New tutorials on Pure Bending of Composite Materials are up in the Mechanics of Materials course! The 6 tutorials in this section go over how to solve basic pure bending composite material problems as well as reinforced concrete. There are two full worked examples on the pure bending of reinforced concrete. Fear not the rebar you shall, young padawon.

• Pure bending of composite materials introduced
• Pure bending of composite materials worked example #1
• Pure bending of composite materials worked example #2
• How to solve pure bending problems for reinforced concrete
• Pure bending of reinforced concrete example #1
• Pure bending of reinforced concrete example #2 

The Pure Bending section of the Mechanics of Materials course is now live! Check out these 7 new tutorials that introduce the topic and go over some examples of pure bending in the elastic range:

• Pure bending introduced
• Geometry of pure bending problems
• Stress and strain in the elastic range due to pure bending
• Moment of inertia for composite shapes
• Elastic section modulus demonstration
• Pure bending in the elastic range example #1: rectangular beam
• ​Pure bending in the elastic range example #2: T-beam

The third section of the Mechanics of Materials course is now complete! It has 8 tutorials on torsion that will teach you how to use angle of twist, shearing strain, and shearing stress to find minimum shaft dimensions and more!

• Torques and angle of twist
• Angle of twist due to torsion in a shaft with varying cross section
• Shearing strain  due to torsion in a shaft
• Shearing stress due to torsion in a solid circular shaft
• Shearing stress due to torsion in a hollow circular shaft
• Find the minimum diameter of a solid circular shaft in torsion
• ​Find the minimum inner diameter of a hollow circular shaft in torsion
• Find the maximum permissible torque for a shaft of known dimensions

Section 2 of Mechanics of Materials is now up! There are 7 tutorials on engineering strain, including some examples of both statically determinate and indeterminate problems.

• Normal strain
• Stress strain diagram explained
• Hooke's law
• Normal strain in members with varying cross-sectional area
• Use Hooke's law to find deflection in a statically determinate frame
• Introduction to statically indeterminate problems and the principle of superposition
• Find the reactions of a statically indeterminate member with varying cross section

The first section in Mechanics of Materials is now up! These 5 tutorials provide an introduction to the course by introducing various types of internal stresses and the all important factor of safety!

• Normal stress
• Normal stress in members with varying cross-sectional area
• Shearing stress
• Double shear
• Bearing stress
• Factor of safety

72 free Statics tutorials are now complete and available for everyone interested in learning the basics of Structural Engineering!

Also known as Mechanics I, this FREE university level course starts at the basics of vector addition and subtraction, and progresses through 3D statics problems, trusses, frames & machines, shear force diagrams, bending moment diagrams, and more.

The final statics section on shear force diagrams and bending moment diagrams is now complete! These tutorials introduce the positive sign convention for three different types of internal forces, and how to plot them along the length of a beam under various types of external loading. 

• Introduction to internal forces
  
• Internal force sign convention
  
• SFD & BMD example #1: single point load
  
• SFD & BMD example #2: multiple point loads
• SFD & BMD example #3: distributed loads
• SFD & BMD example #4: applied moment

The centroids and distributed loading section of the statics course in now complete! Learn how to locate the centroids of simple shapes, and use that knowledge to solve for reaction forces of beams under various distributed loads. 

• Introduction to centroids
• ​How to find the centroid of simple shapes 
• How to find the centroid of simple composite shapes
• How to find the centroid of the area under a parabola
• Distributed loading example #1: rectangular loads
• Distributed loading example #2: triangular loads
• Distributed loading example #3: parabolic loads
• Distributed loading example #4: composite shapes

6 new frames & machines tutorials are now up on the site! The tutorials cover two force members, three force members, how to draw individual free body diagrams for each member.

• How to solve frame and machine problems
• Two force members explained
• Three force members explained
• Frame example problem #1
• Frame example problem #2
• Frame example problem #3

I just finished up a new fresh set of 3D statics tutorials. Learn about the 6 equations of equilibrium and different types of support reactions.

• Reaction forces and the different types of 3D supports
• How to solve 3D statics problems
• 3D statics problem: worked example with ball/socket and cables
• 3D statics problem: worked example with hinge and cable