摘要
Through a modified inherent strain model based on the minimum residual stress and deformation,three building schemes with different building postures and support structures were evaluated by finite element analysis.Results demonstrate that according to the principle of reducing the overall height of the building and reducing the support structure with a large tilt angle from the building direction,the residual stress and deformation can be effectively reduced by proper design of building posture and support before laser powder bed melting.Moreover,without the data of thermophysical property variation of Ti-6Al-4V artificial knee implants with temperature,predicting the residual stress and deformation with acceptable accuracy and reduced time cost can be achieved by the inherent strain model.
采用基于最小残余应力和变形的修正固有应变模型,对具有不同打印建造姿态和支撑结构的3种打印建造方案进行了有限元分析。结果表明,以降低打印建造整体高度和减少与打印建造方向倾斜角较大的支撑结构为准则,在进行激光粉末床熔融前进行适当的打印建造姿态和支撑设计,可以有效地减小残余应力和变形。此外,在不知道Ti-6Al-4V人工膝关节热物性随温度变化的情况下,利用固有应变模型预测其残余应力和变形,可以获得较好的精度并节约时间成本。
出处
《稀有金属材料与工程》
北大核心
2025年第6期1417-1425,共9页
Rare Metal Materials and Engineering
基金
Natural Science Foundation of Shandong Province(ZR2020ME020)。
