A SIMPLE FORMULA FOR THE DYNAMIC STRESS INTENSITY FACTOR OF AN IMPACTED FREELY-SUPPORTED BEND SPECIMEN

被引：20

作者：

KISHIMOTO, K ^{[1
]}

FUJINO, Y ^{[1
]}

AOKI, S ^{[1
]}

SAKATA, M ^{[1
]}

机构：

[1] ASAHI GLASS CO LTD,KANAGAWA KU,YOKOHAMA,KANAGAWA 221,JAPAN

来源：

JSME INTERNATIONAL JOURNAL SERIES I-SOLID MECHANICS STRENGTH OF MATERIALS | 1990年 / 33卷 / 01期

关键词：

Fracture Mechanics - Materials Testing--Impact;

D O I：

10.1299/jsmea1988.33.1_51

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The time history of the dynamic stress intensity factor is analyzed for a dynamic one-point bending test in which an edge-cracked specimen is impacted at the midspan without supports. A simple formula is derived for calculating the dynamic stress intensity factor with the specimen modeled as a cracked Euler-Bernoulli beam. Numerical examples are presented to demonstrate the practical applicability of the formula. It is shown that a reasonable accuracy is obtained by the present formula as compared with a finite element computation, and the CPU time is about 1% of the finite element method. Another numerical analysis is also performed for a steel 1PB specimen impacted by a falling cylinder. The contact force between the specimen and the impactor is estimated by applying Hert's theory to the local deformation near the contact point. The value of the dynamic stress intensity factor reaches its maximum at the instant when the specimen bends most sharply.

引用

页码：51 / 56

页数：6

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