These are rectangular shapes printed at the TU Eindhoven 3-D-concrete printer. Suiker elaborated his equations for rectangular layouts like these. Credit: Rob Wolfs/Eindhoven University of Technology
3D-printed materials commonly are soft and flexible during printing, leaving printed walls susceptible to collapse or falling over. Akke Suiker, professor in Applied Mechanics at Eindhoven University of Technology, had a Eureka moment and saw the solution to this structural problem. He developed a model with which engineers can now easily determine the dimensions and printing speeds for which printed wall structures remain stable. His formulae are so elementary that they can become commonplace in the fast growing field of 3D printing.
Conventional concrete deposited in formwork typically is al...
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