Finite Element Analysis offers data to foretell how a seal product will operate under certain conditions and might help establish areas where the design could be improved without having to test a number of prototypes.
Here we explain how our engineers use FEA to design optimal sealing solutions for our customer purposes.
Why will we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing functions with complicating influences. Envelope dimension, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all application parameters that we should contemplate when designing a seal.
In isolation, the impact of these application parameters within reason simple to foretell when designing a sealing resolution. However, if you compound numerous these elements (whilst often pushing some of them to their higher limit when sealing) it is essential to predict what will occur in actual application conditions. Using FEA as a software, our engineers can confidently design after which manufacture robust, dependable, and cost-effective engineered sealing options for our prospects.
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 efficiency has been noticed and can be used to guide the design of surrounding elements; especially for products similar to diaphragms and boots the place contact with adjoining components may need to be prevented.
The software program additionally allows pressure information to be extracted so that compressive forces for static seals, and friction forces for dynamic seals could be precisely predicted to assist prospects within the final design of their products.
How can we use FEA?
Starting with a 2D or 3D mannequin of the initial design idea, we apply the boundary situations and constraints provided by a customer; these can embody pressure, pressure, temperatures, and any applied displacements. A appropriate 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 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 components. Most sealing supplies are non-linear; the amount they deflect underneath a rise in force varies depending on how large that force is. เกจวัดแรงดันน้ำไทวัสดุ is in contrast to the straight-line relationship for most metals and rigid plastics. This complicates the fabric model and extends the processing time, however we use in-house tensile test facilities to accurately produce the stress-strain material models for our compounds to ensure the evaluation is as representative of real-world performance as potential.
What happens with the FEA data?
The evaluation itself can take minutes or hours, relying on the complexity of the half and the vary of working situations being modelled. Behind the scenes within the software program, many lots of of 1000’s of differential equations are being solved.
The results are analysed by our skilled seal designers to establish areas the place the design may be optimised to match the precise requirements of the applying. Examples of these requirements may embody sealing at very low temperatures, a need to minimise friction ranges with a dynamic seal or the seal may need to withstand excessive pressures without extruding; whatever sealing system properties are most important to the client and the appliance.
Results for the finalised proposal may be introduced to the shopper as force/temperature/stress/time dashboards, numerical knowledge and animations showing how a seal performs all through the analysis. This data can be used as validation information in the customer’s system design course of.
An example of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm part for a valve utility. By utilizing FEA, we had been in a position to optimise the design; not only of the elastomer diaphragm itself, but in addition to propose modifications to the hardware elements that interfaced with it to extend the obtainable house for the diaphragm. This kept material stress ranges low to take away any chance of fatigue failure of the diaphragm over the life of the valve.
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