Introduction to Finite
Element Analysis (FEA)
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The Finite Element Analysis
(FEA) is a numerical method for solving
problems of engineering and mathematical physics.
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Useful for problems with complicated geometries, loadings, and material properties where analytical solutions can not be obtained.
The Purpose of FEA
1.Design is based on the calculation results of the idealized
structure & a large safety factor (1.5-3) given by experience.
2.Stress analysis for trusses, beams, and other simple structures are carried out based on dramatic simplification and idealization:
– mass concentrated at the center of gravity
– beam simplified as a line segment (same cross-section)
3.Design geometry is a lot more complex; and the accuracy requirement is a lot higher. We need
– To understand the physical behaviors of a complex object (strength, heat transfer capability, fluid flow, etc.)
– To predict the performance and behavior of the design; to calculate the safety margin; and to identify the weakness of the design accurately; and
– To identify the optimal design with confidence
Principle of FEA
The finite element method (FEM ) ,or finite element analysis (FEA) , is a computational technique used to obtain approximate solution of boundary value problems in engineering .
Boundary value problems are also called field problems .the field is the domain of interest and most often represents a physicals structures
the field variables are the dependent variables of interest governed by the differential equation
the boundary conditions are the specified values of the filed variables ( or related variables such as derivatives ) on the boundaries of the field
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| Axial stress |
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| axial stress |
here are some example FEA reports done by me
Contacts
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