Modal approach for processing one- and three-point bend test data for DSIF-time diagram determination. Part I - Theory

被引：21
作者：
Rokach, IV [1 ]
机构：
[1] Kielce Univ Technol, Dept Engn Mech, PL-25314 Kielce, Poland
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1998年 / 21卷 / 08期
关键词：
instrumented impact test; dynamic stress intensity factor; hybrid experimental numerical method; modal superposition method;
D O I：
10.1046/j.1460-2695.1998.00087.x
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A hybrid experimental/numerical method for the determination of the variation in the dynamic stress intensity factor (DSIF) with time during one- or three-point bend impact tests is presented. According to the concept of hybrid methods, a DSIF-time diagram is calculated for a particular mathematical model for the specimen using experimentally registered loading as the model excitation. The simple expression for the impact DSIF-response function is derived for an arbitrary linear model of the specimen, using the modal superposition method. Finally, formulae for DSIF calculations for different types of loading approximation are derived.
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页码：1007 / 1014
页数：8
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