Finite Element Analysis offers information to predict how a seal product will function beneath sure conditions and may help identify areas the place the design may be improved with out having to check a quantity of prototypes.
Here we clarify how our engineers use FEA to design optimal sealing options 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 application parameters that we should think about when designing a seal.
In isolation, the influence of these software parameters within reason straightforward to foretell when designing a sealing answer. However, whenever you compound a number of these factors (whilst often pushing a few of them to their upper restrict when sealing) it’s essential to foretell what goes to happen in real application situations. Using FEA as a software, our engineers can confidently design after which manufacture sturdy, reliable, and cost-effective engineered sealing solutions for our clients.
Finite Element Analysis (FEA) allows us to understand and quantify the consequences of real-world conditions on a seal half or meeting. It can be utilized to determine potential causes the place sub-optimal sealing performance has been observed and may also be used to guide the design of surrounding parts; especially for merchandise corresponding to diaphragms and boots where contact with adjoining components could have to be averted.
The software additionally allows force data to be extracted so that compressive forces for static seals, and friction forces for dynamic seals may be accurately predicted to help clients in the last design of their products.
How will we use FEA?
Starting with a 2D or 3D model of the initial design concept, we apply the boundary conditions and constraints supplied by a buyer; these can embody pressure, 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 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 parts. Most sealing supplies are non-linear; the quantity they deflect under an increase in pressure varies depending on how giant that pressure is. This is unlike the straight-line relationship for many metals and rigid plastics. This complicates the material model and extends the processing time, but we use in-house tensile test services to precisely produce the stress-strain material fashions for our compounds to make sure the analysis is as consultant of real-world efficiency as potential.
What happens with the FEA data?
เพรสเชอร์เกจน้ำ can take minutes or hours, depending on the complexity of the half and the vary of working situations being modelled. Behind the scenes within the software, many lots of of thousands of differential equations are being solved.
เครื่องมือที่ใช้วัดความดันเลือด are analysed by our skilled seal designers to establish areas where the design can be optimised to match the particular necessities of the applying. Examples of those necessities may include sealing at very low temperatures, a must minimise friction levels with a dynamic seal or the seal may need to face up to high pressures with out extruding; no matter sealing system properties are most essential to the shopper and the appliance.
Results for the finalised proposal can be offered to the shopper as force/temperature/stress/time dashboards, numerical data and animations exhibiting how a seal performs all through the evaluation. This info can be utilized as validation knowledge within the customer’s system design process.
An example of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm component for a valve application. By using FEA, we have been able to optimise the design; not only of the elastomer diaphragm itself, but also to propose modifications to the hardware elements that interfaced with it to increase the available area for the diaphragm. This stored material stress levels low to remove any possibility of fatigue failure of the diaphragm over the life of the valve.
Share