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Author Karalekas-D; Rapti-D; Kontomitros-C; Zacharopoulos-D; Gdoutos-EE
Source International-SAMPE-Technical-Conference. v 32 2000, p 68-75; 32nd International SAMPE Technical Conference. Boston, MA, United States
Abstract This paper reports on an experimental study undertaken to determine the polymerization induced residual stresses generated in stereolithography (SL) built test specimens by using the holedrilling strain gage method of stress relaxation. Experimentally measured strains, using special three-element strain gage rosettes, were input into the blind-hole analysis to calculate the induced residual stresses. The mechanical properties of resin specimens fabricated by the solidification process using an epoxy based photopolymer and post cured under ultraviolet (UV) and thermal exposure were determined and incorporated into the followed drill hole analysis. The effect of the pre-selected fabrication parameters (hatching space and curing depth) as well as of the followed post-curing procedure (UV, thermal curing) on the magnitude of the recorded strains it is also presented. 9 Refs. (Auth abstract) XX