Multi-material topology optimization considering interface behavior via XFEM and level set method

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Level set topology optimization of structural problems with interface cohesion (2017, methodology): “[17] recently leveraged the XFEM-LSM framework to minimize the compliance of multi-material structures with interface cohesion.”
Current and future trends in topology optimization for additive manufacturing (2018, background): “On the other hand, it is still an issue to improve the numerical analysis accuracy around the interface areas [157] and reflect the actual behavior of printed materials [158,159].”
A new multi-material level set topology optimization method with the length scale control capability (2018, unknown): “Recently, the continuous material property transition at the material/material interface was considered by Vermaak et al. [27] and the cohesive model was addressed by Liu et al. [28].”
Design of graded lattice structure with optimized mesostructures for additive manufacturing (2018, background): “Some other further works will be carried out to optimize the GMs composed of multiple materials in consideration of interface behavior for AM [46].”