Compliant Mechanisms: Principles and Design


This course introduces the concept and principles of compliant mechanisms and presents the design methods in detail. Various applications of compliant mechanisms in consumer products, microsystems, aerospace, automotive, and biomedical industries will be touched upon throughout the course. It is a comprehensive treatment of the growing field of compliant mechanisms starting from the classics and basics and ending with the state of the art.


Fourth year UG and PG level


Preferred - Kinematics; finite element analysis; optimization theory


Bosch India Ltd. EATON India Ltd. General Electric, General Motors Tata Motors, TVS Motors, L&T, Crompton-Greaves


G. K. Ananthasuresh has taught this course once and has extensive presentation material based on numerous workshops he has conducted on the subject in the US and India. The instructor has been working in this field right from the inception of the field. He is associated with it for nearly 25 years and has contributed to its development and identifying applications. He has also played a major role in defining systematic design methods for compliant mechanisms.


Week 1

Overview of compliant mechanisms; spirit of compliant design; a glimpse of applications.

Mobility analysis of compliant mechanisms: Grübler’s formula, Maxwell’s rule, and rank of the compatibility matrix

Week 2

Modeling of flexures (flexible joints or elastic pairs)

Simulation of compliant mechanisms using finite element analysis

Week 3

Large-displacement analysis of cantilever beams: the elastica approach

Pseudo Rigid-Body (PRB) modeling

Week 4

Analysis using pseudo rigid-body models

Synthesis using pseudo rigid-body models

Week 5

Structural optimization approach to “design for deflection”

Topology optimization approach to compliant mechanism design

Week 6

Designing compliant mechanisms using continuum topology optimization

Design of distributed compliant mechanisms

Week 7

Spring-lever (SL) and spring-masslever (SML) models for compliant mechanisms

Selection and re-design using SL and SML models

Week 8

Non-dimensional analysis of compliant mechanisms

Kinetoelastic maps of compliant mechanisms

Week 9

Other methods of compliant mechanisms

Mechanical advantage analysis of compliant mechanisms

Week 10

Bistable compliant mechanisms

Static balancing of compliant mechanisms

Week 11

Compliant mechanisms and microsystems

Manufacturing and materials for compliant mechanisms

Week 12

Case-studies of compliant mechanisms: Part 1

Case-studies of compliant mechanisms: Part 2

  • The exam is optional for a fee. Exams will be on 23 April 2017
  • Time: Shift 1: 9am-12 noon; Shift 2: 2pm-5pm
  • Any one shift can be chosen to write the exam for a course.
  • Registration url: Announcements will be made when the registration form is open for registrations.
  • The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published.


  • Final score will be calculated as : 25% assignment score + 75% final exam score
  • 25% assignment score is calculated as 25% of average of best 8 out of 12 assignments
  • E-Certificate will be given to those who register and write the exam and score greater than or equal to 40% final score.Certificate will have your name, photograph and the score in the final exam with the breakup. It will have the  logos of NPTEL and IISc Bangalore. It will be e-verifiable at