Massachusetts Institute of Technology

PhD Mech. Engng.

2006

Chinese Academy of Sciences 

M.S. Mechanics

2000

Beijing University, China

B.S. Mechanics

1997

(a)

Stable and unstable plastic deformation mechanisms in amorphous materials with different structural length scales, at different temperature and loading rates. Propagation and multiplication of shear bands in amorphous solids

(b)

Mechanical deformation behavior in nanocrystalline metals, thin films, nanointerconnects and ceramics, in particular to develop more faithful physical based understanding and modeling strategy for grain boundaries in nanocrystalline metals and ceramics; and develop methods on modeling the reliability of small-scale structures where mechanics and mass diffusion are coupled; and investigate the mechanical behavior in metals under the influence of diffusion, corrosion, and deformation.

(c)

Mechanical behavior in biosystems and biomaterials, the mechanical behavior of extra-cellular matrix, the strengthening and toughening mechanisms in bio-structured materials, dynamics of molecular bonds

(e)

Mechanics and deformation in hexagonal close-packed materials (hcp), lightweight metallic alloys and composite materials

An integrated research approach including experiments, theory development, continuum level computation, and atomistic scale simulation, is applied to those problems

01/10--

Professor, Institute of Mechanics, Chin. Acad. Sci.

01/09--12/09

Assistant Prof., Mech. Engng, Univ. of Alabama

03/06--12/08

Postdoc, Engineering Division, Brown University

(With Prof. Huajian Gao and Prof. Allan Bower)

07/01--06/06

Research Assistant, Mech. Engng, MIT

(With Prof. Lallit Anand)

09/01--06/02

Teaching Assistant, Mech. Engng, MIT

(With Prof. Lallit Anand)

08/00--08/01

Research Scientist, Inst. of Mech. CAS

(with Prof. Yilong Bai)

1. Yao Liu, Wenjing Wang, Jijia Xie, Shouguang Sun, Liang Wang, Ye Qian, Yuan Meng, Yujie Wei, Microstructure and mechanical properties of aluminum 5083 weldments by gas tungsten arc and gas metal arc welding. Materials Science and Engineering A, http://dx.doi.org/10.1016/j.msea.2012.03.108, 2012.

2. Miao Tian, Wei Wang, Yujie Wei, Ronggui Yang, Stable High-Areal-Capacity Lithium-Ion Battery Anodes Based on Three-Dimensional Ni-Sn Nanowire Networks, Journal of Power Source, http://dx.doi.org/10.1016/j.jpowsour.2012.03.084, 2012.

3. Xinghua Shi, Qifang Yin, Yujie Wei, A theoretical analysis of the surface dependent binding, peeling and folding of graphene on single crystal copper, Carbon, 50, 3055-3063 (2012). http://dx.doi.org/10.1016//j.carbon.2012.02.092.

4. Yujie, Wei, An extended strain energy density failure criterion by differentiating volumetric and distortional deformation. Int. J. Solids & Structures, vol 49, 1117-1126 (2012). http://dx.doi.org/10.1016/j.ijsolstr.2012.01.015.

5. Junjie Zhang, Yujie Wei, Tao Sun, Alexander Hartmaier, Yongda Yan, Xiaodong Li, Twin boundary spacing-dependent friction in nanotwinned copper, Physical Review B, 85, 054109 (2012).

6. Y. Chen, M. Jiang, Y Wei, L. Dai. Failure criterion for metallic glasses, Philosophical Magazine, 91, 4536–4554 (2011). http://dx.doi.org/10.1080/14786435.2011.613859.

7. Yujie Wei, Anisotropic size effect in strength in coherent nanowires with tilted
twins, Physical Review B 84, 014107 (2011). http://link.aps.org/doi/10.1103/PhysRevB.84.014107

8. Fernandez A., Prado T.P., Wei, Y.J., Jerusalem A. Continuum modeling of AZ31 Magnesium alloy, a microstructural evolution study. International Journal of Plasticity, http://dx.doi.org/10.1016/j.ijplas.2011.05.002

9. Yujie Wei, Scaling of maximum strength with grain size in nanotwinned f.c.c.
metals, (2011) http://link.aps.org/doi/10.1103/PhysRevB.83.132104. Physical Review B, 83, 132104

10. Yi Liu, Chao Wang, Yujie Wei, Leyi Zhu, Dongguo Li, J. Samuel Jiang, Nenad M. Markovic, Vojislav R. Stamenkovic, and Shouheng Sun,Surfactant-Induced Postsynthetic Modulation of Pd Nanoparticle Crystallinity,http://pubs.acs.org/doi/abs/10.1021/nl104548g Nano Letters, 11, 1614-1617 (2011)

11. Yujie Wei, The kinetics and energetics of dislocation mediated de-twinning in nano-twinned face-centered cubic metals, Materials Science and Engineering A 528 (2011) 1558–1566.

