{"id":4501,"date":"2023-11-14T08:25:22","date_gmt":"2023-11-14T13:25:22","guid":{"rendered":"https:\/\/cqfa.quebec\/?p=4501"},"modified":"2023-11-14T08:30:30","modified_gmt":"2023-11-14T13:30:30","slug":"multi-scale-model-to-simulate-stress-directionality-in-laser-powder-bed-fusion-application-to-thin-wall-part-failure","status":"publish","type":"post","link":"https:\/\/cqfa.quebec\/en\/multi-scale-model-to-simulate-stress-directionality-in-laser-powder-bed-fusion-application-to-thin-wall-part-failure\/","title":{"rendered":"Multi-scale model to simulate stress directionality in laser powder bed fusion: Application to thin-wall part failure"},"content":{"rendered":"<p><em><span class=\"TextRun SCXW45481802 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">Tangestani<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\">, R.; Chakraborty, A.; <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">Sabiston<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\">, T.; Yuan, L.; <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">Ghasri-<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">Khouzani<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\">, M.; Martin, E. (2023). <\/span><\/span><span class=\"TextRun SCXW45481802 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW45481802 BCX0\">Multi-<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">scale<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\"> model to <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">simulate<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\"> stress <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">directionality<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\"> in laser <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">powder<\/span> <span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">bed<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\"> fusion: Application to <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">thin-wall<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\"> part <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW45481802 BCX0\">failure<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\">.<\/span><span class=\"NormalTextRun SCXW45481802 BCX0\"> Materials &amp; Design, vol. 22, August 2023, 112147.<\/span><\/span><\/em><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"NormalTextRun SCXW146005623 BCX0\">In this study, line heat inputs are lumped to improve the computational efficiency while preserving stress directionality in laser powder bed fusion (LPBF). The lumped hybrid line (LHL) model predicts part distortion accurately within 10 \u00b5m of the experimental error in reasonable time. The effects of part geometry and scanning strategies on part distortion and failure during LPBF of thin-wall components are evaluated. Eight different printing patterns including different vector lengths and interlayer scan rotations for five different part lengths are studied. Simulation results show that the compressive stresses in the longitudinal and build directions create buckling, which limits <\/span><span class=\"NormalTextRun SCXW146005623 BCX0\">subsequent<\/span><span class=\"NormalTextRun SCXW146005623 BCX0\"> layer deposition. This causes in-process part failure called the limiting build height (LBH) effect. A strong correlation between the vector length and residual stresses is shown. Longer vector lengths generate smaller compressive residual stresses along the build direction while inter-layer scan rotations homogenize the internal stresses in the scanning plane. Increasing the vector length and introducing scan rotations are useful processing strategies to improve the LBH. Moreover, part failure can be mitigated by varying the part geometry. Increasing the part thickness reduces the susceptibility to buckling and increases the LBH, <\/span><span class=\"NormalTextRun SCXW146005623 BCX0\">whereas<\/span><span class=\"NormalTextRun SCXW146005623 BCX0\"> part length alters the failure mode.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p class=\"link-btn-style btn-yellow\"><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0264127523005622\" target=\"_blank\" rel=\"noopener\">Read the publication<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tangestani, R.; Chakraborty, A.; Sabiston, T.; Yuan, L.; Ghasri-Khouzani, M.; Martin, E. (2023). Multi-scale model to simulate stress directionality in laser powder bed fusion: Application to thin-wall part failure. Materials [&hellip;]<\/p>\n","protected":false},"author":80,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-4501","post","type-post","status-publish","format-standard","hentry","category-publications-academiques-quebecoises"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Multi-scale model to simulate stress directionality in laser powder bed fusion: Application to thin-wall part failure - CQFA - Carrefour qu\u00e9b\u00e9cois de la fabrication additive<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cqfa.quebec\/en\/multi-scale-model-to-simulate-stress-directionality-in-laser-powder-bed-fusion-application-to-thin-wall-part-failure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Multi-scale model to simulate stress directionality in laser powder bed fusion: Application to thin-wall part failure - CQFA - Carrefour qu\u00e9b\u00e9cois de la fabrication additive\" \/>\n<meta property=\"og:description\" content=\"Tangestani, R.; Chakraborty, A.; Sabiston, T.; Yuan, L.; Ghasri-Khouzani, M.; Martin, E. (2023). Multi-scale model to simulate stress directionality in laser powder bed fusion: Application to thin-wall part failure. 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