Advanced Analysis

Finite Element Analysis

The use of finite element analysis (FEA) has become common in recent years and is now the basis for most engineering designs. Numerical solutions to very complicated stress problems can now be readily obtained using FEA.

Deacon Engineers understands the importance of FEA and recognises that the accuracy of any modelling and solutions is fundamentally reliant on the experience and knowledge of the analyst. Years of practical design and manufacturing experience, combined with extensive use of FEA, enable us to provide unique pragmatic solutions.

Our FEA services utilise ANSYS, Strand7 and SPACE GASS software, and include:

  • Linear and non-linear static analysis
  • Buckling analysis
  • Spectral and harmonic response analysis
  • Linear and non-linear steady-state and transient heat transfer analysis
  • Transient dynamic behaviour analysis
  • Fatigue life estimation

Fatigue Analysis

Deacon Engineers is able to take design solutions to accurate and confident levels with the help of fe-safe fatigue analysis software. With fe-safe and our finite element models, we are able to:

  • Predict when fatigue cracks will initiate
  • Predict where fatigue cracks will occur
  • Predict whether cracks will propagate
  • Process measured strain gauge data
  • Apply actual load data to existing and future design simulations

This is done by using advanced methods including:

  • Uni-axial strain and stress life methods
  • Bi-axial strain and stress life methods
  • Vibration fatigue
  • Fatigue analysis of welded joints to BS7608 including the utilisation of critical plane analysis
  • Fatigue analysis of welded joints using the Verity® structural stress method

Dynamic Analysis

Dynamic analysis determines the response of structures and equipment that are in motion as a result of applied forces. It is carried out when loading is time-dependant, or when inertial forces (forces associated with the motion of a body) have to be considered. Dynamic Analysis can typically determine the response of a vibrating feeder and crusher structure to ensure that the vibration levels are kept to acceptable levels.

We utilise ANSYS and Strand7 for our analyses which include:

  • Transient dynamic analysis including shock and impact loading
  • Natural frequency analysis
  • Harmonic response

Fracture Mechanics Assessments

Fracture mechanics is used in engineering to establish acceptance levels for flaws revealed by the use of non-destructive examination techniques. This in turn leads to the concept of fitness for purpose. A mechanical structure is considered adequate for its purpose as long as the conditions to cause its failure are not reached. Deacon Engineers have the expertise to carry out flaw assessments on a fitness for purpose basis by offering post-crack initiation study services.

We have the expertise to carry out the following post-crack-initiation studies:

  • Stress intensity factor calculation
  • Fatigue crack growth rate calculation
  • Critical crack size determination
  • Crack path prediction
  • Residual strength calculation
  • Contact load redistribution during crack growth
  • Incorporation of effects of thermal stresses in crack growth simulation

Crack in gearCrack in gear

Computational Fluid Dynamics

Computational Fluid Dynamics (CFD) Analysis is used to model fluid flows, from highly viscous fluids as slurries to low viscosity fluids as air.  It is used to model simple closed loop systems as well as complex multiphase transient systems in order to determine the behaviour of fluids and the effects this has on the equipment. CFD is used to optimised systems to reduce flow restrictions, cavitation, pressure transients and the like which in turn reduces equipment operating costs.

We utilise Ansys Fluent and CFX to undertake our CFD studies

  • Single and multiphase flow analysis
  • Free surface flow analysis
  • Reacting flow analysis
  • Turbomachinery analysis
  • Multiphysics analysis