar is maintained inside the gap between two walls so as to keep the composite material inside the chamber free from the external environment and also reduces the heat transfer rate. For maintaining vacuum, a vacuum pump which is attached to the outer wall of the chamber. In addition, a Dewar containing liquid nitrogen is attached, to supply LN2 to the cryogenic chamber. Thermocouples are attached to the chamber to measure the temperature inside the chamber and a camera to keep watching the activities or process happening inside the chamber during the test. After the assembly of all the components such as chamber, pump, Dewar, camera and thermocouple, the setup is attached to the universal testing machine (UTM). Later, the strength of the composite material used for preparing the chamber is analyzed using tensile testing on that material by spraying liquid nitrogen on it.

Space applications, cryogenic chamber, liquid nitrogen, universal testing machine (UTM), thermocouples, data acquisition system (DAQ)

" Fabrication of cryogenic chamber for the UTM testing of composite material used for space applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.158-163, December 2018, Available :http://www.jetir.org/papers/JETIREC06016.pdf

" Fabrication of cryogenic chamber for the UTM testing of composite material used for space applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp158-163, December 2018, Available at : http://www.jetir.org/papers/JETIREC06016.pdf