摘要
目的提高预测的精确度和可靠性,以克服激光粉末床熔融技术(LPBF)在制造大尺寸且几何形状复杂的部件(例如钛合金髋关节)时面临的残余应力与变形预测不准确的问题。方法提出建立激光扫描矢量集的方案,该方案通过预设的顺序逐一激活各个激光扫描矢量集,以更精确地模拟真实的激光扫描过程。这种方法能够更全面地考虑激光扫描策略对残余应力和变形的影响,从而提高大尺寸部件预测的准确度。结果考虑扫描策略(采用激光扫描矢量集)的模拟方案的误差低于10%,而忽略扫描策略的方案的误差则高达27%。这一结果表明,通过在预测模型中引入激光扫描矢量集,可以大幅提升对LPBF制造的钛合金髋关节在残余应力与变形方面的预测准确度。结论提出的建立激光扫描矢量集的方案在解决LPBF制备大尺寸部件时的残余应力与变形预测难题方面取得了显著成效。该方法不仅提高了预测的准确度,还为LPBF技术在个性化定制金属骨科植入物生产中的广泛应用提供了有力支持。
The work aims to enhance prediction accuracy and reliability so as to address the inaccuracy in predicting residu-al stresses and deformations during the manufacture of large-scale and geometrically complex components(such as titanium al-loy hip joints)using Laser Powder Bed Fusion(LPBF)technology.In this study,a scheme for establishing a set of laser scan-ning vectors was proposed,which sequentially activated each vector set in a preset order to more precisely approximate the ac-tual laser scanning process.This method comprehensively considered the impact of laser scanning strategies on residual stresses and deformations,thereby improving prediction accuracy for large-scale components.The simulation scheme considering scan-ning strategies(employing the laser scanning vector set)exhibited an error below 10%,while the model ignoring scanning strategies had an error as high as 27%.This result suggested that considering scanning strategies by establishing a laser scanning vector set significantly improved the prediction accuracy of residual stresses and deformations in titanium alloy hip joints man-ufactured by LPBF.The proposed scheme for establishing a laser scanning vector set has achieved notable success in solving the prediction challenges of residual stresses and deformations in large-scale components prepared by LPBF.This method not only enhances prediction accuracy but also provides strong support for the widespread application of LPBF technology in the produc-tion of customized metal orthopedic implants.
作者
赵伟鸿
王炳玉
李昊卿
ZHAO Weihong;WANG Bingyu;LI Haoqing(Yantai Vocational College of Culture and Tourism,Shandong Yantai 264003,China;School of Transportation,Ludong University,Shandong Yantai 264025,China)
出处
《精密成形工程》
北大核心
2025年第9期95-102,共8页
Journal of Netshape Forming Engineering
基金
山东省自然科学基金(ZR2024QE380)。
关键词
激光粉末床熔融技术
钛合金髋关节
残余应力
变形
热力耦合分析
laser powder bed fusion
titanium alloy hip joints
residual stress
deformation
thermal-mechanical coupling analysis
