irreversible effects of this type of energy on the environment has caused researchers to pay more attention to renewable energy. The wind energy as a cheap and always available energy more than other renewable energy sources has attracted the attention of scientists. The horizontal axis wind turbines have caused large-scale plants to be built. Identifying critical condition in the creation of blade failure due to the high cost of design, construction and maintenance of horizontal axis wind turbines is necessary. In previous years the primary methods to simulate wind flow and estimate the aerodynamic forces acting on the blade was used. The nature of turbulent flow: boundary layer flow over complex geometry of the blade, the interaction of wind flow and blade surfaces, causing a more accurate method to calculate the aerodynamic forces. Fluid – Structure Interaction (FSI) simulations predict the behavior of structures and fluid and their effects on each other. The aim of this study is to evaluate the stress caused by the wind flow around the blade with FSI model. For this purpose, the geometry of the blade and its layered composite is determined by using ANSYS ACP. Then wind flow around the blade by choosing the appropriate mesh network and turbulent model in ANSYS CFX is simulated. The pressure caused by the wind flow on the blade for different wind speeds, by analysis of wind flow around the blade is obtained. With the help of FSI capabilities in ANSYS Workbench, the obtained pressure from CFD analysis of fluid as pressure forces is applied to Static Structure environment of ANSYS Workbench software. Stress field and deflection along the blade are calculated from the static analysis of blade. The results show in the high speed of wind flow by transferring the maximum pressure from the leading edge toward the center of blade, Stress along the blade suddenly increase. Keywords: horizontal axis wind turbines blade, Fluid – structure interaction, ANSYS