Materials and simple structures - part 2

This is a basic module on the physical properties of materials and on techniques for dimensioning mechanically simple components or systems.

Material properties are covered using tensile testing, binary diagrams and microstructure.

Component dimensioning involves selecting the most suitable material and defining the geometry to ensure static and fatigue strength. Dimensional analysis can also be used to determine the characteristics of a more complex system, based on experiments carried out on a scale model.

• Apply dimensional analysis to study a system based on measurements taken on a model,
• Know the main classes of materials and their specific features,
• Determine the mechanical properties of a material from a tensile test, the basic test for materials mechanics,
• Determining the most suitable material for a given application (using Ashby diagrams)
• Dimension a simple part so that it remains in its elastic range (Tresca criterion) and ensures its fatigue life for non-symmetrical loading (Goodmann criterion), while taking into account the phenomenon of stress concentration.

Kinematics and statics of the undeformable solid

Basic mathematics

Notion of deformation of solids

Assessment of knowledge :

0.2*TP+0.8*max(0.5*CC1+0.5*Ex ; Ex)

• Units, dimensional analysis, similarity and uncertainties,
• Material classes and specific characteristics,
• Tensile test,
• Choice of materials and introduction to eco-design,
• Equivalent stress and fatigue sizing, taking stress concentrations into account.