Finite Element Analysis offers data to predict how a seal product will function beneath sure situations and can help identify areas where the design may be improved without having to check a quantity of prototypes.
Here we clarify how our engineers use FEA to design optimal sealing solutions for our buyer purposes.
Why will we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing functions with complicating influences. Envelope measurement, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all application parameters that we must contemplate when designing a seal.
In isolation, the impression of these utility parameters is fairly straightforward to predict when designing a sealing resolution. However, whenever you compound numerous 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 device, our engineers can confidently design and then manufacture strong, dependable, and cost-effective engineered sealing solutions for our prospects.
Finite Element Analysis (FEA) permits us to know and quantify the effects of real-world conditions on a seal half or assembly. It can be used to establish potential causes where sub-optimal sealing performance has been observed and can be used to guide the design of surrounding elements; especially for products similar to diaphragms and boots where contact with adjoining elements could have to be avoided.
The software program also allows force data to be extracted so that compressive forces for static seals, and friction forces for dynamic seals can be accurately predicted to help prospects within the ultimate design of their merchandise.
How will we use FEA?
Starting with a 2D or 3D mannequin of the initial design concept, we apply the boundary conditions and constraints supplied by a customer; these can embrace pressure, force, temperatures, and any applied displacements. A appropriate finite component 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 much less relevance (or decrease levels of displacement) to minimise the computing time required to unravel the mannequin.
Material properties are then assigned to the seal and hardware elements. เกจวัดแรงลม sealing supplies are non-linear; the quantity they deflect underneath an increase in force varies depending on how large that drive is. This is unlike the straight-line relationship for most metals and rigid plastics. This complicates the material mannequin and extends the processing time, but we use in-house tensile check amenities to accurately produce the stress-strain material fashions for our compounds to make sure the analysis is as consultant of real-world efficiency 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 circumstances being modelled. Behind the scenes in the software, many tons of of thousands of differential equations are being solved.
The results are analysed by our experienced seal designers to establish areas the place the design can be optimised to match the specific necessities of the applying. Examples of those requirements might include sealing at very low temperatures, a need to minimise friction ranges with a dynamic seal or the seal might have to face up to high pressures with out extruding; no matter sealing system properties are most necessary to the client and the application.
Results for the finalised proposal could be presented to the shopper as force/temperature/stress/time dashboards, numerical data and animations displaying how a seal performs all through the evaluation. This information can be used as validation data 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 utility. By utilizing FEA, we had been capable of 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 house for the diaphragm. This saved material stress ranges low to take away any risk of fatigue failure of the diaphragm over the lifetime of the valve.