This cuts down hugely on start-up delays, which tend to be common with the Connex500 because its software is not very scalable, Vidimce told us. This software requires you to give a 3D mesh for every part of an object that specifies the boundaries. "This works if you're doing something simple, like three parts and three different materials, but not if you've got a complex structure where materials are mixed and keep changing at a fine level: it takes too long and you run out of memory quickly."
Not every engineer wants to specify exactly what material properties should go where. Some just want to say "make an object that functions like this." That's where Spec2Fab comes in, a functional approach to specification. Using a "reducer tree," it reduces the object into smaller components, and its "tuner network" decides what the material composition of each should be. "With Spec2Fab, you don't have to care about materials," Piotr Didyk, post-doctoral associate, told Design News, in the interview. "You specify your design goal and the software optimizes it for material placement to achieve that goal."
Although the two techniques weren't designed to be layered on top of each other, they could be used together, said Vidimce. "If you have specific constraints for some parts of an object, you can specify the materials for it using OpenFab. But in another part of the object that needs functional specification, Spec2Fab could be used."
The team will open source the API portion of OpenFab, but will release only binaries for the back-end that does all the work, said Vidimce. Spec2Fab will be open-sourced for academic use only to begin with, Pitchaya Sitthi-Amorn, post-doctoral associate, told us.
The team presented their work in two papers at SIGGRAPH 2013: "OpenFab: A Programmable Pipeline for Multi-Material Fabrication," by Kiril Vidimce, Szu-Po Wang, Jonathan Ragan-Kelley, and Wojciech Matusik and "Spec2Fab: A Reducer-Tuner Model for Translating Specifications to 3D Prints," by Desai Chen, David I. W. Levin, Piotr Didyk, Pitchaya Sitthi-Amorn, and Wojciech Matusik.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Many of the materials in this slideshow are resins or elastomers, plus reinforced materials, styrenics, and PLA masterbatches. Applications range from automotive and aerospace to industrial, consumer electronics and wearables, consumer goods, medical and healthcare, as well as sporting goods, and materials for protecting food and beverages.
Engineers trying to keep track of the ever-ballooning number of materials and machines for additive manufacturing and 3D printing now have some relief: a free searchable database with more than 350 machines and 450 different materials.
At JEC Europe Dow Automotive introduced a new ultra-fast, under-60-second molding cycle time for its commercial-grade VORAFORCE 5300 epoxy resin matrix for carbon composites. It's aimed at high-volume automotive manufacturing.
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