Effects of additional holes diameter on transient thermal fatigue life

A series of finite element models were conducted in ASTM- A395 elastic– perfectly plastic ductile cast iron to investigate the effect of additional holes diameter on the transient thermal fatigue behavior of single hole specimens containing hole edge cracks. The Abaqus finite element package was used to modeling. The Abaqus data file for the uncracked mesh was read and processed by Zencrack fracture mechanics code. The energy release rate was used to drive crack growth calculations. Then it was discussed how the reduction of transient thermal stress distribution around the basic single hole affected the transient thermal fatigue life of the single hole specimens. The results show that transient thermal fatigue life and stress distribution factor at the edge of a base hole was affected by variations in diameter of the additional holes. The results from the numerical predictions are compared with experimental data

Keywords:

Single hole specimens , Transient thermal fatigue life , Transient thermal stress distribution , Additional holes diameter