#  Strength of Materials and Properties of Matter 

 



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### Shear

\[M | t+ | —\]  
Rubber sheet model.

### Torsion

\[S/M | t | —\]  
Rubber tube and wooden slat models are twisted.

### Spiral Fracture

\[M | t | ★★★\]   
Realistic leg-in-ski-boot accident.  
  
\[[In-Depth Description](/presentations/spiral-fracture)\]

### Buckling

\[M | t | —\]  
Wooden slat is compression loaded to buckling point.

### Paper Rod vs Tube Strength

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### Coke Can Strength

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An empty Coke can can support the weight of a person standing on it, notwithstanding that the walls of aluminum are only a couple of thousandths of an inch thick. But it buckles readily!!

### Egg Shell Strength

\[L | t++ | ★★★\]  
Eggs have a reputation for being quite strong under compressional loads. You won't believe your eyes when you see how strong they are.

\[[In-Depth Description](/presentations/egg-shell-strength)\]

### Fracture Strength of Chalk

\[M | t+ | ★\]  
Chalk rod subjected to tensile and compressive loads.   
  
\[[In-Depth Description](/presentations/fracture-strength-chalk)\]

### Creep of Lead

\[M | t+ | ★\]  
Lead rod subjected to tensile load.  
  
\[[In-Depth Description](/presentations/creep-lead)\]

### Foam Rubber Beams

\[S| t+ | —\]  
The structural strength of these I-beams is easily made evident with small loads.

### Hooke's Law and Young's Modulus

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Both can be determined by stretching a long wire with weights.

### Collapsible Cow

\[L | t+ | ★★★\]  
Scaling of wooden cow, simply and Nature's way.   
  
\[[In-Depth Description](/presentations/collapsible-cow)\]

### Contact Us

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