Finite Element Analysis offers knowledge to foretell how a seal product will function under sure situations and may help identify areas the place the design could be improved without having to check a number of prototypes.
Here we clarify how our engineers use FEA to design optimal sealing options for our buyer functions.
Why can we use Finite Element Analysis (FEA)?
Our engineers encounter many crucial sealing functions with complicating influences. Envelope dimension, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all software parameters that we should think about when designing a seal.
In isolation, the impression of these utility parameters is reasonably straightforward to predict when designing a sealing solution. However, when you compound a selection of these components (whilst usually pushing a few of them to their higher restrict when sealing) it’s crucial to predict what will occur in actual utility situations. Using FEA as a tool, our engineers can confidently design after which manufacture sturdy, reliable, and cost-effective engineered sealing options for our customers.
Finite Element Analysis (FEA) allows us to grasp and quantify the effects of real-world conditions on a seal half or assembly. It can be utilized to establish potential causes where sub-optimal sealing performance has been noticed and can also be used to information the design of surrounding elements; particularly for products corresponding to diaphragms and boots where contact with adjacent components may have to be averted.
The software additionally permits force knowledge to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals can be accurately predicted to help prospects within the final design of their products.
How will we use FEA?
Starting with a 2D or 3D mannequin of the preliminary design idea, we apply the boundary situations and constraints equipped by a customer; these can embrace strain, pressure, temperatures, and any utilized displacements. A suitable finite factor mesh is overlaid onto the seal design. เกจวัดแรงดันแก๊สlpgรถยนต์ ensures that the areas of most curiosity return accurate results. We can use larger mesh sizes in areas with much less relevance (or lower levels of displacement) to minimise the computing time required to resolve the model.
Material properties are then assigned to the seal and hardware components. Most sealing supplies are non-linear; the amount they deflect underneath an increase in pressure varies depending on how massive that force is. This is not like the straight-line relationship for many metals and inflexible plastics. This complicates the fabric mannequin and extends the processing time, but we use in-house tensile check amenities to accurately produce the stress-strain material models for our compounds to make sure the analysis is as representative of real-world efficiency as potential.
What occurs with the FEA data?
The analysis itself can take minutes or hours, relying on the complexity of the part and the range of operating situations being modelled. Behind the scenes within the software program, many hundreds of thousands of differential equations are being solved.
The results are analysed by our experienced seal designers to determine areas where the design can be optimised to match the precise requirements of the application. Examples of those requirements might include sealing at very low temperatures, a have to minimise friction ranges with a dynamic seal or the seal may need to face up to excessive pressures with out extruding; no matter sealing system properties are most important to the customer and the application.
Results for the finalised proposal may be presented to the shopper as force/temperature/stress/time dashboards, numerical data and animations exhibiting how a seal performs throughout the analysis. This info can be used as validation knowledge in the customer’s system design process.
An instance of FEA
Faced with very tight packaging constraints, this customer requested a diaphragm component for a valve application. By utilizing FEA, we were able to optimise the design; not solely of the elastomer diaphragm itself, but also to suggest modifications to the hardware components that interfaced with it to extend the out there space for the diaphragm. This saved materials stress ranges low to take away any possibility of fatigue failure of the diaphragm over the life of the valve.
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