PSI - Issue 42

Zeng Chen et al. / Procedia Structural Integrity 42 (2022) 180–188 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

184

5

25mm (Half width)

Load

Symmetry plane

Symmetry plane

B=10mm

Crack surface

85mm (Half length)

12.5mm (Half crack length, a/W =0.5)

(c)

Load

25mm (Half width)

Crack surface

B=10mm

Symmetry plane

Symmetry plane

75mm (Half length)

(d)

12.5mm (Half crack length, a/W =0.5)

Figure 4. One-quarter finite element models for (a) SEN(B) specimen, (b) C(T) specimen, (c) 3 Point Bend specimen and (d) 5 Point Bend specimen

Figure 5. Detail of crack-tip mesh

4. Results and discussion 4.1. Validation of numerical modelling For C(T) and SEN(B) models, the simulated J -integral was extracted from the 10th contour at the midplane and then converted into stress intensity factor K JC with the following equation: = √ 1 − 2 ;ϯͿ Where E is t he Young’s modulus and v is the Poisson’s ratio . To validate the accuracy of biaxial bending and