ISO 178
thingiverse
The ISO 178 standard bar is specifically designed for conducting flexural tests. This particular bar type is widely used in material science and engineering applications. The ISO 178 standard calls for a rectangular cross-section bar with dimensions of 5 x 10 mm and a length of 55 mm. The bar's surface must be polished to a high shine, and it should not exhibit any visible signs of scratches or imperfections.
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