Why Ceetak uses Finite Element Analysis

Finite Element Analysis provides knowledge to foretell how a seal product will operate beneath sure conditions and might help identify areas where the design could be improved with out having to check multiple prototypes.
Here we clarify how our engineers use FEA to design optimal sealing solutions for our customer purposes.
Why will Moneyback use Finite Element Analysis (FEA)?
Our engineers encounter many crucial sealing applications with complicating influences. Envelope dimension, housing limitations, shaft speeds, pressure/temperature scores and chemical media are all utility parameters that we should think about when designing a seal.
In isolation, the influence of those software parameters is fairly straightforward to foretell when designing a sealing answer. However, whenever you compound a quantity of these factors (whilst typically pushing some of them to their higher limit when sealing) it is crucial to predict what will occur in actual utility conditions. Using FEA as a software, 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 know and quantify the consequences of real-world situations on a seal half or meeting. It can be utilized to establish potential causes where sub-optimal sealing performance has been observed and can be used to guide the design of surrounding parts; particularly for products such as diaphragms and boots the place contact with adjacent elements may need to be prevented.
The software additionally allows drive data to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals can be precisely predicted to assist customers within the ultimate design of their products.
How will we use FEA?
Starting with a 2D or 3D mannequin of the initial design concept, we apply the boundary conditions and constraints equipped by a customer; these can include stress, force, temperatures, and any utilized displacements. A suitable finite component mesh is overlaid onto the seal design. This ensures that the areas of most curiosity return correct outcomes. We can use bigger mesh sizes in areas with much less relevance (or decrease ranges of displacement) to minimise the computing time required to solve the mannequin.
Material properties are then assigned to the seal and hardware components. Most sealing materials are non-linear; the quantity they deflect under an increase in drive varies relying on how massive that drive is. This is not like the straight-line relationship for many metals and rigid plastics. This complicates the material mannequin and extends the processing time, but we use in-house tensile take a look at amenities to precisely produce the stress-strain materials fashions for our compounds to ensure the evaluation is as consultant of real-world performance as attainable.
What happens with the FEA data?
The evaluation itself can take minutes or hours, relying on the complexity of the half and the vary of working situations being modelled. Behind the scenes in the software, many tons of of 1000’s of differential equations are being solved.
The outcomes are analysed by our experienced seal designers to determine areas the place the design could be optimised to match the precise requirements of the application. Examples of those requirements could include sealing at very low temperatures, a have to minimise friction levels with a dynamic seal or the seal may have to face up to high pressures with out extruding; whatever sealing system properties are most important to the client and the applying.
Results for the finalised proposal could be introduced to the client as force/temperature/stress/time dashboards, numerical information and animations displaying how a seal performs all through the evaluation. This data can be utilized as validation information in the customer’s system design process.
An instance of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm part for a valve utility. By utilizing FEA, we had been in a place to optimise the design; not only of the elastomer diaphragm itself, but additionally to propose modifications to the hardware components that interfaced with it to extend the obtainable area for the diaphragm. This kept material stress ranges low to remove any risk of fatigue failure of the diaphragm over the life of the valve.
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