Fracture Assessment of Notched Bainitic Functionally Graded Steels under Mixed Mode (I + II) Loading

被引：0
作者：
H. Salavati
Y. Alizadeh
F. Berto
机构：
[1] Shahid Bahonar University of Kerman,
[2] Amirkabir University of Technology,undefined
[3] University of Padova,undefined
来源：
Physical Mesomechanics | 2015年 / 18卷
关键词：
functionally graded steel; strain energy density; critical fracture load; notch radius; notch depth; notch opening angle;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The averaged value of the strain-energy density over a well-defined volume is one of the powerful criteria to assess the static strength of U- and V-notched specimens. This contribution is the first to investigate the effect of notch parameters (notch radius, notch depth and notch opening angle) for fracture assessment of specimens weakened by blunt V-notches made of bainitic functionally graded steels under mixed mode loading (I + II). A numerical method has been used to evaluate the boundary of the control volume, the mean value of the strain-energy density and the critical fracture load. Different values of the notch radius (0.5, 1.0, 1.5 and 2.0 mm), notch depth (5.5, 6.0 and 6.5 mm), notch opening angle (30°, 60° and 90°) and distance of the applied load from the notch bisector line (5 and 10 mm) have been considered. Moreover, this contribution shows that the mean value of the strain-energy density over the control volume can also be accurately determined from a coarse mesh for functionally graded steels.
引用
收藏
页码：307 / 325
页数：18
相关论文
共 165 条
  • [1] Novozhilov V.(1969)On a Necessary and Sufficient Criterion for Brittle Strength J. Appl. Math. Mech. 33 212-222
  • [2] Seweryn A.(1994)Brittle Fracture Criterion for Structures with Sharp Notches Eng. Frac. Mech. 47 673-681
  • [3] Susmel L.(2008)The Theory of Critical Distances to Predict Static Strength of Notched Brittle Components Subjected to Mixed-Mode Loading Eng. Fract. Mech. 75 534-550
  • [4] Taylor D.(2010)The Theory of Critical Distances to Estimate the Static Strength of Notched Samples of Al6082 Loaded in Combined Tension and Torsion. Part II: Multiaxial Static Assessment Eng. Fract. Mech. 77 470-478
  • [5] Susmel L.(1969)Näherungsweise Berechnung der Formzahl von Schweißnähten Schw. Schn. 21 97-105
  • [6] Taylor D.(2001)A Critetion for Crack Nucleation at a Notch in Homogeneous Materials C.R. Acad. Sci. II. B-Mec 329 97-102
  • [7] Radaj D.(2002)Strength or Toughness? A Criterion for Crack Onset at a Notch Eur. J. Mechanics. A. Solids 21 61-72
  • [8] Leguillon D.(2008)Fictitious Notch Rounding Concept Applied to Sharp V-Notches: Evaluation of the Microstructural Support Factor for Different Failure Hypotheses. Part I: Basic Stress Equations Eng. Fract. Mech. 75 3060-3072
  • [9] Leguillon D.(2009)Fictitious Notch Rounding Concept Applied to Sharp V-Notches: Evaluation of the Microstructural Support Factor for Different Failure Hypotheses. Part II: Microstructural Support Analysis Eng. Fract. Mech. 76 1151-1175
  • [10] Berto F.(2010)Fictitious Notch Rounding Approach of Pointed V-Notch under In-Plane Shear Theor. Appl. Fract. Mech. 53 127-135
12345678910