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• Design of products, systems, and structures demands the engineer to consider a broad range of issues. 

• The issues addressed by Mechanics of Materials are excessive deformation and material failure. A few general principles enable us to design against excessive deformation and failure for a wide range of part geometries, materials, and loadings.  

• We consider the body to be composed of elements, we study common deformation modes, and we combine contributions of each deformation mode, as needed,to assess deformation and failure.

Forces & Deformation in an Element		Excessive deformation	Material failure
Body composed of Elements	Mechanics of materials	Design against	Bulking
	Common deformation modes
Axial	Torsion	Bending