Three dimensional analysis of thermal stresses and strains in composite exhaust tube model at different salt concentration ratios

الملخص EN

The study investigates effect of salt ratio on the thermal stress and strain concentration in composite exhaust tube model.

The study builds three-dimensional model of exhaust tube and analyses it numerically with finite element method using ANSYS Software.

The investigation depends on the experimental results of tensile test and thermal conductivity test to determine the mechanical and thermal properties of composite specimens.

The composite specimens were immersed in the salt environment of different concentration ratios (15 %, 35 %, and 55 %) for forty days.

The numerical results show that the thermal stresses (σRxR, σRy R and σRzR) at node number (2873) increases by ratio of (58.2 %) while the thermal shear stress (τRxyR) at node number (20600) increases by approximate ratio of (56.17 %) as a result of increase in the salt concentration ratio from (15 %) to (55 %).

The maximum thermal shear strain (γRxyR) increases with ratio of (21.8 %) due to increase in the salt concentration ratio from (15 %) to (55 %).

The maximum thermal stresses and strains concentrate at the end of composite exhaust tube model as a result of expansion which happened in the tube model.

The temperature distribution and heat transition with time is described in three dimensional composite exhaust tube model.

The theoretical and numerical results are compared, and the disparity between them is equal to (9 %).