• Aparna Patil

Why Compliant Mechanisms?

Updated: Mar 30

Crimping mechanism

One of the most important reasons why compliant mechanisms are preferred over traditional ones is the dramatic reduction in the number of parts needed to attain the visualized motion and the desired result.

Other compelling reasons are:

Easier assembly

Lighter in weight

Less friction resulting in lower maintenance


Precision in motion

Superior performance

Reduction in size

Higher reliability

Simpler production process

Adaptability to morphing, lamina emergent, and adaptive motion

Available in miso, micro, and Nano sizes

Ease of manufacturing because of the nature of materials used

Example of crimping mechanism

It is possible to manufacture some mechanisms in a single piece from material that is injection-moldable. Shown in the figure above is the fully compliant crimping mechanism along with its pseudo rigid-body model (Only half the mechanism is shown since the other half is symmetrical). It is evident that the compliant mechanism requires far fewer components than the rigid mechanism. This can significantly reduce assembly time and manufacturing cost. The ability of compliant mechanisms to function on fewer components and joints are also an advantage in the fabrication of micro mechanisms. Materials similar to those used in the fabrication of integrated circuits can be used to fabricate complaint micro mechanisms.

Fewer components also mean lesser weight, making compliant mechanisms significantly more important in applications like aerospace and surgery. Manufacturing companies also benefit from these light-weight mechanisms as they result in a reduction in shipping cost.

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