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Sewn cotton fabric molds, stapled to a simple timber frame, are inexpensive and lightweight compared with wood or steel molds.
Photo Credit: Courtesy of the researchers.
Scientific Frontline: Extended "At a Glance" Summary: Fabric-Cast Concrete Beams
The Core Concept: MIT researchers have developed a method to cast highly efficient, topology-optimized concrete beams using inexpensive, sewn fabric molds.
Key Distinction/Mechanism: Instead of relying on expensive 3D printers or rigid wooden molds to form complex shapes, this technique leverages automated computational pattern-making to design textile molds that predict and harness how fabric deforms under the weight of wet concrete.
Major Frameworks/Components:
- Topology optimization: A computer-based design method that removes concrete from areas where it contributes little to structural performance.
- Graphic statics: A geometric method used to generate a simple, effective path for steel reinforcement so it evenly handles pulling forces.
- Automated pattern generation: A process that translates 3D structural designs into flat fabric panels, which are then cut and sewn into a precise, flexible mold.
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