The matching of constraint between laboratory specimens and actual cracked structures is a key problem of the accurate structure integrity assessment. Different laboratory specimens and the steam turbine blade with different constraints were selected, the matching of constraint between steam turbine blade and laboratory specimens was investigated. The results shown that the steam turbine blade with 2c = 50 mm, a/2c = 0.20 has a matching constraint with single edge-notched bend specimen with a/W = 0.6 and single edge-notched tensile specimen with a/W = 0.3. The steam turbine blade with 2c = 50 mm, a/2c = 0.25 has a matching constraint with single edge-notched bend specimen with a/W = 0.7. The steam turbine blade with 2c = 50 mm, a/2c = 0.30 has a matching constraint with single edge-notched bend specimen with a/W = 0.5 and single edge-notched tensile specimen with a/W = 0.1. The steam turbine blade with 2c = 50 mm, a/2c = 0.35 has a matching constraint with single edge-notched bend specimen with a/W = 0.4, compact tension specimen with a/W = 0.3 and central-cracked tension specimen with a/W = 0.7. The steam turbine blade with a = 15 mm, a/2c = 0.30 has a matching constraint with compact tension specimen with a/W = 0.7 and single edge-notched tensile specimen with a/W = 0.5. The steam turbine blade with a = 15 mm, a/2c = 0.40 has a matching constraint with compact tension specimen with a/W = 0.4. The steam turbine blade with a = 15 mm, a/2c = 0.50 has a matching constraint with single edge-notched bend specimen with a/W = 0.5.

实验室标本与实际开裂结构之间的约束条件匹配是准确评估结构完整性的关键问题。选择了不同的实验室标本和具有不同约束条件的汽轮机叶片，研究了汽轮机叶片与实验室标本之间约束条件的匹配。结果表明，2 c  = 50 mm，a / 2 c  = 0.20的汽轮机叶片具有匹配约束条件，其中单个边缘缺口弯曲样本的a / W  = 0.6和单个边缘缺口拉伸样本的a / W  = 0.3。汽轮机叶片的2 c  = 50 mm，a / 2Ç  = 0.25具有与单边缘切口弯曲试验片的匹配约束一个/ w ^  = 0.7。汽轮机叶片2 C ^  = 50毫米，一/ 2 ç  = 0.30具有带有单一一个匹配约束边缘切口弯曲试验片与一个/ w ^  = 0.5和单边缘缺口拉伸试样用一个/ w ^  = 0.1。与2所述的蒸汽涡轮机叶片Ç  = 50毫米，一/ 2 ç  = 0.35具有带有单一一个匹配约束边缘切口弯曲试验片与一个/ w ^  = 0.4，紧凑拉伸试件与一/ W  = 0.3，中心裂纹拉伸试样的/ W  = 0.7。a  = 15 mm，a / 2 c  = 0.30的汽轮机叶片具有匹配约束条件，其中紧凑的拉伸试样的a / W  = 0.7和单边缘切口的拉伸试样的a / W  = 0.5。的蒸汽涡轮机叶片与一个 长度为15 mm，一个/ 2 ç  = 0.40具有紧凑拉伸试件与匹配的约束一个/ w ^  = 0.4。与汽轮机叶片一个 = 15毫米，一个/ 2 ç  = 0.50具有与单边缘切口弯曲试验片的匹配约束一个/ w ^  = 0.5。