Abstract
The casting constraint for topology optimization with both-sided casting is discussed. Combining the relaxed one-sided casting constraint on a non-orthogonal grid and the automatic estimation of the separation plane by the power of gravity center, a method to realize both-sided casting without specifying the separation plane by the user is developed. Good one-sided casting performance was confirmed by using a cone-shaped exploration range for the downstream element. In addition, using the p-norm gravity center on the casting axis, the separation surface was set on the expected density ridge, and a good both-sided casting constraint was achieved. The directional dependence of the rigidity of the 3D cantilever beam and decelerator mount bracket are investigated by optimizing several casting directions. The peak stiffness increased in directions other than the orthogonal directions, such as straight front and side.
