Finite-discrete element modelling of sea ice sheet fracture

A rate-independent, de-cohesive damage model for the fracture modelling of large, cellular, plate-like, quasi-brittle structures is proposed. hybrid, three-dimensional finite-discrete element method to investigate sea ice sheet then introduced, followed by three applications. The uniaxial tensile an varying physical sizes examined first. effects both size and loading rate applied on effective strength are investigated. vertical penetration loaded a rigid, flat-ended, cylindrical indenter next. breakthrough loads strengths computed, applicable scaling rules as regards searched for. To conclude, breaking containing circular hole surfacing, truncated cone studied (an axisymmetric contact problem). computed compared with that can be obtained analytically case in which structure stationary, moves, unilateral. While computing strengths, set self-similar samples in-plane range 1:16 examined. square; have side length either L=10, 20, 40, 80, or 160 m; thickness h=0.5, 1.0, 1.5 m. With sheets holes, only largest (L=160 m) results indicate i) strong functions L h; ii) function rate; iii) failure mode changes drastically L; iv) able demonstrate radial circumferential cracking; v) proposed (in-direct) approach compute conical offshore provides realistic results.