Stress relief

Abstract

a)b) c) d) Figure 1: A model of a dragon was first hollowed to reduce stress caused by its weight if held by the head (a). The stress decreased, but the neck had to be still thickened (b,c). The object was still too front heavy causing a twist deformation on the legs (c), that was eliminated by fixing the model to the pedestal by a strut (red) (d). These steps were done automatically by our system. AbstractThe use of 3D printing has rapidly expanded in the past couple of years. It is now possible to produce 3D-printed objects with exceptionally high fidelity and precision. However, although the quality of 3D printing has improved, both the time to print and the material costs have remained high. Moreover, there is no guarantee that a printed model is structurally sound. The printed product often does not survive cleaning, transportation, or handling, or it may even collapse under its own weight. We present a system that addresses this issue by providing automatic detection and correction of the problematic cases. The structural problems are detected by combining a lightweight structural analysis solver with 3D medial axis approximations. After areas with high structural stress are found, the model is corrected by combining three approaches: hollowing, thickening, and strut insertion. Both detection and correction steps are repeated until the problems have been eliminated. Our process is designed to create a model that is visually similar to the original model but possessing greater structural integrity.

Lightweight structure design under force location uncertainty

“…The de nitive Version of Record was published in ACM Transactions on Graphics, https://doi.org/http://dx.doi.org/10. 1145/3072959.3073626. ubiquitous in shape design [Christiansen et al 2015;Lu et al 2014;Stava et al 2012;Wang et al 2013]. In many such methods, a common approach is to model the external forces as known and xed quantities.…”

Agile structural analysis for fabrication-aware shape editing

“…where the components of w are the weights of the internal vertices and the Laplace operator is calculated using Mean Value Coordinates (Tao et al, 2005). The solved weights are consistent with the weights of the surface vertices and vary smoothly inside the tetrahedral mesh.…”

Computational Interaction

“…Several computational design methods consider the functionalities of objects' mass properties (e.g., standing stability [34]). Structural strength of objects is also an important design criterion, and some computational design methods take this into consideration (e.g., [41]).…”