کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7221304 1470345 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Finite element simulation of the temperature and stress fields in single layers built without-support in selective laser melting
ترجمه فارسی عنوان
شبیه سازی عنصر محدود از زمینه های دما و استرس در لایه های تک بدون پشتیبانی در انتخاب ذرات لیزر
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
Overhanging and floating layers which are introduced during the build in selective laser melting (SLM) process are usually associated with high temperature gradients and thermal stresses. As there is no underlying solid material, less heat is dissipated to the powder bed and the melted layer is free to deform resulting undesired effects such as shrinkage and crack. This study uses three-dimensional finite element simulation to investigate the temperature and stress fields in single 316L stainless steel layers built on the powder bed without support in SLM. A non-linear transient model based on sequentially coupled thermo-mechanical field analysis code was developed in ANSYS parametric design language (APDL). It is found that the predicted length of the melt pool increases at higher scan speed while both width and depth of the melt pool decreases. The cyclic melting and cooling rates in the scanned tracks result high VonMises stresses in the consolidated tracks of the layer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design (1980-2015) - Volume 52, December 2013, Pages 638-647
نویسندگان
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