Understanding Stresses in Beams

From “The Efficient Engineer”. ( YouTube / Nebula ) In this video we explore bending and shear stresses in beams. A bending moment is the resultant of bending stresses, which are normal stresses acting perpendicular to the beam cross-section. We can easily derive an equation for these bending stresses by observing how a beam deforms…

Understanding and Analysing Trusses

From “The Efficient Engineer”. ( YouTube / Nebula ) In this video we’ll take a detailed look at trusses. Trusses are structures made of up slender members, connected at joints which can be approximated to pinned connections. It is typically assumed that loads are applied to the joints of the truss, not directly to the…

Understanding the Area Moment of Inertia

From “The Efficient Engineer”. ( YouTube / Nebula ) The area moment of inertia (also called the second moment of area) defines the resistance of a cross-section to bending, due to the shape of the cross-section. It is a key parameter for the analysis of beams and columns. In this video I take a detailed…

Understanding True Stress and True Strain

From “The Efficient Engineer”. ( YouTube / Nebula ) Did you know that the typical stress-strain curve obtained from a uniaxial tensile test is just an approximation? It doesn’t consider the fact that the dimensions of the test specimen change throughout the duration of the tensile test. In this video I cover the interesting topic…

Understanding Torsion

From “The Efficient Engineer”. ( YouTube / Nebula ) In this video we will explore torsion, which is the twisting of an object caused by a moment. It is a type of deformation. A moment which tends to cause twisting is called torque. Some of the things covered in this video include how circular bars…