Objective This study reveals steady flow characteristics in rigid asymmetrical AAA models. Methods Three-dimensional symmetrical models are used to numerically simulate the steady flow in the AAA models. Results The results show that the main vortex are found in the x-z plane and two pairs of symmetrical vortices are found in the cross-section plane. Regions of high wall shear stress were observed at the distal end of the aneurysm and the wall shear stresses change dramatically at the same place, especially the z component.Conclusion The distal end of the aneurysm becomes thus the most vulnerable region in the rupture of the aneurysm.