Research Milestones completed (Jan 2022 - Apr 2022)

Using the PFM anisotropic UEL/UMAT written on 2021, study of "Inter-granular" and "Trans-granular" Fracture in static conditions was carried out.
Two cases of an SEN(T) specimen with an inherent ordered microstructure (honeycomb & triangular respectively), were considered without introduction of randomness.
FRACTURE SURFACE TOPOLOGY - Statistical analysis for the hexagonal patterned grains were done by calculating the HURST Exponent for the 2D crack which in-turn signifies tracing back to the fracture mechanism and type of fracture.
SUCCEEDED in eliminating two problems:
- Issue that stress fields become "zero" even if the phase field is not "1".
- Spurious crack growth which diminishes the main crack and takes over its own growth pattern, thereby maximum stress not confined to crack tip, which should actually be the case.

Highlights of work (Jan 2022 - Apr 2022)

Crack Pattern for full model simulation of 2x2-tier Hexagonal Grained SENT Specimen (Gc_grain=100N/mm)

Crack Pattern for full model simulation of 2x2-tier Hexagonal Grained SENT Specimen (Gc_grain=1000N/mm)

Fracture Surface Topology

Simulated and Averaged Crack Path (Gc=100N/mm)

Simulated and Averaged Crack Path (Gc=1000N/mm)

Hurst Exponent(H) and check for its 'universality'

Exponential fit for Gc = 100N/mm

Small Scale persistent to Large Scale Anti-Persistent

Exponential fit for Gc = 1000N/mm

Small Scale Anti-Persistent to Large Scale Persistent

Page updated

Google Sites

Report abuse