Test Fixtures for ASTM C1674 Model: G-ASTM-C1674

Flexural Strength of Advanced Ceramics with Engineered Porosity. Used heavily in the aerospace (heat shields) and environmental (diesel particulate filters) sectors. The engineering focus is on the Macro-structure of the cells. When testing honeycomb or foam ceramics, standard 3-point bend formulas must be adjusted for the Effective Moment of Inertia. MTO’s contribution is a specialized software plugin that allows users to input the Cell Density or Wall Thickness to automatically adjust the stress calculations. Our fixtures for C1674 utilize articulating rollers with a larger radius (> 5 mm) to distribute the load across multiple cell walls, preventing the knife-edge effect that leads to localized crushing rather than global flexural failure.