Honors College Thesis
 

Validation of Design For Additive Manufacturing Heuristics for Aperiodic Structures through Application to Regular Structures

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https://ir.library.oregonstate.edu/concern/honors_college_theses/m613n623c

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  • Aperiodic structures cause significant challenges to subtractive manufacturing methods due to the common features such as inaccessible voids within the structure. Additive man- ufacturing presents an appealing alternative for this purpose. The aim of this research is to test analysis heuristics for validity through application to periodic structures. First, a heuristics based method for analyzing the manufacturability of aperiodic structures is assessed through application to periodic structures. Second, defects are introduced into periodic structures to analyze how each heuristic may be used to predict the effects of defects in additively manufactured structures. Third, the results of computational analy- sis are validated through compressive testing of manufactured samples with and without defects. The results show that heuristics-based analysis is an effective tool for general analysis of additively manufactured structures. Several heuristics show a drastic decrease in effectiveness as regularity increases. Additionally, additively manufactured parts with defects show desirable characteristics, such as higher uniformity in compressive strength. I conclude by discussing the limitations of heuristics based analysis and provide recom- mendations for possible improvements to the heuristics based method. By proving this analysis method to be valid for both regular and aperiodic structures, these heuristics for determining the manufacturability of a given part become a powerful tool in understanding the challenges and benefits that additive manufacturing provides.
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