Why Ceetak uses Finite Element Analysis

Finite Element Analysis supplies data to foretell how a seal product will operate under certain circumstances and can help identify areas where the design could be improved without having to check a quantity of prototypes.
Here we explain how our engineers use FEA to design optimal sealing solutions for our buyer functions.
Why will we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing applications with complicating influences. Envelope size, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all application parameters that we must consider when designing a seal.
In isolation, the impression of these utility parameters within reason easy to predict when designing a sealing answer. However, when you compound a selection of these components (whilst often pushing some of them to their higher restrict when sealing) it’s essential to predict what will happen in real software conditions. Using FEA as a device, our engineers can confidently design after which manufacture sturdy, reliable, and cost-effective engineered sealing solutions for our clients.
Finite Element Analysis (FEA) allows us to grasp and quantify the results of real-world circumstances on a seal part or meeting. It can be used to identify potential causes the place sub-optimal sealing efficiency has been observed and may also be used to information the design of surrounding components; particularly for products such as diaphragms and boots the place contact with adjoining components may have to be averted.
The software program additionally allows force information to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals may be accurately predicted to help clients within the ultimate design of their products.
How can we use FEA?
Starting with a 2D or 3D mannequin of the initial design concept, we apply the boundary circumstances and constraints equipped by a buyer; these can embody strain, pressure, temperatures, and any utilized displacements. A appropriate finite element mesh is overlaid onto the seal design. This ensures that the areas of most curiosity return accurate outcomes. We can use bigger mesh sizes in areas with less relevance (or decrease ranges of displacement) to minimise the computing time required to solve 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 force varies relying on how giant that drive is. This is in contrast to the straight-line relationship for most metals and rigid plastics. Hilarious complicates the material model and extends the processing time, however we use in-house tensile take a look at services to accurately produce the stress-strain materials fashions for our compounds to make sure the evaluation is as consultant of real-world efficiency as possible.
What occurs with the FEA data?
The evaluation itself can take minutes or hours, relying on the complexity of the half and the vary of operating situations being modelled. Behind the scenes in the software, many lots of of thousands of differential equations are being solved.
The outcomes are analysed by our experienced seal designers to establish areas the place the design could be optimised to match the particular necessities of the applying. Examples of these requirements might include sealing at very low temperatures, a have to minimise friction ranges with a dynamic seal or the seal may have to withstand high pressures with out extruding; whatever sealing system properties are most necessary to the shopper and the applying.
Results for the finalised proposal can be offered to the client as force/temperature/stress/time dashboards, numerical knowledge and animations showing how a seal performs all through the analysis. This info can be utilized as validation data in the customer’s system design process.
An example of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm element for a valve utility. By using Covert , we had been able to optimise the design; not solely of the elastomer diaphragm itself, but in addition to propose modifications to the hardware parts that interfaced with it to extend the obtainable area for the diaphragm. This stored material stress levels low to take away any possibility of fatigue failure of the diaphragm over the life of the valve.
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