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Kaushik Iyer

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Materials Physicist
  • Ph.D., Materials Science & Engineering
    1997, Vanderbilt University

Iyer's work is in the area of Micrometeoroid and Orbital Debris (MMOD) Hypervelocity Impact Hazard Mitigation. Specifically, it involves development of physics-based analysis capability and engineering approaches for designing spacecraft surfaces to be able to withstand impacts at speeds that are well beyond ground test capabilities (~10 km/s), and are therefore not amenable to purely empirical or test data based treatment. A closely related and intriguing area of research is evaluation of the shielding capability of unconventional or non-ideal Whipple shields, which spacecraft often must fly with, but fall outside the scope of the existing design paradigm.

Iyer and his colleagues made notable advances in the field for NASA’s Parker Solar Probe mission, which is contending with Near Sun dust impacts at speeds as high as 300 km/s. These and other new solutions have been applied to the New Horizons and Europa Clipper missions as well. Some of this work is presented in peer-reviewed open source publications.

The field of evaluating MMOD risks to missions, specific system failure and damage modes, and providing mitigating design specifications to vulnerable systems involves a unique multi-disciplinary capability that spans expertise in spacecraft systems engineering, high-rate materials failure mechanics, mission operations, astronomy, and hypervelocity impact (HVI) shock physics. Iyer and the team at APL bring this unique capability to bear for NASA missions on an as-needed basis.

Notable Awards and Leadership

Year(s) Description
2017 Fellow of the American Society of Mechanical Engineers
2015 Outstanding Development Paper in an Externally Referred Publication: Interplanetary Dust Particle Shielding Capability of Spacecraft Multi-Layer Insulation
2013 R. W. Hart Prize for Best IR&D Research Project

Scholarly Publications

Dynamic yielding and fracture of grade 4 titanium in plate impact experiments

Journal of Applied Physics, 2016
R. L. Whelchel, D. S. Mehoke, K. A. Iyer, T. H. Sanders, N. N. Thadhani, (2016), Dynamic yielding and fracture of grade 4 titanium in plate impact experiments, Journal of Applied Physics, 119

Hypervelocity impact of a steel microsphere on fused silica sheets

International Journal of Impact Engineering, 2015
Alireza Chadegani, Kaushik A. Iyer, Douglas S. Mehoke, Romesh C. Batra, (2015), Hypervelocity impact of a steel microsphere on fused silica sheets, International Journal of Impact Engineering, 80, 116-132

Interplanetary Dust Particle Shielding Capability of Spacecraft Multilayer Insulation

Journal of Spacecraft and Rockets, 2015
Kaushik A. Iyer, Douglas S. Mehoke, Romesh C. Batra, (2015), Interplanetary Dust Particle Shielding Capability of Spacecraft Multilayer Insulation, Journal of Spacecraft and Rockets, 52, 584-594

Large-scale troughs on Vesta: A signature of planetary tectonics

Geophysical Research Letters, 2012
D. L. Buczkowski, D. Y. Wyrick, K. A. Iyer, E. G. Kahn, J. E. C. Scully, A. Nathues, R. W. Gaskell, T. Roatsch, F. Preusker, P. M. Schenk, L. Le Corre, V. Reddy, R. A. Yingst, S. Mest, D. A. Williams, W. B. Garry, O. S. Barnouin, R. Jaumann, C. A. Raymond, C. T. Russell, (2012), Large-scale troughs on Vesta: A signature of planetary tectonics, Geophysical Research Letters, 39

A Review of the Solar Probe Plus Dust Protection Approach

2012 Ieee Aerospace Conference, 2012
Douglas S. Mehoke, P. K. Swaminathan, Cesar J. Carrasco, Robert C. Brown, Gerald I. Kerley, Kaushik A. Iyer, IEEE, (2012), A Review of the Solar Probe Plus Dust Protection Approach, 2012 Ieee Aerospace Conference

Relationships between multiaxial stress states and internal fracture patterns in sphere-impacted silicon carbide

