Zentech is an independent UK-based company providing consultancy services and software to major international engineering companies. For over 30 years, Zentech has specialised in applying advanced engineering techniques to many engineering problems. These include non-linear dynamic analysis of Riser and pipeline systems for offshore installations, fracture mechanics based modelling and simulation of 3D non-planar crack growth, carrying out Residual Life Assessments and forensic engineering studies to determine the causes of structural / component failure.
Our services are supported by proprietary as well as third-party analysis and design tools. Foremost among these is our 3D crack analysis tool Zencrack, a state-of-the-art fracture mechanics capability for modelling and analysing 3-dimensional cracks, predicting their behaviour and growth under linear, non-linear, thermo-mechanical fatigue and time-dependent loading, ZenRiser and Pipeline software.
Zencrackuses Zentech's proprietary "crack-block" methodology to quickly and easily generate 3D finite element models of cracked components from user-supplied uncracked (.inp) meshes. Zencrack generates a new input file of the cracked component, runs Abaqus, extracts results from the Abaqus output and processes the results to provide energy release rates and stress intensity factor distributions. A plug-in capability for Abaqus/CAE helps generate the Zencrack input file from within the /CAE environment. Current version also includes an in-house developed GUI.
For static or transient loading without crack growth, Zencrack can evaluate and report SIFs, j-integrals and T-stresses along one or more crack fronts. Both linear and non-linear analyses can be undertaken using a range of the available capabilities in Abaqus/Standard.
For crack growth analysis, Zencrack predicts the magnitude and direction of 3D crack growth along each crack front and automatically advances each crack through the F.E. model. Several options are available for crack growth data definition including a user subroutine capability for complex proprietary data. A flexible "load system" approach is provided for defining load histories which may include complex thermo-mechanical and non-linear loading effects with fatigue and/or time dependent crack growth.