PSI - Issue 13

Shuai Wang et al. / Procedia Structural Integrity 13 (2018) 1940–1946 Author name / Structural Integrity Procedia 00 (2018) 000 – 000

1944

5

0 100 200 300 400 500 600 700 800

Stress  ture /MPa

10% Cold deformation 20% Cold deformation 30% Cold deformation 40% Cold deformation

0.00

0.05

0.10

0.15

0.20

Strain  ture

Fig.7. The curve of ture stress-strain curve with different cold deformation

4.2. Numerical simulation results The sample is stretched is shown in Fig.8. After the stretching, the Mises stress distribution on both sides of the sample is basically symmetrical, and the high stress area is mainly concentrated on the specimen gauge section.

Fig.8 Stress pattern of the plate tensile specimen The distribution of equivalent plastic strain (PEEQ) is shown in Fig.9. The equivalent plastic strain is also concentrated in the gauge length section of the sample.

Fig.9 Strain pattern of the plate tensile specimen

4.3. Results and discussion To obtain the mechanical properties of 316L austenitic stainless steel under different cold working conditions, the linear elastic plastic hardening relationship was selected as the simplified model of the real stress-strain curve of the material. The uniaxial tensile test was numerically simulated by ABAQUS finite element software. By continuously adjusted the yield limit σ 0 and the reduction coefficient δ to control the numerical simulation results. When the true stress-strain curve of the numerical simulation is in good agreement with the true stress-strain curve of the tensile test, the comparison chart is obtained as shown in Fig.10.