International Journal of Fracture, 2007
Kaushik A. Iyer, (2007), Relationships between multiaxial stress states and internal fracture patterns in sphere-impacted silicon carbide, International Journal of Fracture, 146, 1-18

Analysis of the size effect in partial-slip contact fatigue

Journal of Tribology-Transactions of the Asme, 2005
K Iyer, (2005), Analysis of the size effect in partial-slip contact fatigue, Journal of Tribology-Transactions of the Asme, 127, 443-446

Fatigue of single- and double-rivet self-piercing riveted lap joints

Fatigue & Fracture of Engineering Materials & Structures, 2005
K Iyer, SJ Hu, FL Brittman, PC Wang, DB Hayden, SP Marin, (2005), Fatigue of single- and double-rivet self-piercing riveted lap joints, Fatigue & Fracture of Engineering Materials & Structures, 28, 997-1007

A computational design-of-experiments study of hemming processes for automotive aluminium alloys

Proceedings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture, 2005
G Lin, K Iyer, SJ Hu, W Cai, SP Marin, (2005), A computational design-of-experiments study of hemming processes for automotive aluminium alloys, Proceedings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture, 219, 711-722

Prediction of electrical contact resistance for anisotropic conductive adhesive assemblies

Ieee Transactions on Components and Packaging Technologies, 2004
M Chin, KA Iyer, SJ Hu, (2004), Prediction of electrical contact resistance for anisotropic conductive adhesive assemblies, Ieee Transactions on Components and Packaging Technologies, 27, 317-326

Peak contact pressure, cyclic stress amplitudes, contact semi-width and slip amplitude: relative effects on fretting fatigue life

International Journal of Fatigue, 2001
K Iyer, (2001), Peak contact pressure, cyclic stress amplitudes, contact semi-width and slip amplitude: relative effects on fretting fatigue life, International Journal of Fatigue, 23, 193-206

Solutions for contact in pinned connections

International Journal of Solids and Structures, 2001
K Iyer, (2001), Solutions for contact in pinned connections, International Journal of Solids and Structures, 38, 9133-9148

Analyses of contact pressure and stress amplitude effects on fretting fatigue life

Journal of Engineering Materials and Technology-Transactions of the Asme, 2001
K Iyer, S Mall, (2001), Analyses of contact pressure and stress amplitude effects on fretting fatigue life, Journal of Engineering Materials and Technology-Transactions of the Asme, 123, 85-93

Influence of interference and clamping on fretting fatigue in single rivet-row lap joints

Journal of Tribology-Transactions of the Asme, 2001
K Iyer, CA Rubin, GT Hahn, (2001), Influence of interference and clamping on fretting fatigue in single rivet-row lap joints, Journal of Tribology-Transactions of the Asme, 123, 686-698

Effects of cyclic frequency and contact pressure on fretting fatigue under two-level block loading

Fatigue & Fracture of Engineering Materials & Structures, 2000
K Iyer, S Mall, (2000), Effects of cyclic frequency and contact pressure on fretting fatigue under two-level block loading, Fatigue & Fracture of Engineering Materials & Structures, 23, 335-346

Analysis of fatigue and fretting of three-dimensional, single and double rivet-row lap joints

Icaf 97: Fatigue in New and Ageing Aircraft, Vols I and Ii, 1997
K Iyer, PC Bastias, CA Rubin, GT Hahn, R Cook, P Poole, (1997), Analysis of fatigue and fretting of three-dimensional, single and double rivet-row lap joints, Icaf 97: Fatigue in New and Ageing Aircraft, Vols I and Ii, 855-869

ANALYSIS OF FRETTING CONDITIONS IN PINNED CONNECTIONS

Wear, 1995
K IYER, GT HAHN, PC BASTIAS, CA RUBIN, (1995), ANALYSIS OF FRETTING CONDITIONS IN PINNED CONNECTIONS, Wear, 181, 524-530