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Interactive engineering courseware

Engineering fundamentals, made visible.

Clear theory, worked examples, live models and practice problems for the core first- and second-year engineering courses, from statics and strength of materials to circuits and thermodynamics. Free, with no sign-up, and ready to drop into your lesson plan.

Start with strength of materials For lecturers
6
engineering branches
23
topics ready, 59 in the syllabus
23
interactive models
0
sign-ups needed
10 kN 20 kN 10 kN tension compression L = 8 m

Choose a branch

Six branches, one consistent way of learning

Each branch follows a syllabus-style outline. Every finished topic has the same parts, so you always know where to look.

Featured course

Strength of Materials

The backbone of civil and mechanical design: how bars, shafts, beams and columns carry load, and when they fail. Built as a sequence of short topics that follow the usual university order.

  • Axial, torsion and bending
  • Shear force and bending moment diagrams
  • Stress transformation and Mohr’s circle
  • Buckling of columns
Open the course

Module 1Stress and Strain

Module 2Axial and Torsional Loading

Module 3Beams

Module 4Combined Loading and Stability

See it move

Models you can push around

Change a load, a span or a section and watch the reactions, diagrams and stresses update straight away. This is the model from the topic Shear force and bending moment diagrams. Every topic has one, and each can be opened full screen or embedded in your own slides or learning platform.

  • Works on a phone, tablet or projector
  • Numbers shown with units and sign conventions
  • Checked against textbook solutions
Try it nowAdd a point load, a UDL, or both. Switch to a cantilever to see how the diagrams change.

This interactive model needs JavaScript.

How each topic works

Read it, play with it, then prove it

1

Learn the idea

Short, careful theory with the equations in proper notation, plus a note on the usual mistakes.

2

Work an example

A full worked example with given data, steps and a sense-check on the answer.

3

Explore the model

A live model lets you vary the inputs and see the effect before you touch a calculator.

4

Practise

Problems with answers hidden until you want them, then a summary of the key formulae.

For lecturers

Built to be used in a lesson plan

Each topic carries suggested timing, an in-class activity and discussion questions. Link to a topic, embed a model, or print a page. Your students do not need accounts.

See the lecturer guide
  • Lecturer notesSuggested plan, activity and assessment idea on every topic.
  • Embed any modelOne line of HTML puts a live model in your LMS or course page.
  • Print-readyClean printing for handouts, and a one-page formula sheet.
  • Stable linksEvery topic and model has its own address you can put in a syllabus.
  • Mobile firstDesigned for the phones most students actually use.
  • No data collectedNo sign-up and no personal data, in line with the NDPA 2023.

Formula quick reference

The equations you reach for most

Each links to the topic where it is derived and used. The full formula sheet is printable.

Hooke's lawσ=Eε\sigma = E\varepsilonNormal and shear stress, strainFlexure formulaσ=MyI\sigma = \frac{My}{I}Bending stress: the flexure formulaAngle of twistφ=TLGJ\phi = \frac{TL}{GJ}Torsion of circular shaftsSimply supported, central point loadδmax=PL348EI\delta_{\text{max}} = \frac{PL^3}{48EI}Beam deflectionEuler critical loadPcr=π2EI(KL)2P_{\text{cr}} = \frac{\pi^2 EI}{(KL)^2}Buckling of columns (Euler)Principal stressesσ1,2=σx+σy2±(σx−σy2)2+τxy2\sigma_{1,2} = \frac{\sigma_x + \sigma_y}{2} \pm \sqrt{\left(\frac{\sigma_x - \sigma_y}{2}\right)^2 + \tau_{xy}^2}Stress transformation and Mohr's circle

About the content

Topics follow the common first- and second-year engineering sequence, but syllabuses differ between institutions, so check each topic against your own course outline. The models use standard textbook assumptions (linear elastic material, small deflections, ideal fluids and gases) and are teaching aids, not design software. Branches marked planned show where the site is heading; they have no page yet.