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<p>One of the challenges of AM methods is the distortion and residual stresses. If residual stresses can be predicted and controlled reasonably, it can have a significant impact on the quality of the part. To calculate the residual stresses, a full thermoelastoplastic analysis can be used, which is highly accurate but time-consuming. Another method, called inherent strain analysis, employs assumptions that simplify the analysis process and reduce the computational labor. In this study, using the inherent strain analysis, the residual stresses for three different parts, including a bridge part and tensile test specimens with circular cross sections built both horizontally and vertically, are obtained and compared with experimental results. The calculated residual stresses, while obtained with a minimal computational labor, show a very good agreement with the experimental results. Therefore, the use of inherent strain analysis for determining the residual stresses in the SLM method is verified.</p>

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Application of Inherent Strain Method to Predict Residual Stresses of Parts Manufactured by the Laser Powder Bed Fusion Melting Process

  • 期刊论文

  • 发表日期：

    2025年12月18日

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  • Seyed Ali Sadegh,
  • Ali Nayebi,
  • Amir Khosravifard

摘要

One of the challenges of AM methods is the distortion and residual stresses. If residual stresses can be predicted and controlled reasonably, it can have a significant impact on the quality of the part. To calculate the residual stresses, a full thermoelastoplastic analysis can be used, which is highly accurate but time-consuming. Another method, called inherent strain analysis, employs assumptions that simplify the analysis process and reduce the computational labor. In this study, using the inherent strain analysis, the residual stresses for three different parts, including a bridge part and tensile test specimens with circular cross sections built both horizontally and vertically, are obtained and compared with experimental results. The calculated residual stresses, while obtained with a minimal computational labor, show a very good agreement with the experimental results. Therefore, the use of inherent strain analysis for determining the residual stresses in the SLM method is verified.