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Professor Albert To

Group Members

Research Highlights

Publications

Facilities

Senior Design Projects

Group Events

 

Journal Publications

Additive Manufacturing / 3D Printing | Metamaterials & Phononic Crystals | Piezoelectrics

Nanoporous Metals | Carbon Nanotube Structures | Nanowires

Atomistic/Continuum Theory & Modeling | Finite Elements/Meshfree Methods | Acoustic Emission | Miscellaneous

Additive Manufacturing / 3D Printing
  1. J. Liu and A. C. To, "Topology optimization for multi-directional additive manufacturing," (under review)
  2. X. Wang, P. Zhang, E. Biyikli, and A. C. To, "Natural frequency optimization of 3D printed variable-density honeycomb structure via a homogenization-based approach," (under review)
  3. Y. Onur Yildiz, H. Zeinalabedini, P. Zhang, M. Kirca, A. C. To, "Homogenization of additive manufactured polymeric foams with spherical cells," (under review)
  4. Q. Yang, P. Zhang, L. Cheng, M. Zheng, M. Chyu, and A. C. To, "Finite element modeling and validation of thermomechanical behavior of Ti-6Al-4V in laser metal deposition additive manufacturing," (under review).
  5. P. Zhang and A. C. To, "Transversely isotropic hyperelastic-viscoplastic model for glassy polymers with application to additve manufactured photopolymers," International Journal of Plasticity, 2016, (in press). http://www.sciencedirect.com/science/article/pii/S074964191500217X
  6. E. Biyikli and A. C. To, "Proportional Topology Optimization: A new non-sensitivity method for solving stress constrained and minimum compliance problems and its implementation in MATLAB," PLOS ONE, 10, e0145041, 2015. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0145041
  7. P. Zhang, M. Heyne, and, A. C. To, “Biomimetic staggered composites with highly enhanced energy dissipation: modeling, 3D printing, and testing,” Journal of Mechanics and Physics of Solids, 83, 285-300, 2015, 2015. http://www.sciencedirect.com/science/article/pii/S0022509615300053
  8. P. Zhang, J. Toman, Y. Yu, E. Biyikli, M. Kirca, M. Chmielus, and A. C. To, “Efficient design-optimization of variable-density hexagonal cellular structure by additive manufacturing: Theory and validation," ASME Journal of Manufacturing Science and Engineering, 137, 021004, 2015.. http://manufacturingscience.asmedigitalcollection.asme.org/article.aspx?articleid=1913682
  9. X. Wang, E. Biyikli, and A. C. To, “Proportional topology optimization method for natural frequency optimization of 3D printed parts,” Proceedings of the American Society of Precision Engineering (ASPE) Spring Topical Meeting -- Achieving Precision Tolerances in Additive Manufacturing, pg 32-35, Rayleigh, NC, April 26-29, 2015. http://aspe.net/publications/Spring_2015/Spring2015.pdf
  10. L. Cheng, P. Zhang, E. Biyikli, J. Bai, S. Pilz, and A. C. To, "Integration of topology optimization with efficient design of additive manufactured cellular structures," Proceedings of the Solid Freeform Fabrication (SFF) Conference, Austin, TX, August 10-12, 2015. http://sffsymposium.engr.utexas.edu/sites/default/files/2015/2015-110-Cheng.pdf

