1. Classic procedures

1.1 Design types

Although design is not the subject of this article, it may be useful to recall that the context of material choice is different [114] depending on whether the design is variation, adaptive or innovative.

• Variation design: this involves making a change in size, shape or performance without changing the principle; changing from stresses to forces, modifying dimensions, etc., can lead to material changes.

  Example

  For example, automobile engine connecting rods are subjected to compression and traction forces. They are mass-produced (several million parts a year in a variety of materials):...