What we do

We provide modeling and custom software as well as offer our already developed software to simulate the most challenging material failure problems in structural, mechanical, civil, aerospace, and other engineering disciplines. These include finite element software in the areas of

constitutive models of inelasticity, damage, phase field in large or linearized kinematics,
coupled problems,
mesh generators that guarantee quality elements and isoperimetry (i.e., absence of preferred orientation) especially for cohesive modeling,
cohesive fracture.
AI based multiscale analysis

Highlights of our cohesive fracture code

A general-purpose solver that assumes gradual decohesion of interfaces according to an "initially rigid" traction-separation relationship, whose parameters are G_c and the material tensile strength or the critical crack opening at loss of cohesion.
Energy-based, meaning that the solution is obtained by minimizing an energy functional. This would be the same as usual FEM for a smooth convex functional but here the cohesive potential makes the functional singular and non-convex.
Incorporates an in-house developed mesh generation package that guarantees well-shaped and isotropic elements suitable for cohesive modeling. The above meshes are generated in a matter of seconds. The numerical results indicate that the solution is unique and convergent.

Is convergent in time and with respect to mesh refinement. Theory and computational studies indicate that our code converges both with respect to time-step (left figure below) and with mesh refinement (right figure below). Other widely used methods do not always share these properties. Convergence leads to improved robustness.

The energy method provides a "time continuous" solution, which means a more robust solution. In particular it results in smooth velocity profiles, which proved crucial in our hydraulic fracture simulations, see velocity contours below.

What we do

Highlights of our cohesive fracture code

Our code

Time discontinuous code