Atomistic/Continuum Theory & Modeling

  1. Q. Yang and A. C. To, "Multiresolution molecular mechanics: a unified and consistent framework for general finite element shape functions," Computer Methods in Applied Mechanics and Engineering, 283, 384-418, 2015. http://www.sciencedirect.com/science/article/pii/S0045782514003545
  2. E. Biyikli, Q. Yang, and A. C. To, “Multiresolution molecular mechanics: dynamics,” Computer Methods in Applied Mechanics and Engineering, 274, 42-55, 2014. http://www.sciencedirect.com/science/article/pii/S0045782514000589
  3. Y. Fu and A. C. To, “A modification to Hardy’s thermomechanical theory that conserves fundamental properties more accurately: Tensile and shear failures in iron,” Modeling and Simulation in Materials Science and Engineering, 22, 015010, 2014. http://iopscience.iop.org/0965-0393/22/1/015010
  4. Q. Yang, E. Biyikli, and A. C. To, “Multiresolution molecular mechanics: convergence and error structure analysis,” Computer Methods in Applied Mechanics and Engineering, 269, 20-45, 2014. http://www.sciencedirect.com/science/article/pii/S0045782513002648
  5. Y. Fu and A. C. To, "A modification to Hardy's thermomechanical theory that conserves fundamental properties more accurately," Journal of Applied Physics, 113, 233505, 2013. http://scitation.aip.org/content/aip/journal/jap/113/23/10.1063/1.4811450
  6. Y. Fu and A. C. To, "On the evaluation of Hardy’s thermomechanical quantities using ensemble and time averaging,” Modeling and Simulation in Materials Science and Engineering, 21, 055015, 2013. http://iopscience.iop.org/0965-0393/21/5/055015/
  7. Q. Yang, E. Biyikli, and A. C. To, “Multiresolution molecular mechanics: statics,” Computer Methods in Applied Mechanics and Engineering, 258, 26-38, 2013. http://www.sciencedirect.com/science/article/pii/S004578251300025X
  8. Q. Yang, E. Biyikli, P. Zhang, R. Tian, and A. C. To, “Atom collocation method,” Computer Methods in Applied Mechanics and Engineering, 237-240, 67-77, 2012. http://www.sciencedirect.com/science/article/pii/S0045782512001582
  9. Y. Fu, M. Kirca, and A. C. To, "On determining the thermal state of individual atoms in molecular dynamics simulations of nonequilibrium processes in solids," Chemical Physics Letters, 506, 290-297, 2011. http://www.sciencedirect.com/science/article/pii/S0009261411002636
  10. A. C. To, Y. Fu, W. K. Liu, "Denoising methods for thermomechanical decomposition for quasi-equilibrium molecular dynamics simulations," Computer Methods in Applied Mechanics and Engineering, 200, 1979-1992, 2011. http://www.sciencedirect.com/science/article/pii/S0045782511001095
  11. A. C. To, W. K. Liu, G. B. Olson, T. Belytschko, W. Chen, M. Shephard, Y.-W. Chung, R. Ghanem, P. W. Voorhees, D. N. Seidman, C. Wolverton, J. S. Chen, B. Moran, A. J. Freeman, R. Tian, X. Luo, E. Lautenschlager, D. Challoner, “Materials integrity in microsystems: a framework for a petascale predictive-science based multiscale modeling and simulation system,” Computational Mechanics, 42, 485-510, 2008. http://link.springer.com/article/10.1007%2Fs00466-008-0267-1
  12. A. C. To, W. K. Liu, and A. Kopacz, "A finite temperature continuum theory based on interatomic potential in crystalline solids," Computational Mechanics, 42, 531-541, 2008. http://link.springer.com/article/10.1007%2Fs00466-007-0239-x
  13. S. Li, X. Liu, A. Agrawal, and A. C. To, "Perfectly matched multiscale simulations for discrete lattice systems: Extension to multiple dimensions," Physical Review B, 74, 045418, 2006. http://prb.aps.org/abstract/PRB/v74/i4/e045418
  14. A. C. To and S. Li, "Perfectly matched multiscale simulations," Physical Review B, 72, 035414, 2005. http://prb.aps.org/abstract/PRB/v72/i3/e035414

Metamaterials & Phononic Crystals

  1. P. Zhang and A. C. To, “Point group symmetry and deformation induced symmetry breaking of superlattice materials,” Proceedings A of the Royal Society, 471, 0125, 2015.
  2. X. Mu, L. Wang, X. Yang, P. Zhang, A. C. To, and T. Luo, “Ultra-low thermal conductivity in Si/Ge hierarchical superlattice nanowires,” Scientific Reports, 2015, accepted.
  3. P. Zhang, M. Heyne, and, A. C. To, “Biomimetic staggered composites with highly enhanced energy dissipation: modeling, 3D printing, and testing” Journal of Mechanics and Physics of Solids, 2015 (in press) http://www.sciencedirect.com/science/article/pii/S0022509615300053
  4. P. Zhang and A. C. To, “Highly enhanced damping figure of merit in biomimetic hierarchical staggered composites,” ASME Journal of Applied Mechanics, 81, 051015, 2014. http://appliedmechanics.asmedigitalcollection.asme.org/article.aspx?articleid=1789878
  5. P. Zhang and A. C. To, "Broadband wave filtering of bioinspired hierarchical phononic crystal," Applied Physics Letters, 102, 121910, 2013. http://scitation.aip.org/content/aip/journal/apl/102/12/10.1063/1.4799171
  6. B. J. Lee and A. C. To. “Enhanced absorption in one-dimensional phononic crystals with interfacial acoustic waves,” Applied Physics Letters, 95, 031911, 2009. http://scitation.aip.org/content/aip/journal/apl/95/3/10.1063/1.3182819
  7. S. Gonella, A. C. To, and W. K. Liu, “Interplay between phononic bandgaps and piezoelectric microstructures for energy harvesting,” Journal of Mechanics and Physics of Solids, 57, 621-633, 2009. http://www.sciencedirect.com/science/article/pii/S0022509608001919

