Method for predicting non-uniform mechanical properties of brittle solid material

• Main Authors: ZHANG QISHUO, LI XIAOZHAO, JIA YAXING
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for predicting non-uniform mechanical properties of a brittle solid material. The method comprises the following steps: determining a non-smooth stress-strain curve of a material on the basis of a conventional triaxial compression test of a brittle solid material, and determining a non-smooth stress-strain theoretical curve description equation of the material through a fracture damage mechanical theory; and then comparing and analyzing non-smooth stress-strain curves obtained by tests and theories, determining the damage size and number of local weak areas in the material, and then determining a theoretical equation capable of describing the non-smooth curve of the material. Complex non-uniform mechanical properties of the brittle solid material caused by local damage of randomly distributed micro-defects are described, and important support is provided for better simulation analysis of engineering safety and stability of the brittle solid material. 本发明公开了一种脆性固体材料非均匀性力学性能预测方法