TRIZ Principles:     1 10     11 20     21 30     31 40

  

   

   

31

Porous materials

Make an object porous or add porous elements (inserts, coatings, etc.).

If an object is already porous, use the pores to introduce a useful substance or function.

32

Color changes

Change the color of an object or its external environment.

Change the transparency of an object or its external environment.

33

Homogeneity

Make objects interacting with a given object of the same material (or material with identical properties).

34

Discarding and recovering

Make portions of an object that have fulfilled their functions go away (discard by dissolving, evaporating, etc.) or modify these directly during operation.

Conversely, restore consumable parts of an object directly in operation.

 

 

 

 

35

Parameter changes

Change an object's physical state (e.g. to a gas, liquid, or solid.)

Change the concentration or consistency.

Change the degree of flexibility.

Change the temperature.

36

Phase transitions

Use phenomena occurring during phase transitions (e.g. volume changes, loss or absorption of heat, etc.).

37

Thermal expansion

Use thermal expansion (or contraction) of materials.

If thermal expansion is being used, use multiple materials with different coefficients of thermal expansion.

38

Strong oxidants

Replace common air with oxygen-enriched air.

Replace enriched air with pure oxygen.

Expose air or oxygen to ionizing radiation.

Use ionized oxygen.

Replace ozonized (or ionized) oxygen with ozone.

 

 

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39

Inert atmosphere

Replace a normal environment with an inert one.

Add neutral parts, or inert additives to an object.

40

Composite materials

Change from uniform to composite (multiple) materials.

 

 

 

 

 

 

 

  

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