Nanoporous Metals

  1. A. Giri, J. Tao, M. Kirca, and A. C. To, “Compressive behavior and deformation mechanism of nanoporous open-cell foam with ultrathin ligaments,” Journal of Micromechanics and Nanomechanics, 4, SPECIAL ISSUE: Mechanics of Nanocomposites and Nanostructure, A4013012, 2014. http://ascelibrary.org/doi/abs/10.1061/(ASCE)NM.2153-5477.0000079
  2. A. Giri, J. Tao, M. Kirca, and A. C. To, “Mechanics of nanoporous metals,” in Handbook of Micromechanics and Nanomechanics, edited by S. Li and X. L. Gao (Pan Stanford, Singapore), pp. 827-862, 2013. http://www.crcpress.com/product/isbn/9789814411233
  3. A. C. To, J. Tao, M. Kirca, and L. Schalk, "Ligament and joint sizes govern softening in nanoporous aluminum," Applied Physics Letters, 98, 051903, 2011. http://scitation.aip.org/content/aip/journal/apl/98/5/10.1063/1.3549858
  4. A. Datta, A. Srirangarajan, U. V. Waghmare, U. Ramamurty, and A. C. To, "Surface effects on stacking fault and twin formation in fcc nanofilms: a first-principles study," Computational Materials Science, 50, 3342-3345. 2011. http://www.sciencedirect.com/science/article/pii/S0927025611003685

