Local strain energy density to predict mixed mode I plus II fracture in specimens made of functionally graded materials weakened by V-notches with end holes

被引：13

作者：

Mohammadi, H. ^{[1
]}

Salavati, H. ^{[2
]}

Mosaddeghi, M. R. ^{[1
]}

Yusefi, A. ^{[3
]}

Berto, F. ^{[4
]}

机构：

[1] Amirkabir Univ Technol, Dept Mech Engn, Tehran, Iran

[2] Shahid Bahonar Univ Kerman, Dept Mech Engn, Kerman, Iran

[3] Amirkabir Univ Technol, Dept Min & Mat Engn, Tehran, Iran

[4] NTNU, Dept Engn Design & Mat, Trondheim, Norway

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2017年 / 92卷

关键词：

Functionally graded materials; Tungsten; Copper; V-notches with end hole; Mixed mode; Strain energy density; STRESS INTENSITY FACTORS; U-NOTCHES; BRITTLE-FRACTURE; ROUNDING CONCEPT; ELASTIC-MATERIALS; SHAPED NOTCHES; I/III FRACTURE; PLATES; FAILURE; SHARP;

D O I：

10.1016/j.tafmec.2017.05.009

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The mixed mode fracture of specimens weakened by V-notches with end holes (VO-notch) made of W-Cu functionally graded material (W-Cu FGM) has been investigated in this paper. In experimental section, W-Cu FGM specimens were fabricated by powder metallurgy technique. A number of fracture tests were performed on VO-notched W-Cu FGM specimens under in-plane mixed mode for various notch tip radii, notch depths, and notch opening angles. In theoretical section, a criterion based on the averaged value of strain energy density over a welldefined control volume was proposed to predict the fracture loads of VO-notched FGM specimens under mixed mode I + II. In addition, the effect of notch geometrical parameters (notch tip radius, notch depth, and notch opening angle) on fracture load was studied. This study demonstrates that SED works well on VO-notched FGM specimens under mixed mode I + II loading. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：47 / 58

页数：12

共 53 条

[1] Friction stir forming to fabricate copper-tungsten composite [J].