Why Ceetak makes use of Finite Element Analysis

Finite Element Analysis provides information to foretell how a seal product will operate underneath certain situations and can help determine areas the place the design can be improved without having to test multiple prototypes.
Here we clarify how our engineers use FEA to design optimum sealing options for our buyer applications.
Why do we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing purposes with complicating influences. Envelope measurement, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all utility parameters that we should consider when designing a seal.
In isolation, the impact of those application parameters is fairly simple to predict when designing a sealing solution. However, if you compound a variety of these components (whilst often pushing a few of them to their upper limit when sealing) it is essential to predict what is going to happen in actual software conditions. Using FEA as a tool, our engineers can confidently design after which manufacture sturdy, reliable, and cost-effective engineered sealing solutions for our customers.
Finite Element Analysis (FEA) permits us to understand and quantify the consequences of real-world situations on a seal half or meeting. It can be utilized to determine potential causes the place sub-optimal sealing performance has been observed and can additionally be used to guide the design of surrounding elements; particularly for products similar to diaphragms and boots where contact with adjoining elements might have to be prevented.
Bonus permits drive knowledge to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals could be precisely predicted to help clients in the last design of their products.
How do we use FEA?
Starting with a 2D or 3D model of the initial design concept, we apply the boundary circumstances and constraints supplied by a customer; these can include strain, drive, temperatures, and any applied displacements. A appropriate finite component mesh is overlaid onto the seal design. This ensures that the areas of most interest return correct outcomes. We can use larger mesh sizes in areas with less relevance (or lower ranges 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 materials are non-linear; the quantity they deflect underneath a rise in drive varies depending on how giant that pressure is. This is in distinction to the straight-line relationship for many metals and inflexible plastics. This complicates the material mannequin and extends the processing time, but we use in-house tensile check services to precisely produce the stress-strain materials fashions for our compounds to ensure the analysis is as representative of real-world performance as possible.
What happens with the FEA data?
The analysis itself can take minutes or hours, relying on the complexity of the part and the vary of operating situations being modelled. Behind the scenes within the software, many lots of of 1000’s of differential equations are being solved.
The results are analysed by our skilled seal designers to establish areas where the design may be optimised to match the specific requirements of the appliance. Examples of these requirements could include sealing at very low temperatures, a have to minimise friction ranges with a dynamic seal or the seal might have to withstand high pressures without extruding; whatever sealing system properties are most important to the shopper and the appliance.
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 data can be utilized as validation data within the customer’s system design process.
An instance of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm element for a valve software. By using FEA, we had been capable of optimise the design; not only of the elastomer diaphragm itself, but also to suggest modifications to the hardware components that interfaced with it to extend the out there house for the diaphragm. This stored material stress levels low to remove any chance of fatigue failure of the diaphragm over the life of the valve.

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