2004 / DB reference year
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Author Zhao, Wanhua; Li, Dichen; Lu, Bingheng ; Xi'an Jiaotong Univ., Xi'an 710049, China
Source Jixie Gongcheng Xuebao v 38 Issue:n 5 May 2002 p 47-51
Abstract Taking the part deformation in SL process as the objective of study, the source of shrinkage force and its acting principle are analyzed. Some concepts like shrinkage force and surface-distributed loads are proposed according to the resin shrinkage while curing and the adhesive characteristics between adjacent layers. Furthermore, the time-varied stiffness is presented based on the change of part structure during layer growth. With the FEA method, the deformation trend of part is demonstrated. Hence the nature of part deformation in SL process is exposed. The experiment results show that they are consistent with the theoretical analysis. Therefore, a hatching pattern called separate area scanning is proposed, which can improve the part accuracy by reducing the deformation. [References: 3] (Auth abstract) XX