Slot Machining Effects on Residual Stress Measurements Using the Crack Compliance Method

被引：0

作者：

NEMAF-Núcleo de Ensaios de Materiais e Análises de Falhas, Department of Materials, Aeronautics and Automotive Engineering, School of Engineering of São Carlos, University of São Paulo, Av. Trabalhador Sancarlense, 400, SP, São Carlos ^{[1
]}

13566-590, Brazil

机构：

来源：

J Test Eval | 2006年 / 2卷 / 149-153期

关键词：

Cracks; -; Sawing; Saws;

D O I：

10.1520/JTE12700

中图分类号：

学科分类号：

摘要：

The main aim of this paper was to evaluate the practical aspects and compare two of the most common machining techniques employed in the crack compliance 共incremental slitting兲 method for the determination of residual stresses, namely wire electrodischarge machining 共WEDM兲 and circular abrasive saws. For the circular saws, the effect of the rotational speed and blade thickness was also evaluated. Results show that the associated level of errors introduced during thin saw machining can be as low as the results obtained by WEDM machining. However, for practical reasons, WEDM machining offers a better control of cut increment length than sawing techniques. Additionally, higher rotational saw speeds are likely to introduce larger errors in strain readings probably due to higher frictional heat and plasticity generation ahead of the slot tip. Copyright © 2006 by ASTM International.

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