Welcome back to the Efficient Engineer channel everyone! In this video we’re going to talk about Young’s modulus, one of the three main elastic constants along with shear modulus and bulk modulus, which are used to describe how a material …

# Category: Mechanics of Materials

*bookmark_border*Understanding Viscosity

Thanks to CuriosityStream for sponsoring this video. Everyone has an intuitive understanding of what the **viscosity** of a fluid is. Honey is more viscous than oil, and oil is more viscous than water. Viscous fluids feel thicker, and don’t flow …

*bookmark_border*Understanding Aerodynamic Lift

Thanks to CuriosityStream for sponsoring this video. Since well before the first Wright brothers flight in 1903, and all the way to the present day, mankind has been fascinated by taking to the skies. Once thought to be impossible, heavier-than-air …

*bookmark_border*Understanding Bernoulli’s Equation

Thanks to CuriosityStream for sponsoring this video. Watch thousands of documentaries and get access to Nebula for free, when you sign up using the link in the description. Bernoulli’s **equation** is a simple but incredibly important **equation i**n physics …

*bookmark_border*Understanding Laminar and Turbulent Flow

This video from The Efficient Engineer is sponsored by Brilliant. One of the very first things you learn in fluid mechanics is the difference between laminar and **turbulent flow**. And for good reason – these two flow regimes behave …

*bookmark_border*Understanding Fatigue Failure and S-N Curves

Components which are subjected to loading which varies with time can fail at stresses well below the material’s ultimate strength. This is known as **fatigue failure** and it accounts for the vast majority of mechanical engineering failures worldwide. The bolts …

*bookmark_border*Understanding the Deflection of Beams

Thanks to Brilliant for sponsoring this video. **Beams** are used to carry loads in a whole range of different structures, and it’s important for engineers to be able to predict how much a beam will deflect when loads are …

*bookmark_border*Understanding Stresses in Beams

If we apply a load to a beam, it will deform by bending. This generates internal stresses, which can be represented by a shear force acting in the vertical direction, and a bending moment. The shear force is the resultant …

*bookmark_border*Understanding Stress Transformation and Mohr’s Circle

In this video we’re going to take a look at **stress transformation** and Mohr’s circle. Let’s start by reminding ourselves about the stress element. The stress element is a useful way of describing the stresses acting at a single point …

*bookmark_border*Understanding Plane Stress

Analyzing solid mechanics problems in three dimensions can be really hard work, and it can get very complicated very fast. Fortunately in a lot of cases there are some simplifications we can use to reduce a three-dimensional problem to a …