Analysis on Common Manufacturing Defects and Related Issues of Lattice Structures in 3D Printing
DOI:
https://doi.org/10.54097/cb9ff080Keywords:
Additive manufacturing, lattice structures, manufacturing defects, porosity, lack of fusion, dimensional accuracyAbstract
Lattice structures have been used to construct some of the light-weight, high-surface-area and mechanically-adaptable parts of additive manufacturing. However, the complex shape of these parts is also more prone to manufacturing defects such as porosity, lack of fusion, dimensional deviation, strut waviness, surface roughness and poor interlayer bonding. This paper introduces the main kinds of defects in 3D-printed lattice structures and analyzes the problems they cause to the mechanical properties, fatigue life and design reliability of such structures. Many of the lattice failures have been caused by the combined effect of geometry, process parameters and material behaviour during printing, not by design problems alone. According to the latest research on defect characterization, numerical modelling and machine learning for defect reduction have been applied to pinpointing frequent production problems and their expanded influence on quality control and structural performance. Therefore, to obtain defect-free lattice structures, integrated control at all stages of design, process supervision and post-processing is needed, and a single solution is insufficient.
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