Finite Element Analysis supplies information to predict how a seal product will perform underneath sure conditions and can help determine areas where the design may be improved with out having to check a number of prototypes.
Here เครื่องมือที่ใช้วัดความดันคือ explain how our engineers use FEA to design optimal sealing solutions for our buyer functions.
Why do we use Finite Element Analysis (FEA)?
Our engineers encounter many important sealing purposes with complicating influences. Envelope dimension, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all utility parameters that we must contemplate when designing a seal.
In isolation, the impact of these software parameters is reasonably simple to foretell when designing a sealing solution. However, when you compound numerous these factors (whilst often pushing some of them to their higher limit when sealing) it’s essential to predict what’s going to occur in actual software circumstances. Using FEA as a device, our engineers can confidently design after which manufacture robust, reliable, and cost-effective engineered sealing options for our prospects.
Finite Element Analysis (FEA) permits us to grasp and quantify the effects of real-world circumstances on a seal part or meeting. It can be used to establish potential causes the place sub-optimal sealing efficiency has been noticed and can be used to information the design of surrounding elements; particularly for merchandise similar to diaphragms and boots where contact with adjacent elements could must be avoided.
The software additionally allows drive data to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals could be accurately predicted to assist prospects in the final design of their merchandise.
How will we use FEA?
Starting with a 2D or 3D model of the initial design idea, we apply the boundary circumstances and constraints supplied by a customer; these can include pressure, force, temperatures, and any applied displacements. A suitable finite component mesh is overlaid onto the seal design. This ensures that the areas of most interest return correct outcomes. We can use larger mesh sizes in areas with less relevance (or lower ranges of displacement) to minimise the computing time required to unravel the mannequin.
Material properties are then assigned to the seal and hardware parts. Most sealing materials are non-linear; the quantity they deflect beneath an increase in pressure varies depending on how giant that force is. This is unlike the straight-line relationship for most metals and inflexible plastics. This complicates the fabric mannequin and extends the processing time, however we use in-house tensile test services to accurately produce the stress-strain materials models for our compounds to ensure the analysis is as representative of real-world efficiency as attainable.
What happens with the FEA data?
The evaluation itself can take minutes or hours, relying on the complexity of the part and the vary of working situations being modelled. Behind the scenes within the software, many lots of of hundreds of differential equations are being solved.
The results are analysed by our skilled seal designers to identify areas where the design can be optimised to match the precise requirements of the application. Examples of those necessities may embody sealing at very low temperatures, a need to minimise friction levels with a dynamic seal or the seal might have to face up to high pressures without extruding; no matter sealing system properties are most essential to the client and the application.
Results for the finalised proposal could be presented to the shopper as force/temperature/stress/time dashboards, numerical knowledge and animations displaying how a seal performs throughout the evaluation. This data can be utilized as validation data in the customer’s system design process.
An instance of FEA
Faced with very tight packaging constraints, this customer requested a diaphragm part for a valve application. By using FEA, we had been in a position to optimise the design; not solely of the elastomer diaphragm itself, but in addition to suggest modifications to the hardware parts that interfaced with it to extend the obtainable area for the diaphragm. This saved material stress ranges low to remove any possibility of fatigue failure of the diaphragm over the life of the valve.