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Having direct contact to a material, e. g. by holding it in hands or in the mouth, consciously, but also unconsciously, we expect a certain sense of touch, a certain sensory impression or even excitation.

Examples: soft materials in the interior of a car showing the soft touch effect, handshake, keystroke; chewing gum, bread, curd, ice cream. More about haptics, see the Note in Chapter 8.3.2 (structural character, amplitude test); and about the tactile perception of a surface, see application example (d) in Chapter 10.8.4.3 (tribology).

Summary: Behavior of viscoelastic solids

Desired behavior of viscoelastic materials can be obtained only if the viscous and elastic portions are in a well-balanced ratio.

Example: Bamboo

Required behavior is given for bamboo bars only if both, flexibility (viscous behavior) and rigidity (elastic behavior) are present, showing the right mixture of both components. Only in this case, the material may show the optimal (viscoelastic) behavior. By the way: Also in East Asian nature philosophy, bamboo is an illustrative example to characterize balanced behavior or properties.

For “Mr. and Ms. Cleverly”