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LUSAS Nonlinear Analysis

Course Summary:

A three-day course aimed at all engineering disciplines, for users who are familiar linear static structural analysis in LUSAS. 

The course covers the theoretical and practical considerations of nonlinear analysis. The course consists equally of presentations and ‘hands-on’ sessions. Optional modules are available to cater for product-specific analyses such as composite failure modelling.

Who should attend:

LUSAS users familiar with linear static analysis, with a requirement for nonlinear analysis.

Course Dates

Dates Location Duration Cost (GBP) Booking
8-10 March 2017 Kingston upon Thames, UK 3 days £950 No more bookings
7-9 June 2017 Kingston upon Thames, UK 3 days £950 No more bookings 
13-15 September 2017 Kingston upon Thames, UK 3 days £475
6-8 December 2017 Kingston upon Thames, UK 3 days £475

Note: The 3-day LUSAS Nonlinear analysis courses run immediately after the 2-day LUSAS Dynamics Analysis courses.


Some delegate feedback from recent LUSAS training courses:

  • “This class was excellent and one of the best training courses that I have taken." (Tim E.)

  • “Very good demonstrations/teachers with a good variety of hands on examples.” (Douglas R.)

  • "The instructor was phenomenal! Engaged, energetic, helpful and friendly! Could not have asked for a better one." (Joe K.)


Course Details:

Day 1:

Introduction to Nonlinear Analysis (ANL-1)

Introduces the concepts, types and terminology of nonlinear finite element analysis.

  • Fundamentals of nonlinearity
  • Material nonlinearity
  • Geometric nonlinearity
  • Nonlinear boundary conditions
  • Nonlinear analysis concepts
  • Nonlinear analysis specification in LUSAS

Nonlinear Solution Procedures and Control (ANL-2)

The inner workings of a LUSAS nonlinear run are described to aid the user in the specification of LUSAS solution data. Also considered is geometric nonlinearity looking at large displacement analysis.

  • Nonlinear solution strategy
  • Incremental loading procedures
  • Newton-Raphson iteration methods
  • Iterative acceleration
  • Constrained solution methods
  • Convergence criteria
  • Solution termination
  • Nonlinear output control

Day 2:

Material Nonlinearity 1 - Elasto-Plasticity (ANL-3)

Elasto-plastic analysis is covered in some detail, comparing the different material models available in LUSAS.

  • Material nonlinearity
  • Elasto-plastic behaviour
  • Continuum plasticity models
  • Elasto-plastic analysis of frames
  • Interface plasticity

Material Nonlinearity 2 - Other Materials (ANL-4)

Introducing a wide range of material models, from ductile fracture, through volumetric crushing to rubber.

  • Ductile fracture
  • Continuum damage
  • Volumetric crushing (foam)
  • Hyper-elastic (rubber)
  • Visco-elasticity (creep)
  • User-defined material models

Day 3:

Nonlinear Boundary Conditions (ANL-5)

Covering both simple lift-off and general contact. The LUSAS slideline facility is described in detail for use in general contact and impact analyses.

  • Joint element methods
  • Slideline methods
  • Practical considerations

Optional Modules

Composite Failure Analysis (CMP-2)

Looks at post-failure behaviour of composite products and components and covers:

  • Composite failure models
  • Matrix failure modlling
  • Delamination modelling

To Book

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