Why Ceetak makes use of Finite Element Analysis

Finite Element Analysis offers data to foretell how a seal product will function underneath certain circumstances and may help establish areas the place the design could be improved without having to check multiple prototypes.
Here we clarify how our engineers use FEA to design optimum sealing solutions for our customer functions.
Why do we use Finite Element Analysis (FEA)?
Our engineers encounter many important 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 impact of those application parameters is reasonably straightforward to foretell when designing a sealing resolution. However, if you compound numerous these components (whilst typically pushing some of them to their higher restrict when sealing) it’s crucial to foretell what is going to occur in actual utility situations. Using FEA as a tool, our engineers can confidently design after which manufacture robust, dependable, and cost-effective engineered sealing solutions for our clients.
Finite Element Analysis (FEA) allows us to know and quantify the results of real-world circumstances on a seal half or meeting. It can be utilized to identify potential causes the place sub-optimal sealing performance has been observed and may additionally be used to guide the design of surrounding components; particularly for products such as diaphragms and boots where contact with adjoining elements may need to be avoided.
The software also permits pressure 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 within the final design of their products.
How do we use FEA?
Starting with a 2D or 3D mannequin of the initial design concept, we apply the boundary circumstances and constraints supplied by a buyer; these can embrace pressure, 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 results. We can use larger mesh sizes in areas with much less relevance (or decrease ranges of displacement) to minimise the computing time required to resolve the model.
Material properties are then assigned to the seal and hardware elements. Most sealing materials are non-linear; the amount they deflect underneath an increase in pressure varies depending on how large that drive is. This is not like the straight-line relationship for most metals and inflexible plastics. เกจวัดแรงดันถังแก๊ส complicates the material mannequin and extends the processing time, however we use in-house tensile check amenities to precisely produce the stress-strain material models for our compounds to ensure the analysis is as representative of real-world performance as potential.
What happens with the FEA data?
The analysis itself can take minutes or hours, relying on the complexity of the half and the range of operating situations being modelled. Behind the scenes within the software, many tons of of hundreds of differential equations are being solved.
The outcomes are analysed by our experienced seal designers to establish areas the place the design may be optimised to match the specific requirements of the application. Examples of those requirements might include sealing at very low temperatures, a have to minimise friction levels with a dynamic seal or the seal may have to resist high pressures with out extruding; no matter sealing system properties are most essential to the shopper and the application.
Results for the finalised proposal may be offered to the customer as force/temperature/stress/time dashboards, numerical information and animations exhibiting how a seal performs throughout the analysis. This info can be utilized as validation information in the customer’s system design course of.
An instance of FEA
Faced with very tight packaging constraints, this customer requested a diaphragm part for a valve utility. By using FEA, we were able to optimise the design; not solely of the elastomer diaphragm itself, but in addition to suggest modifications to the hardware components that interfaced with it to extend the obtainable space for the diaphragm. This saved materials stress levels low to remove any risk of fatigue failure of the diaphragm over the life of the valve.
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