Lightweight Design of Squeeze Cast Steering Knuckle Based on Topology Optimization
To achieve lightweight design of vehicle body,an aluminum alloy steering knuckle solid model was estab-lished.The SIMP interpolation model was utilized for multi-operating condition topology optimization,and the struc-tural optimization was accomplished by considering forming requirements of squeeze casting.The results indicate that the maximum stress suffered by aluminum alloy steering knuckle under various operating conditions is significantly lower than yield limit,resulting in a weight reduction of 60.9%compared to the ductile cast iron steering knuckle.After T6 heat treatment,the aluminum alloy steering knuckle exhibits an average tensile strength of 311.03 MPa,yield strength of 252.13 MPa,and elongation of 7.45%,which surpass the specified values,meeting performance requirements.
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