The behavior of any physical system can be defined mathematically. Solving these mathematical equations allows for the analysis of the system’s behavior. Depending on the complexity of the equation, finding solutions directly may not be straightforward. Finite element analysis is an approximation technique to transform the mathematical representation of a physical system into a set
Friction is an important concept taught in every introductory physics class. However, it is commonly ignored or overlooked when solving physics problems or when performing FEA. In this blog, we will go through what friction is and how we can utilize it in FEA. What Exactly Is Friction? Friction is the resistance encountered when objects
Finite element analysis (FEA) has significantly transformed the approach of engineers and scientists to design and analyze various physical systems. It has emerged as a formidable tool for enhancing designs and detecting possible problems by providing valuable insights into system behavior without the need for costly and time-consuming physical prototypes. However, while simulating physical system
Random vibrations subject a component to non-deterministic motion which cannot be analyzed precisely. The mode shapes and natural frequencies remain the same for the component and randomness is an inherent characteristic of the input excitation. They present a significant challenge to engineers trying to meet design margins. Some examples for random vibrations are: Automobile driving
Frequency is an important aspect for mechanical systems, which can be used to predict the behavior of systems under different dynamic conditions. The reliability and performance of the mechanical systems can be optimized, and potential design issues can be identified by analyzing its frequency response. Every physical system has natural frequencies associated with it, which
Typically, as you make your mesh finer, your stress converges to its nominal value (see this blog for an example!). However, this may not always be the case. Below we have a round shaft loaded in tension with different mesh sizes: As you can see, as the mesh gets finer, the maximum stress continues to
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The ability of any material to carry mechanical, thermal, or electrical loads is limited. Permanent damage occurs to the material when it is loaded beyond its capacity to recover. When the material is subjected to external loading, the atoms and/or molecules move and rearrange causing strain. If the strain is within elastic limit, the material
Contacts are an essential part of model definitions in a multibody analysis. These problems are commonly encountered in engineering scenarios such as assemblies with moving parts like seals, gears, pins, punches, rollers, bearings etc. Once contact occurs between two bodies, they can interact in different ways. Bonded, friction, frictionless, no separation, rough contact are a
Meshing is a fundamental aspect of Finite Element Analysis (FEA) in which large, complex geometries are discretized into a set of simple, interconnected elements. Put plainly, complex shapes are divided into smaller, simpler shapes using finite elements. Because mesh size, element type, and element quality all directly affect the accuracy and reliability of an FEA
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