FLUID & SOLID ENGINEERING

Fluid Engineering

TTL has world expert rheologists who can assist in developing the proper test methods for characterizing your material, interpreting your results, and making recommendations for formulation modifications. We have state of the art instrumentation, and develop custom fixtures for project-specific characterization.
  • Test Method development
  • Result interpretation and analysis
  • Modification recommendations
Here at TTL, you will have access to a panel of expert rheologist whom will be able to provide you with feasible and worthwhile examination ways tailored to meet your specific material properties.In addition TTL will provide you with training and consultation, formulation and any modifications if needs be based on the material characteristics provided.
All of this and much more are being made possible thanks to our state of the art instruments and equipment as well as tailored fixtures designed for your specific project characterisation.We have seen every kind of fluid, from low viscosity Newtonian materials through complex shear sensitive liquids and yielding and plastic fluids. Our detailed understanding of the phenomena and the instruments provides the highest chance of success and the most valuable understanding of the process at work.
Our rheologist have a combined experience and expertise in working with all kinds of fluids ranging from Newtonian fluids and low viscosity materials to complex shear sensitive liquids and yielding and plastic fluids.With our combined understanding and experience of such phenomena and our state of the art instruments and equipment, TTL will provide the greatest possible change of success.Testing is carried out in compliance with the following standards (and others):
  • Measuring Solution Viscosity of Polymers with a Differential Viscometer
  • Determination of Solution Viscosities of Polyamide
  • Determination of the Viscosity of Polymers in Dilute Solution Using Capillary Viscometers
  • Melt flow rates of thermoplastics
  • Determining inherent viscosity of (poly ethylene terephthalate) (PET) by glass capillary viscometer
  • Dilute solution viscosity of polymers
  • Viscoelastic properties of paste ink vehicle using an oscillatory rheometer
  • Kinematic Viscosity of Transparent and Opaque Liquids
  • Rubber-Determination of Gel, Swelling Index, and Dilute Solution Viscosity
  • Determination of the Melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics
  • Use of a Melt Index Strand for Determining Density of Polyethylene
Shear Rheometry
Small amplitude oscillatory rheometry
  • Storage and Loss Modulus
  • Storage and Loss Viscosity
  • Strain-dependent properties
  • Gelation and melting kinetics
Steady Shear Rate
  • Shear viscosity as a function of shear rate
  • First normal stress coefficient
  • Yield stress determination
Creep
  • Material response to a fixed load
Temperature Sweeps
  • Viscosity changes with temperature ramps
Extensional Rheometry
  • Extensional viscosity versus shear rate
  • Breakup time
  • Relaxation time determination

Structural analysis

At TTL, we provide all the support, training and consultation needed for companies to establish their own ability to carry out structural analysis.
  • Technical supports
  • Training
  • Consultation
Our knowledge and experience of such software enables us to take the correct approach towards the work at hand, that being covering beam, shell and solid meshing, contact modelling and handling of static and dynamics loading conditions.We work for civil, mechanical and aerospace engineers involved in the design of structures of all sizes, such as tunnels, bridges and dams, aircraft, and rocket bodies, mechanical parts, and even plastic cutlery and staples. We use Stress analysis in the maintenance of such structures, and to investigate the causes of structural failures.
  • Stress analysis for the maintenance of structures
  • Stress analysis to investigate the causes of structural failures
We tackle all types of static, dynamic and buckling simulations for fabrication and assemblies.
Linear and Non-linear Buckling
A very important and vital part to take into account is linear and nonlinear buckling. Our stress analysts and engineers are able to provide you with details of such predictions and the safety factors that must be taken into account during the design and development stage, providing the best support, consultation and training to our clients to ensure a successful project completion.
Fatigue Life Prediction
One of the most common problems is Fatigue life predictions of structures and systems. Our team of structural engineers and stress analysts are able to associate physical data and laboratory testing with simulation data, ensuring that project meets are the design requirements and safety standards.
Thermal Stress Analysis
The temperature distribution in a part can cause thermal stress effects (stresses caused by thermal expansion or contraction of the material). We perform a steady-state analysis before doing a transient thermal analysis, to help establish initial conditions. A steady-state analysis also can be the last step of a transient thermal analysis; performed after all transient effects have diminished.We use thermal analysis to determine temperatures, thermal gradients, heat flow rates, and heat fluxes in an object that are caused by thermal loads that do not vary over time. Such loads include the following: Convections, Radiation, Heat flow rates, Heat fluxes (heat flow per unit area), Heat generation rates (heat flow per unit volume), and Constant temperature boundaries.
Failure Analysis
In failure analysis models we investigated common failure model such as mechanical overloading, plastic collapse, localised yielding or wear. However, we have also investigated other potential causes of failure such as hydrogen embrittlement and ageing, including stress corrosion cracking.
Non-Linear Engineering Materials and Large Deformation
We can translate complex non-linear behaviour into efficient material models suitable for FEA. This includes the project management of material physical tests, development and validation of constitutive models to implement within our clients’ analysis software.We have significant experience handling large deformation problems involving extensive contact and rigid body motion, covering nuclear, aerospace, automotive, and consumer products among other industries.With specialised skills in the analysis of GRP, sandwich, honeycomb and other anisotropic materials, we have undertaken a range of projects in aerospace and other industries requiring strong, lightweight structures.