Composite materials due to high mechanical resistance relative to their weight, as well as high strength and better chemical resistivity, have been increasingly replaced by metals and alloys. Effective performance of composite materials would be reveled at high temperature regions in aerospace applications. Moreover, they have lots of applications in construction of buildings and bridges. Temperature difference between day and night causes thermal stress within these structures and affects their mechanical properties. For this reason, a structure is required which can repel thermal stresses as possible as to maintain mechanical properties together with providing low production and execution costs. In this study, it has been addressed to investigate thermal shocks on glass-polyester composite used for aerospace application. In this project, three production variables and one laboratory factor were considered. The production variables were included as (1) reinforcement type which is kashida; TEXT-ALIGN: justify; TEXT-KASHIDA: 0%; MARGIN: 0in 0in 0pt; unicode-bidi: embed; DIRECTION: ltr" Keywords: Textile Composite, Thermal shock, Glass fiber, Polyester resin, Theory of Bicomponent fibers, textile and Impact resistance