Finite-Element Modelling of Nonlinear Behaviour of the Middle Ear (5 of 41)

Next

Finite-Element Modelling of<br> Nonlinear Behaviour of the Middle Ear

1. Outline

2. Nonlinear behaviour of the middle ear

2. Nonlinear behaviour of the middle ear (cont'd)

5 of 41

3.1 Stuhlman (1937)

3.2 Stuhmiller (1989)

3.3 Price & Kalb (1991)

3.4 Chen (1993)

3.5 Wada & Kobayashi (1990)

3.6 Pascal <em>et al.</em> (1998)

4.1 What?

4.2 Why?

4.3.1 Choice of element geometry

4.3.2.1 Type of problem

4.3.2.2 Assumptions about mechanical behaviour

4.3.2.3 Material laws

4.3.2.4 Methods for formulation

4.3.3 Mesh generation

4.3.4 Specification of material properties

4.3.5.1 Linear calculation of static responses

4.3.5.2 Natural frequencies and modes

4.3.5.3 Time-domain responses and frequency responses

4.3.6 Testing for convergence

5. Nonlinear finite-element modelling

5.1 Solution methods

5.1 Solution methods (cont'd)

5.2 Sources of nonlinearity

6. Nonlinear behaviour of tissues

6. Nonlinear behaviour of tissues (cont'd)

6.1 Bone

6.2 Soft tissues

6.2.1 Hysteresis

6.2.2 Preconditioning

6.2.3 Rate dependence

6.2.4 Creep and relaxation

7. Example

7. Example (cont'd)

8.3 Free

9. Acknowledgements

10. References

2. Nonlinear behaviour of the middle ear (cont'd)

Types of nonlinear middle-ear behaviour:

stiffening, e.g., tails of tympanogram
viscoelastic effects, e.g., creep and hysteresis: important effects on tympanometric data (Osguthorpe and Lam, 1981)

Start

Next

Last modified: Sun, 2002 Jan 27 17:15:20
Slide show generated from d:\funnell\aro2002\nonlinear.html by Weasel 2002 Jan 27