Tuesday, December 16, 2008

Lets Talk About FEA Basics And Learn The Fundamentals Of Finite Element Analysis

Mechanical Engineers Who are looking for FEA/CAE field entry, I have great news for you guys. Learning Finite Element needs real patience and applying your knowledge in your work is full of skill. You don't have to be afraid off, I mean to say its vast area its strong engineering fundamentals and computational knowledge. FEA has entered all space of engineering and it has increased many job opportunities in the industry.

Finite Element Analysis (FEA) is a numerical technique that can he used to approximate the structural dynamic characteristics of vibrating mechanical systems, the understanding of which is paramount to any root-cause failure study involving excessive vibrations. The Finite Element technique can be used for structural dynamic studies of existing equipment or to evaluate the dynamic characteristics of machines and structures prior to fabrication. FEA models can be used to approximate "stress stiffening" effects in rotating mechanical components (e.g., fan wheels, pump rotors, motor shafts, ...

The  PDF file talks about FEA basics and it will be good start to your FEA career. It gives you immense knowledge FEA methods, different analysis types, Analysis approach, Do's And Don'ts and Many more about Finite element.

FEA Basic Documentation

There are four main  benefits, aside from potential cost savings, where FEA may provide  benefits to you, the customer.
    • Design Validation
    • Design Modification
    • OEM Compliance
    • Verifying field Failure Issues

Design Validation without Physical Testing

During the design process, typically there are several different design modifications being considered. How do you determine which modifications are the most effective without building expensive  tooling and prototypes? The simplest method is finite element analysis. FEA enables several design iterations to be tested and validated without the need for physical parts or prototypes  to be built for each iteration. This saves money and time in  the design cycle.

Design Modifications:

Does the design perform Safely??? Is the current design as mass efficient as it could be? As stiff as it needs to be? Does it perform under new or changing conditions as well as it did under the original conditions? All of these questions and  several others may be answered using FEA.

OEM Compliance:

FEA is so widely used in the automotive and other industries that design specifications often require an analysis as part of the design validation process. Even where FEA is not specifically requested, it still is a cost effective, timely solution to the design validation compliance issue.

Verifying field Failure Issues

Even with all  the testing and validating currently done before a design is put into production, situations arise which cause the part to fail in the field. When this occurs, it is often very difficult  to determine what loads caused the failure. In this situation, FEA shines. The part may be excersized the amount which caused the failure using FEA. The analysis results allow the  FEA engineer to look into the failure mode and determine what loads the part experienced. The engineer can then communicate this information to the designer. Together, they can determine which modifications are required to solve the design failure issue.