About

I am an assistant professor in the department of mechanical engineering (ME) at IIT Madras (IITM).

Raushan Singh

Email: raushan@iitm.ac.in

Tel (O): +91 44 2257 4677

Office: Room No. 407, Machine Design Section, IIT Madras, Chennai-600036, India.

Research

My research broadly spans the areas of analytical and computational solid mechanics and DNA statistical mechanics. In particular, I am interested in the mechanics of flexible slender structures (e.g., cables, nanorods, DNA) at different levels of detail and application. My research projects can be classified as following four categories:


Coupled deformation in elastic tubes

Highlights

  • Pressurized circular tubes with helical anisotropy
  • Coupled extension–torsion–inflation deformation
  • Analytical expressions for stiffnesses
  • Overwinding/unwinding
  • Positive/negative Poisson’s effect

Modeling self-contact & supercoiling

Highlights

  • A singularity-free approach for modeling charged biomolecules
  • Supercoiling in charged elastic ring due to its twisting
  • Integro-differential equations & finite difference scheme
  • Equilibria of Kirchhoff & special Cosserat rods
  • Handeling self-contact in an Impenetrable rod
  • Asymptotic numerical method for cubic polynomial
  • Bifurcation diagram & perturbation technique

Mechanics of nanostructures

Highlights

  • Nonlinear constitutive relations
  • Analytical formulas of nanorod stiffnesses
  • Finite element formulation for cross-sectional deformation
  • Size-dependent mechanical properties
  • In-plane and out-of-plane warping deformation

Statistical mechanics of DNA

Highlights

  • Looping probabilities of fluctuating polymers
  • Coarse-grain modeling of DNA
  • Sequence-dependent DNA minicircle shapes
  • DNA and RNA and hybrid DNA-RNA under force
  • Importance sampling & Monte Carlo simulations
  • Clustering with machine learning techniques