Carbon Nanotube Structures

  1. C. Baykasoglu, Z. Ozturk, M. Kirca, A. T. Celebi, A. Mugan, and A. C. To, “Effect of lithium doping on hydrogen storage capacity of heat welded random CNT network structure,” International Journal of Hydrogen Energy, 2015, accepted.
  2. Z. Ozturk, C. Baykasoglu, A. T. Celebi, M. Kirca, A. Mugan, A. C. To, "Hydrogen storage in heat welded random CNT network structures," International Journal of Hydrogen Energy, 40, 403-411, 2015. http://www.sciencedirect.com/science/article/pii/S0360319914030742
  3. X. Yang, Y. Huang, L. Wang, Z. Han, and A. C. To, "Carbon nanotube-fullerene hybrid nanostructures by C60 bombardment: formation and mechanical behavior," Physical Chemistry Chemical Physics, 16, 21615, 2014. http://pubs.rsc.org/en/content/articlelanding/2014/cp/c4cp02620a#!divAbstract
  4. X. Yang, Y. Huang, L. Wang, Z. Han, and A. C. To, "Nanobuds promote heat welding of carbon nanotubes at experimentally-relevant temperatures," RSC Advances, 4, 56313-56317, 2014. http://pubs.rsc.org/en/content/articlelanding/2014/ra/c4ra08890e#!divAbstract
  5. A. T. Celebi, M. Kirca, C. Baykasoglu, A. Mugan, and A. C. To, “Tensile behavior of heat welded CNT network structures,” Computational Materials Science, 88, 14-12, 2014. http://www.sciencedirect.com/science/article/pii/S092702561400144X
  6. X. Yang, D. Chen, Z. Han, and A. C. To, “Effects of welding on thermal conductivity of randomly oriented carbon nanotube networks,” International Journal of Heat and Mass Transfer, 70, 803-810, 2014. http://www.sciencedirect.com/science/article/pii/S0017931013010351
  7. D. Mohammadyani, H. Modarress, A. C. To, A. Amani, ”Interactions of fullerenes (C60) and its hydroxyl derivatives with lipid bilayer: a coarse-grained molecular dynamic simulation,” Brazilian Journal of Physics, 44, 1-7, 2014. http://link.springer.com/article/10.1007%2Fs13538-013-0172-8
  8. X. Yang, D. Chen, Y. Du, and A. C. To, “Heat conduction in extended X-junctions of single-walled carbon nanotubes,” Journal of Physics and Chemistry of Solids, 2013, 75, 123-129, 2014. http://www.sciencedirect.com/science/article/pii/S0022369713003193
  9. M. Kirca, X. Yang, and A. C. To, “A stochastic algorithm for modeling heat welded random carbon nanotube network,” Computer Methods in Applied Mechanics and Engineering, 259, 1-9, 2013. http://www.sciencedirect.com/science/article/pii/S0045782513000467
  10. X. Yang, F. Qiao, P. Zhang, X. Zhu, D. Chen, and A. C. To, “Coalescence of parallel finite length single-walled carbon nanotubes by heat treatment,” Journal of Physics and Chemistry of Solids, 74, 436-440, 2013. http://www.sciencedirect.com/science/article/pii/S0022369712003411
  11. E. Biyikli, J. Liu, X. Yang, and A. C. To, "A fast method for generating atomistic models of arbitrary-shaped carbon graphitic nanostructures," RSC Advances, 3, 1359-1362, 2013. http://pubs.rsc.org/en/content/articlelanding/2012/ra/c2ra22598k#!divAbstract
  12. X. Yang, Z. Han, Y. Li, D. Chen, P. Zhang, and A. C. To, "Heat welding of non-orthogonal X-junction of single-walled carbon nanotubes," Physica E, 46, 30-32, 2012. http://www.sciencedirect.com/science/article/pii/S1386947712003219
  13. X. Yang, P. Zhang, Z. Han, D. Chen, and A. C. To, “Transformation of non-orthogonal X-junction of single-walled carbon nanotubes into parallel junction by heating,” Chemical Physics Letters, 547, 42-46, 2012. http://www.sciencedirect.com/science/article/pii/S0009261412009098
  14. B. A. Stormer, N. M. Piper, X. Yang, J. Tao, Y. Fu, M. Kirca, and A. C. To, "Mechanical properties of SWNT X-junctions through molecular dynamics simulation," International Journal of Smart and Nano Materials, 3, 33-46, 2012. (invited paper) http://www.tandfonline.com/doi/full/10.1080/19475411.2011.640361#.UozyF8Ssh8E
  15. N. M. Piper, Y. Fu, J. Tao, X. Yang, and A. C. To, "Vibration promotes heat welding of single-walled carbon nanotubes," Chemical Physics Letters, 502, 231-234, 2011. http://www.sciencedirect.com/science/article/pii/S0009261410016556
  16. A. Datta, M. Kirca, Y. Fu, and A. C. To, "Surface structure and properties of functionalized nanodiamonds: a first-principles study," Nanotechnology, 22, 065706, 2011. http://iopscience.iop.org/0957-4484/22/6/065706/

Nanowires

  1. X. Yang, A. C. To, and M. Kirca, "Thermal conductivity of periodic array of intermolecular junctions of silicon nanowires," Physica E, 44, 141-145, 2011. http://www.sciencedirect.com/science/article/pii/S138694771100289X
  2. X. Yang, A. C. To, and R. Tian, “Anomalous heat conduction behavior in thin finite-size silicon nanowires,” Nanotechnology, 21, 155704, 2010. http://iopscience.iop.org/0957-4484/21/15/155704/
  3. Y. Hu, A. C. To, and M. Yun, “Controlled growth of single metallic and conducting polymer nanowire via gate-assisted electrodeposition,” Nanotechnology, 20, 285605, 2009. http://iopscience.iop.org/0957-4484/20/28/285605

Piezoelectrics

  1. S. Gonella, A. C. To, and W. K. Liu, “Interplay between phononic bandgaps and piezoelectric microstructures for energy harvesting,” Journal of Mechanics and Physics of Solids, 57, 621-633, 2009. http://www.sciencedirect.com/science/article/pii/S0022509608001919
  2. A. C. To, S. Li, and S. D. Glaser, "Propagation of a mode-III interfacial conductive crack along a conductive interface between two piezoelectric materials," Wave Motion, 43, 368–386, 2006. http://www.sciencedirect.com/science/article/pii/S0165212506000072
  3. S. Li, A. C. To, and S. D. Glaser, "On scattering in a piezoelectric medium by a conducting crack," ASME Journal of Applied Mechanics, 72, 943–954, 2005. http://appliedmechanics.asmedigitalcollection.asme.org/mobile/article.aspx?articleid=1415492
  4. A. C. To, S. Li, and S. D. Glaser, "On scattering in dissimilar piezoelectric materials by an interfacial crack," Quarterly Journal of Mechanics and Applied Mathematics, 58, 309–331, 2005. http://qjmam.oxfordjournals.org/content/58/2/309.abstract

