Experimental Investigation of Shrinkage Strains in Multilayered Stereolithography Parts
TL;DRAbstract
The shrinkage characteristics of stereolithography built square laminate plates using an acrylic based photopolymer were studied after they have been post-cured under ultraviolet and thermal exposure. The specimen plates consisted of a resin plate laser cured on an identical plate of the same material that already had been cured and post-cured. The assembled laminate was then cured, and the resulting out-of-plane displacement (warpage) due to shrinkage was recorded by means of the shadow moiré method. The exhibited warpage of the plates was related to the polymerization or cross-linking shrinkage strains through the elastic lamination theory, which was implemented to calculate the magnitude of the resulted shrinkage strains.
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The shrinkage characteristics of stereolithography built square laminate plates using an acrylic based photopolymer were studied after they have been post-cured under ultraviolet and thermal exposure. The specimen plates consisted of a resin plate laser cured on an identical plate of the same material that already had been cured and post-cured. The assembled laminate was then cured, and the resulting out-of-plane displacement (warpage) due to shrinkage was recorded by means of the shadow moiré method. The exhibited warpage of the plates was related to the polymerization or cross-linking shrinkage strains through the elastic lamination theory, which was implemented to calculate the magnitude of the resulted shrinkage strains.
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