This novel approach calculates fracture toughness in ceramics using laser thermal cracking, indicating promising applications without mechanical constraints.
This study presents a novel noncontact method for measuring ceramic fracture toughness based on laser‐induced thermal cracking. The approach quantifies the ratio of crack propagation energy release to total laser energy input by relating laser energy to changes in the material's internal strain energy. Fracture toughness is calculated through an energy balance analysis during cracking, considering the crack propagation distance, extension length, and exposure duration. Validated through XFEM simulation and experiments on yttrium‐stabilized zirconia (YSZ), this method offers several advantages, including noncontact operation, the absence of external mechanical constraints, natural crack arrest, and suitability for extreme environments. A comparative analysis reveals a 4.2% divergence from traditional methods, enabling rapid and low‐cost multiple measurements.
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Yingzheng et al. (2025) studied this question.
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