Abstract
A model for calculating the evolution of temperature and thermal stresses within a single metallic layer formed on the powder bed using different scanning patterns in selective laser sintering (SLS) was proposed. The model allows for the non-linear behavior of thermal conductivity, specific heat, and elastic modulus due to temperature changes and plastic deformation capabilities with a bilinear isotropic hardening behavior. The effect of laser scanning patterns on temperature, residual thermal stresses and distortion were investigated. It was shown that the distortion and transient stresses of a layer processed by a moving laser beam is decreased with fractal scanning pattern.
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Ma, L., Bin, H. Temperature and stress analysis and simulation in fractal scanning-based laser sintering. Int J Adv Manuf Technol 34, 898–903 (2007). https://doi.org/10.1007/s00170-006-0665-5
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DOI: https://doi.org/10.1007/s00170-006-0665-5