在混凝土表面悬空粘贴应变片,根据试验过程中应变片记录的变形数据,可以分析混凝土材料的断裂过程,确定起裂荷载和裂缝扩展长度,进而计算出起裂应力强度因子和失稳应力强度因子。计算结果符合双K理论。
Fracture process can be observed in concrete using stain ganges glued in the pre-notched tip extension line of wedge splitting specimen.According to strains recorded in the test, critical crack length was measured and initial cracking load was calculated.Both results meet the double-K model.