Finite Elements/Meshfree Methods

  1. E. Biyikli, J. Liu, X. Yang, and A. C. To, "A fast method for generating atomistic models of arbitrary-shaped carbon graphitic nanostructures," RSC Advances, 3, 1359-1362, 2013. http://pubs.rsc.org/en/content/articlelanding/2012/ra/c2ra22598k#!divAbstract
  2. R. Tian, A. C. To, and W. K. Liu, "Conforming local meshfree method," International Journal for Numerical Methods in Engineering, 86, 335-357, 2011. http://onlinelibrary.wiley.com/doi/10.1002/nme.3067/abstract
  3. X. Yin, W. Chen, A. C. To, C. McVeigh, W. K. Liu, “Statistical volume element method for predicting microstructure constitutive property relations,” Computer Methods in Applied Mechanics and Engineering, 197, 3516-3529, 2008. http://www.sciencedirect.com/science/article/pii/S0045782508000339
  4. Y. Liu, W. K. Liu, T. Belytschko, N. A. Patankar, A. C. To, A. Kopacz, and J.-H. Chung, "Immersed electrokinetic finite element method," International Journal for Numerical Methods in Engineering, 71, 379–405, 2007. http://link.springer.com/article/10.1007%2Fs00466-012-0806-7

Acoustic Emission

  1. A. C. To, J. R. Moore, and S. D. Glaser, “Wavelet denoising techniques with applications to experimental geophysical data,” Signal Processing, 89, 144-160, 2009. http://www.sciencedirect.com/science/article/pii/S0165168408002442
  2. A. C. To, and S. D. Glaser, "Full waveform inversion of a 3-D source inside an artificial rock," Journal of Sound and Vibration, 285, 835–857, 2005. http://www.sciencedirect.com/science/article/pii/S0022460X04007205
  3. J. Ching, A. C. To, and S. D. Glaser, "Microseismic source deconvolution: Bayes vs. Wiener, Fourier vs. wavelets, and linear vs. nonlinear," Journal of Acoustical Society of America, 115, 3048–3058, 2004. http://escholarship.org/uc/item/1sf5f3kf#page-1

Miscellaneous

  1. S. D. Chambreau, G. L. Vaghjiani, A. C. To, C. Koh, D. Strasser, O. Kostko, and S. R. Leone. “Heats of vaporization of room temperature ionic liquids by tunable vacuum ultraviolet photoionization,” Journal of Physical Chemistry B, 114, 1361-1367, 2010. http://pubs.acs.org/doi/abs/10.1021/jp909423m
  2. A. C. To, H. Ernst, and H. H. Einstein, "Lateral load capacity of drilled shafts in jointed rock," ASCE Journal of Geotechnical and Geoenvironmental Engineering, 129, 711–726, 2003. http://ascelibrary.org/doi/abs/10.1061/(ASCE)1090-0241(2003)129%3A8(711)

Total Journal Publications: 56

 

Book Chapters

  1. M. Kirca and A. C. To, "Mechanics of CNT Network Materials,” in Advanced Computational Nanomechanics, edited by N. Silvestre (Wiley, New York), to appear.
  2. A. Giri, J. Tao, M. Kirca, and A. C. To, “Mechanics of nanoporous metals,” in Handbook of Micromechanics and Nanomechanics, edited by S. Li and X. L. Gao (Pan Stanford, Singapore), 827-862, 2013. http://www.crcpress.com/product/isbn/9789814411233
  3. Y. Fu and A. C. To, "Application of many-realization molecular dynamics method to understand the physics of nonequilibrium processes in solids," in Multiscale Simulations and Mechanics of Biological Materials, edited by S. Li and D. Qian, (Wiley, New York), 59-76, 2013. http://onlinelibrary.wiley.com/doi/10.1002/9781118402955.ch4/summary