CRACK DETECTION BY RESONANT-FREQUENCY MEASUREMENTS

被引：27

作者：

MCGUIRE, SM

FINE, ME

ACHENBACH, JD

机构：

[1] NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208

[2] NORTHWESTERN UNIV,CTR QUAL ENGN & FAILURE PREVENT,EVANSTON,IL 60208

[3] COMMONWEALTH ALUMINUM CO,MET DEV,LEWISPORT,KY 42351

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1995年 / 26卷 / 05期

关键词：

D O I：

10.1007/BF02670609

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The resonant frequency of 304 stainless steel specimens with a center-drilled hole has been measured as a function of fatigue cycles during crack initiation and propagation. Simultaneous measurements of crack lengths by scanning electron microscopy yield the resonant frequency vs crack length. The change of resonant frequency is equivalent to the change of an effective elastic modulus. Analytical results for a ''spring'' model to predict the change in effective modulus due to the presence of cracks have been compared with results derived from resonant tests. In the model, the load transfer across the plane of the crack is represented by a distribution of springs of stiffness that depends on the crack length. Good agreement is observed between theory and experiment for cracks up to 500-mu m long. The model may be used to obtain the crack length from resonance measurements.

引用

页码：1123 / 1127

页数：5

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