Complex FEA Analysis Methods
RTJ Consultants consider complex FEA methods to be those that are either non-routine, require additional licenses or a considerable setup and validation timeframe.
Many small FEA companies will provide minimal or weakly justified analysis reports that hide modelling or assumption errors. With RTJ Consultants you can expect detailed justification reports for all work we do. Our consultants have been drawn from industries with high regulatory and quality requirements. Quality is built into our mindsets from decades of experience.
Complex Scenarios
Multiple scenarios or loading steps can be simulated. Imagine a composite part being cured, internally there are baked in stresses, in service there are fatigue loads applied with damage propagation during a cyclic thermal regime. These multi continuation case scenarios can be modelled but are complex to validate. RTJ Consultants are available with the skills to carry out these complex loading scenarios.
Non-linear Models
Not all scenarios fall within the small displacement theory and constant material properties and so need non-linear models. Alternatively, simulations that pass into the plastic region might be needed. RTJ Consultants have the experience to develop these complex models that use model large deflections, non-linear materials, non-linear material properties, non-linear loadings or large sliding contacts. Many simulations that we see in this category are incorrectly set up and produce poor results. RTJ Consultants however are experts and will ensure that our models are validated against expected behaviours.
Frequency Response
Do you need to know how a part behaves under a full vibration spectrum? Are you concerned that parts might contact each other and whether you need to add stiffness. RTJ Consultants have several detailed methods that can be applied to determine frequency responses that can answer these questions.
Damage Propagation
Do you have a bonded joint, cracks, or delaminations and need to understand residual strengths or propagation loads? RTJ Consultants can use multiple techniques to analyse these behaviours including using cohesive zone models. These are highly dependent on good selection of element sizes and time steps, things that RTJ Consultants have an expert understanding of.
Non-Linear Buckling
Not all scenarios fall within the small displacement theory, constant loads and properties assumption and so non-linear models are required. Similarly, simulations that pass into the plastic region require non-linear approaches or local linearisation. RTJ Consultants have the experience to develop these complex models that use model large deflections, non-linear materials, non-linear material properties, non-linear loadings or large sliding contacts. Many simulations that we see in this category are incorrectly set up and produce poor results. RTJ Consultants however are experts and will ensure that our models are validated against expected behaviours.
Non-linear Structural Thermal
Add convection, radiation and conduction to multilayer materials and a structure under complex loading and you have non-linear transient thermal structural analysis. Contact our specialists now to discuss how RTJ Consultants can carry out these types of analysis for you.
Flutter
Flutter analysis is not vibration. In its basic form it is an interaction of lift with torsional and bending stiffnesses. Tuning of these stiffnesses is key to a successful flutter design. There are few places in the UK with in-house ability to perform flutter analysis. RTJ Consultants can offer this and are considered experts in the field.