Finite Element Analysis supplies information to predict how a seal product will operate underneath certain circumstances and can help establish areas the place the design may be improved without having to test multiple prototypes.
Here we clarify how our engineers use FEA to design optimum sealing solutions for our buyer functions.
Why do we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing functions with complicating influences. Envelope dimension, housing limitations, shaft speeds, pressure/temperature scores and chemical media are all software parameters that we must think about when designing a seal.
In isolation, the impression of those software parameters is fairly straightforward to foretell when designing a sealing resolution. However, if you compound numerous these components (whilst often pushing some of them to their higher limit when sealing) it’s crucial to foretell what’s going to occur in actual software situations. Using FEA as a software, our engineers can confidently design and then manufacture robust, dependable, and cost-effective engineered sealing solutions for our customers.
Finite Element Analysis (FEA) permits us to know and quantify the results of real-world conditions on a seal part or assembly. It can be used to identify potential causes where sub-optimal sealing performance has been noticed and can additionally be used to guide the design of surrounding components; especially for products such as diaphragms and boots the place contact with adjacent elements may have to be avoided.
The software program also permits force information to be extracted so that compressive forces for static seals, and friction forces for dynamic seals can be precisely predicted to help clients within the ultimate design of their merchandise.
How do we use FEA?
Starting with a 2D or 3D mannequin of the preliminary design idea, we apply the boundary conditions and constraints provided by a buyer; these can embody stress, drive, temperatures, and any utilized displacements. A suitable finite factor mesh is overlaid onto the seal design. This ensures that the areas of most curiosity return accurate outcomes. We can use larger mesh sizes in areas with much less relevance (or lower levels of displacement) to minimise the computing time required to unravel the model.
Material properties are then assigned to the seal and hardware parts. Most sealing supplies are non-linear; the quantity they deflect underneath an increase in drive varies depending on how giant that pressure is. This is unlike the straight-line relationship for many metals and inflexible plastics. This complicates the material model and extends the processing time, however we use in-house tensile take a look at facilities to precisely produce the stress-strain materials models for our compounds to ensure the evaluation is as consultant of real-world performance as possible.
What occurs with the FEA data?
The evaluation itself can take minutes or hours, relying on the complexity of the part and the range of working conditions being modelled. Behind the scenes in the software program, many lots of of 1000’s of differential equations are being solved.
เกจวัดแรงดันเชื้อเพลิง are analysed by our experienced seal designers to determine areas where the design can be optimised to match the particular requirements of the application. Examples of these necessities may include sealing at very low temperatures, a need to minimise friction levels with a dynamic seal or the seal might have to withstand high pressures with out extruding; whatever sealing system properties are most essential to the client and the application.
Results for the finalised proposal can be offered to the customer as force/temperature/stress/time dashboards, numerical knowledge and animations displaying how a seal performs all through the analysis. This info can be utilized as validation knowledge within the customer’s system design process.
An instance of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm component for a valve software. By utilizing FEA, we have been capable of optimise the design; not only of the elastomer diaphragm itself, but also to suggest modifications to the hardware parts that interfaced with it to increase the out there area for the diaphragm. This saved material stress ranges low to take away any chance of fatigue failure of the diaphragm over the life of the valve.
Share