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Improving Transmission Durability through CAE

 

The Benefits of Improved Transmission Durability

  • Reduced Warranty Costs: Increasing the durability of a component or system will reduce the frequency of failures and thus the warranty costs incurred by the company to replace failed parts.
  • Reduced Cost of Ownership: increasing the life of a product means fewer visits to the service centre by the customer to replace worn out parts
  • Increased Selling Price: a product that is known for reliability can demand a premium price in the market

Challenges to Improving Engine Durability

  • Changing performance targets: the transmission or component will be in a constant state of development to improve one or more of the following: efficiency, torque capacity, weight, durability, cost, size.
  • New applications: the transmission will be tried in different applications to increase sales volumes either within or across industry segments for example passenger vehicle to small commercial vehicle or across industries for example stationary (power generation) to automotive or automotive to marine.
  • New environments: the transmission may be sold in different geographical markets to increase sales.  These may have significantly different operating temperatures, air densities (altitude) or air compositions (pollution) than the home market.
  • New duty cycles: new customers may introduce more severe usage patterns for example the police or military environment

The Importance of Design Verification using CAE
Whenever a design is changed, for whatever reason, it is essential that the product is tested either physically or virtually to determine whether it will survive the loading conditions it experiences in the field. For example a weight reduction exercise could result in smaller shaft diameters. This could have a negative impact on bearing life through increased shaft deflections. This outcome can be minimised through good design based on a solid understanding of structural mechanics fundamentals.

As discussed in the Transmission page Durability CAE simulation allows the engineer to verify relatively quickly and cheaply whether the revised product still meets its durability targets. To read more about the benefits of CAE click here.

When improving durability is the main design objective then CAE simulation can be performed to check any negative consequences on any of the other attributes including weight, NVH, thermal, efficiency, and torque capacity. For example increasing the fatigue safety factors in a shift fork can increase material thicknesses which may increase weight. Again this outcome can be mitigated through good design based on a solid understanding of structural mechanics fundamentals and advanced problem and product specific simulation tools.

The Caepro Advantage
Caepro has performed durability CAE on all the major components of the transmission both individually and as an assembly. This includes both low and high-cycle fatigue. See one of our Transmission Durability Case Studies.  Our deep product knowledge and experience enables us to:

  • Understand your objectives for the product
  • Prepare a model optimised for calculation speed and accuracy
  • Apply appropriate boundary conditions
  • Perform simulation using world-class procedures and tools
  • Make sensible recommendations for design improvements
  • Minimise any negative impact on other attributes

To get more information or to request a quote for transmission durability CAE please submit an enquiry. For more on why Caepro is the best partner for your outsourced CAE requirements please read our 9 Reasons for Using Caepro article.

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