Why Ceetak makes use of Finite Element Analysis

Finite Element Analysis supplies information to foretell how a seal product will operate under sure conditions and can help identify areas the place the design can be improved with out having to check a quantity of prototypes.
Here we explain how our engineers use FEA to design optimum sealing options for our customer applications.
Why can we use Finite Element Analysis (FEA)?
Our engineers encounter many crucial sealing purposes with complicating influences. Envelope measurement, housing limitations, shaft speeds, pressure/temperature rankings and chemical media are all software parameters that we must consider when designing a seal.
In isolation, the influence of those application parameters within reason straightforward to foretell when designing a sealing answer. However, whenever you compound a selection of these components (whilst typically pushing a few of them to their upper limit when sealing) it’s essential to foretell what’s going to happen in actual application conditions. Using FEA as a software, our engineers can confidently design after which manufacture sturdy, dependable, and cost-effective engineered sealing solutions for our prospects.
Finite Element Analysis (FEA) permits us to understand and quantify the results of real-world situations on a seal half or assembly. It can be utilized to establish potential causes the place sub-optimal sealing efficiency has been observed and can also be used to information the design of surrounding parts; particularly for merchandise similar to diaphragms and boots the place contact with adjoining parts could must be prevented.
The software additionally permits drive knowledge to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals could be accurately predicted to help prospects within the ultimate design of their products.
How will we use FEA?
Starting with a 2D or 3D model of the preliminary design idea, we apply the boundary circumstances and constraints equipped by a customer; these can include strain, force, temperatures, and any applied displacements. A suitable finite factor mesh is overlaid onto the seal design. This ensures that the areas of most interest return correct outcomes. We can use bigger mesh sizes in areas with much less relevance (or decrease levels of displacement) to minimise the computing time required to unravel the model.
Material properties are then assigned to the seal and hardware components. เกจวัดแรงดันไฮดรอลิค sealing supplies are non-linear; the amount they deflect beneath an increase in force varies depending on how large that force is. This is unlike the straight-line relationship for most metals and inflexible plastics. This complicates the material mannequin and extends the processing time, however we use in-house tensile check amenities to precisely produce the stress-strain materials fashions for our compounds to make sure the evaluation is as consultant of real-world performance as potential.
What happens with the FEA data?
The evaluation itself can take minutes or hours, relying on the complexity of the part and the range of working circumstances being modelled. Behind the scenes in the software program, many hundreds of 1000’s of differential equations are being solved.
The outcomes are analysed by our experienced seal designers to identify areas where the design may be optimised to match the precise necessities of the application. Examples of these requirements could embody sealing at very low temperatures, a need to minimise friction levels with a dynamic seal or the seal may need to withstand 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 offered to the client as force/temperature/stress/time dashboards, numerical data and animations displaying how a seal performs all through the analysis. This information can be used as validation information within the customer’s system design process.
An example of FEA
Faced with very tight packaging constraints, this customer requested a diaphragm component for a valve software. By using FEA, we have been able to optimise the design; not solely of the elastomer diaphragm itself, but in addition to propose modifications to the hardware components that interfaced with it to increase the obtainable area for the diaphragm. This saved material stress levels low to remove any possibility of fatigue failure of the diaphragm over the lifetime of the valve.
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