Why Compliant Mechanisms?
Updated: Mar 30
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
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.