A CALCULATION-EXPERIMENTAL STUDY OF CRACK-TIP OPENING DISPLACEMENT AND RESIDUAL STRESSES UPON WARM PRESTRESSING

被引：0

作者：

Pokrovskii, V. V. ^{[1
]}

Sidyachenko, V. G. ^{[1
]}

Ezhov, V. N. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Pisarenko Inst Problems Strength, Kiev, Ukraine

来源：

STRENGTH OF MATERIALS | 2011年 / 43卷 / 01期

关键词：

warm prestressing; fracture toughness; heat-resistant reactor pressure vessel steels; FRACTURE-TOUGHNESS; CLEAVAGE FRACTURE;

D O I：

10.1007/s11223-011-9267-z

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

For a reactor pressure vessel steel 15Kh2MFA(III) experiments and calculations have been carried out to study the factors that have an influence on the increase of the lower-shelf fracture toughness in the temperature dependence diagrams upon warm prestressing. Stereoscopic fractography and numerical investigation have demonstrated that after the warm prestressing the crack tip remains blunt. This reduces the stress singularity during subsequent loading and raises the material fracture toughness. The paper gives the calculated data on residual stresses and crack-tip opening displacement during warm prestressing and upon relief. The calculated results are shown to agree well with the known analytical relations and experimental data.

引用

页码：56 / 65

页数：10

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