Simulation and Experimental Verification of Crystalline Polymer and Direct Metal Selective Laser Sintering 100
Simulation and Experimental Verification of Crystalline Polymer and Direct Metal Selective Laser Sintering 100
复制标题
结晶聚合物和直接金属选择性激光烧结的模拟和实验验证 100
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
A. Tontowi
中科院分区：
文献类型：
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作者：
T. Childs;C. Hauser;C. Taylor;A. Tontowi
先前开发的非晶态聚合物 SLS 二维有限元模拟已扩展到结晶聚合物和金属的研究。对于结晶聚合物，需要进行三项开发：熔化潜热的处理，修改粘性致密化定律以允许熔化过程中材料的结晶部分，以及为了与实验获得一致，考虑二氧化碳激光辐射进入粉末床的吸收深度；但二维处理仍然足够。对于金属，需要不同的致密化定律和三维建模来与不锈钢粉末床的实验相一致。
A previously developed two-dimensional finite element simulation of the SLS of amorphous polymers has been extended to the study of crystalline polymers and metals. For crystalline polymers, three developments have been needed: the treatment of latent heat of melting, the modifying of a viscous densification law to allow for the crystalline fraction of material during melting and, to obtain agreement with experiments, a consideration of the absorption depth of CO2 laser radiation into the powder bed; but the two-dimensional treatment remains sufficient. For metals, a different densification law and three-dimensional modelling have been needed for agreement with experiments on stainless steel powder beds.