Finite ELEMENT ANALYSIS

1. 1
PRODUCT LIFE CYCLE MANAGEMENT
 With the integration of CAE in product life cycle management (PLM) , finite element analysis (FEA)
can be performed during the design process, closing the design-analysis gap, minimising design
iterations, and almost eliminating the need for physical prototyping and testing.
 FEA simulates the operating characteristics of engineers’ designs digitally, well in advance of
prototype tooling

2. Dept of Automobile Engineering 16MET61-Finite Element Analysis 2
ENGINEERING ANALYSIS
There are 3 different approaches for Engineering Analysis.
1. Experimental Methods
2. Analytical Methods
3. Numerical Methods

3. Dept of Automobile Engineering 16MET61-Finite Element Analysis 3
1.Experimental Method
 Prototypes are used for Experimental Method.
 It needs man power and materials
 It is time consuming and Costly Process.
2.Analytical Method
 Stress analysis for trusses, beams, and other simple
 structures are carried out based on dramatic simplification and idealization
 Design is based on the calculation results of the idealized structure & a large
safety factor (1.5-3) given by experience
ENGINEERING ANALYSIS

4. Dept of Automobile Engineering 16MET61-Finite Element Analysis 4
Numerical Methods
The problems that are involving complex material Properties and boundary
conditions, the engineer prefers numerical methods that gives approximate but
acceptable solution.
1. Functional Approximation
2. Finite Difference Method(FEM)
3. Finite Element Method
ENGINEERING ANALYSIS

5. Dept of Automobile Engineering 16MET61-Finite Element Analysis 5
FEM is found to be well suited for analyzing engineering
structure and flow problems.
It allows creating, simulating and testing of virtual
prototypes

6. Dept of Automobile Engineering 16MET61-Finite Element Analysis 6
FEA APPLICATIONS
Mechanical/Aerospace/Civil/Automotive
Engineering
Structural/Stress Analysis
Static/Dynamic
Linear/Nonlinear
Fluid Flow
Heat Transfer
Electromagnetic Fields
Soil Mechanics
Acoustics
Biomechanics

7. Dept of Automobile Engineering 16MET61-Finite Element Analysis 7
TYPES OF ANALYSIS
Static Analysis
The solution of the problem does not vary with time
Ex-stress strain analysis in beam
Dynamic Analysis
The solution of the problem does not vary with time
Ex-Fatigue and impact test
Linear Analysis
Stress is directly proportional to strain
Non Linear Analysis
Stress is not directly proportional to strain

8. Dept of Automobile Engineering 16MET61-Finite Element Analysis 8
BASIC STEPS IN FINITE ELEMENT ANALYSIS

9. Dept of Automobile Engineering 16AUT51-Automotive Chassis 9
 based on variational principles (energy methods)
 no limitation with regards to the geometry, physical composition of
the domain and type of loading
 a systematic approach that can be automated using computers
 approximate analysis by assuming displacement field, stress field, or a
combination of the two within the element.
FINITE ELEMENT METHOD – FEATURES

10. Dept of Automobile Engineering 16AUT51-Automotive Chassis 10
1. FEA has become an integral part of computer aided design
2. Simulate results on screen very quickly and conveniently
3. Time saving is quite remarkable.
4. Reliability is far more superior to those designed using
traditional methods of making the parts and assembling them.
5. FEA capabilities are more: evaluate strength and other physical
characteristics.
FINITE ELEMENT METHOD -ADVANTAGES

11. Dept of Automobile Engineering 16AUT51-Automotive Chassis 11
FEA SOFTWARES
 ANSYS
 NASTRAN
 ABAQUS
 LS-DYNA
 ADAMS
 COSMOS