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模型材料石膏具有与混凝土相似的断裂力学特性。混凝土和石膏两者在复合型荷载下的试验数值与最大拉应力判据曲线颇为吻合,并且它们的断裂韧度是它们的抗拉强度的线性函数。二维石膏块体断裂破坏模拟试验结果与有限元计算十分相近,从而模型试验为解决水工结构断裂问题提供了途径。
Model Material Gypsum has similar fracture mechanics properties to concrete. The test values for both concrete and gypsum under composite loading are in good agreement with the maximum tensile stress criterion curves and their fracture toughness is a linear function of their tensile strength. The simulation test results of fracture damage of two-dimensional gypsum block are very similar to the finite element calculation, so the model test provides a way to solve the problem of hydraulic structure fracture.