: General relationships between stress, strain, and deformation; plane stress/strain; and torsion in non-circular sections. Plasticity

The theory of elasticity and plasticity is a fundamental concept in mechanics of materials, which deals with the behavior of materials under various types of loading. The theory provides a mathematical framework for understanding the response of materials to external forces, and it has numerous applications in engineering, physics, and other fields. In this article, we will provide an overview of the theory of elasticity and plasticity, and we will also discuss how to access a free PDF version of the book "Theory of Elasticity and Plasticity" by Jane Helena.

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