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Finite Element Analysis supplies information to foretell how a seal product will perform beneath certain situations and may help determine areas where the design may be improved with out having to test multiple prototypes.
Here we explain how our engineers use FEA to design optimum sealing options for our customer purposes.
Why do we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing functions with complicating influences. Envelope measurement, housing limitations, shaft speeds, pressure/temperature scores and chemical media are all software parameters that we should consider when designing a seal.
In isolation, the impression of these software parameters is reasonably easy to foretell when designing a sealing answer. However, whenever เครื่องมือที่ใช้วัดความดัน compound a variety of these factors (whilst usually pushing some of them to their upper restrict when sealing) it is essential to foretell what’s going to happen in real application conditions. Using FEA as a device, our engineers can confidently design and then manufacture robust, reliable, and cost-effective engineered sealing options for our customers.
Finite Element Analysis (FEA) permits us to grasp and quantify the consequences of real-world conditions on a seal part or assembly. It can be utilized to determine potential causes where sub-optimal sealing performance has been observed and can also be used to guide the design of surrounding elements; especially for products similar to diaphragms and boots where contact with adjoining elements may have to be prevented.
The software program additionally permits force knowledge to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals can be accurately predicted to help customers in the last design of their merchandise.
How can we use FEA?
Starting with a 2D or 3D model of the initial design idea, we apply the boundary situations and constraints equipped by a customer; these can include strain, pressure, temperatures, and any applied displacements. A appropriate finite element 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 less relevance (or lower ranges of displacement) to minimise the computing time required to solve the model.
Material properties are then assigned to the seal and hardware parts. Most sealing supplies are non-linear; the quantity they deflect beneath a rise in pressure varies relying on how giant 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, however we use in-house tensile take a look at facilities to precisely produce the stress-strain materials models for our compounds to make sure the evaluation is as representative of real-world efficiency as attainable.
What occurs with the FEA data?
The evaluation itself can take minutes or hours, depending on the complexity of the part and the range of operating conditions being modelled. Behind the scenes in the software program, many hundreds of thousands of differential equations are being solved.
The outcomes are analysed by our skilled seal designers to establish areas where the design can be optimised to match the particular requirements of the appliance. เกจวัดแรงดันไทวัสดุ of these necessities might embrace sealing at very low temperatures, a have to minimise friction ranges with a dynamic seal or the seal may have to face up to excessive pressures without extruding; whatever sealing system properties are most necessary to the customer and the application.
Results for the finalised proposal may be introduced to the customer as force/temperature/stress/time dashboards, numerical knowledge and animations displaying how a seal performs throughout the evaluation. This information can be used as validation information in the customer’s system design process.
An example of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm part for a valve software. By utilizing FEA, we have been able to optimise the design; not only of the elastomer diaphragm itself, but in addition to suggest modifications to the hardware parts that interfaced with it to extend the available area for the diaphragm. This saved materials stress levels low to take away any chance of fatigue failure of the diaphragm over the life of the valve.
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