9.4 Stress and Strain | Elasticity of Solids | General Physics скачать в хорошем качестве

9.4 Stress and Strain | Elasticity of Solids | General Physics

Chad provides a physics lesson on the Elasticity of Solids (aka the Deformation of Solids). The lesson begins with a brief review of Hooke's law for springs as it shows a similarity to the three deformation equations presented in this lesson. But instead of relating force to displacement as for a spring, the deformation equations will relate stress to strain, and instead of a spring constant, the proportionality constant is called an elastic modulus. Tensile Stress and Strain The first equation presented regarding the deformation of solids is for tensile stess and strain (stretching and compression) which involves Young's modulus. When a load is place on rope or wire, it stretches, and when a load is placed upon a column as in the construction of a building, it compresses. Young's modulus is the proportionality constant in the equation that allows us to calculate the degree of stretching and compression. Shear Stress and Strain The second equation presented regarding the deformation of solids is for the shearing of solid which involves the Shear modulus. When a force is placed upon a solid parallel to one of its faces a shearing deformation is possible. The Shear modulus is the proportionality constant in the equation that allows us to calculate the shear strain resulting from the shear strain. Bulk Stress and Strain The third equation presented regarding the deformation of solids is for volume deformation which involves the Bulk modulus. When a solid experiences an increase in the surrounding pressure, it is compressed. Likewise, if a solid experiences a decrease in the surrounding pressure, it expands. The Bulk modulus is the proportionality constant in the equation that allows us to calculate the degree of bulk strain that results from bulk stress. 00:00 Lesson Introduction 00:50 Review of Hooke's Law for Springs 02:00 Tensile Stress and Strain and Young's Modulus 08:46 Shear Stress and Strain - Shear Deformation 15:59 Bulk Stress and Strain - Volume Deformation Check out Chad's General Physics Master Course: https://www.chadsprep.com/physics-you...