44 citations · 128 across the 12 of their papers we have counts for
12 papers
Dynamic fragmentation of residually stressed solids: From microscopic instabilities to universal scaling
Vineet Dawara, Koushik Viswanathan
The dynamic fragmentation of residually stressed solids involves a complex interplay between stored elastic energy, stress wave propagation, and crack instabilities. In this work,…
Synthetic space bricks from lunar and martian regolith via sintering
Nitin Gupta, Vineet Dawara, Aloke Kumar +1
The prospect of establishing extra-terrestrial habitats using in situ resource utilization (ISRU) constitutes a long-term goal of multiple space agencies around the world. In this…
Design of a low-velocity impact framework for evaluating space-grade materials
Vineet Dawara, Ashok Bajantri, Harish Singh Dhami +2
Material deformation and failure under impact loading is a subject of active investigation in space science and often requires very specialized equipment for testing. In this work,…
Fifty years of Schallamach waves: From rubber friction to nanoscale fracture
Koushik Viswanathan, Srinivasan Chandrasekar
The question of how soft polymers slide against hard surfaces is of significant scientific interest, given its practical implications. Specifically, such sytems commonly show inter…
Porosity governs failure in bioconsolidated space bricks
Vineet Dawara, Nitin Gupta, Arjun Dey +2
Understanding the mechanical response and failure of consolidated extra-terrestrial soils requires analyses of the interactions between propagating cracks the material's inherent p…
Of fiery sparks & glittering spots: Melting-resolidification and spherical particle formation in abrasion
Harish Singh Dhami, Priti Ranjan Panda, Koushik Viswanathan
The curious occurrence of perfectly spherical particles when a steel substrate is slid against a hard abrasive was first observed and documented by Robert Hooke in the 17 ce…
Opposite moving detachment waves mediate stick-slip friction at soft interfaces
Mohammad Aaquib Ansari, Koushik Viswanathan
Intermittent motion, called stick--slip, is a friction instability that commonly occurs during relative sliding of two elastic solids. In adhesive polymer contacts, where elasticit…
Shear bands in materials processing: Understanding the mechanics of flow localization from Zener's time to the present
Koushik Viswanathan, Shwetabh Yadav, Dinakar Sagapuram
Shear banding is a material instability in large strain plastic deformation of solids, where otherwise homogeneous flow becomes localized in narrow micrometer-scale bands. Shear ba…
Distinct stick-slip modes in adhesive polymer interfaces
Koushik Viswanathan, Narayan K. Sundaram
Stick-slip, manifest as intermittent tangential motion between two solids, is a well-known friction instability that occurs in a number of natural and engineering systems. In the c…
Kinematic flow patterns in slow deformation of a dense granular material
Koushik Viswanathan, Anirban Mahato, Tejas G. Murthy +2
The kinematic flow pattern in slow deformation of a model dense granular medium is studied at high resolution using \emph{in situ} imaging, coupled with particle tracking. The defo…
The nucleation and propagation of solitary Schallamach waves
Koushik Viswanathan, Anirban Mahato, Srinivasan Chandrasekar
We isolate single Schallamach waves --- detachment fronts that mediate inhomogeneous sliding between an elastomer and a hard surface --- to study their creation and dynamics. Based…
Geometric treatment of conduction electron scattering by crystal lattice strains and dislocations
Koushik Viswanathan, Srinivasan Chandrasekar
A theory for conduction electron scattering by inhomogeneous crystal lattice strains is developed, based on the differential geometric treatment of deformations in solids. The resu…