12. Chao Wang, Yujie Wei, Hongyuan Jiang, Shouheng Sun. Bending Nanowire Growth in Solution by Mechanical Disturbance, Nano Letters 10, 2289-2295 (2010), DOI: 10.1021/nl100661v

13. Xiaoyan Li, Yujie Wei, Ke Lu, Lei Lu, Huajian Gao. Dislocation nucleation governed softening and maximum strength in nano-twinned metals, Nature, 464, 877-880. DOI: 10.1038/nature08929 (4/08/2010).

14. Yujie Wei, Allan F. Bower, Huajian Gao, Analytical model and molecular dynamics simulations of the size dependence of flow stress in amorphous intermetallic nanowires at temperatures near the glass transition, Phys. Rev. B, 81, 125402, 2010.

15. Chao Wang, Yujie Wei, Hongyuan Jiang, Shouheng Sun. Tug-of-War in Nanoparticles: Competitive Growth of Au on Au-Fe3O4 Nanoparticles. Nano Letters, 9, 4544-4547(2009).

16. Xiaoyan Li, Yujie Wei, Wei Yang, Huajian Gao, Competing grain-boundary- and dislocation-mediated mechanisms in plastic strain recovery in nanocrystalline aluminum, Proc. Nat. Acad. Sci. USA. 106, 16108, 2009. http://www.pnas.org/lookup/doi/10.1073/pnas.0901765106.

17. Han, Z., Wu, W.F., Li, Y., Wei, Y.J., Gao, H.J. An instability index of shear band for plasticity in metallic glasses, Acta Materialia, doi:10.1016/j.actamat.2008.11.018.

18. Yujie Wei, Huajian Gao,  Allan F. Bower. Numerical simulations of crack deflection at a twist misoriented grain boundary between two ideally brittle crystals, Journal of the Mechanics and Physics of Solids, doi.org/10.1016/j.jmps.2009.07.007 .

19. Yujie Wei. Entropic-elasticity-controlled dissociation and energetic-elasticity-controlled rupture induce catch-to-slip bonds in cell-adhesion molecules, Physical Review E, 77, 031910 (2008), Also selected to appear in the Virtual Journal of Biological Physics Research, March 15, 2008, Volume 15, Issue 6(Intermolecular Interactions) (vjbio.org).

20. Yujie Wei. Physical interpretation of the maximum receptor-ligand bond spacing to ensure cell adhesion in ligand-coated substrates, Langmuir, 24, 5644-5646 (2008).

21. Yujie Wei and Lallit Anand. On brittle-to-ductile transition and dilatancy in rocks: a micromechanical modeling, Int.  Journal of Solids and Structures, 45, 2785-2798 (2008).

22. Yujie Wei, Allan F. Bower, Huajian Gao. Enhanced strain-rate sensitivity in f.c.c. nanocrystals due to grain-boundary diffusion and sliding, Acta Materialia, 56, 1741-1752 (2008).

23. Yujie Wei, Allan F. Bower, Huajian Gao. 2007, Recoverable creep deformation and transient local stress concentration due to heterogeneous grain-boundary diffusion and sliding in polycrystalline solids, Journal of the Mechanics and Physics of Solids, 56, 1460-1483 (2008).

24. Yujie Wei and Huajian Gao, An elastic-viscoplastic model of deformation in nanocrystalline metals based on coupled mechanisms in grain boundaries and grain interiors, Mat. Sci. Engng A, 478, 16-25 (2008).

25.  Yujie Wei and Lallit Anand. Grain-boundary sliding and separation in polycrystalline metals: application to nanocrystalline f.c.c. metals, Journal of Mechanics and Physics of Solids, 52, 2587-2616 (2004).

26. Yujie Wei and Lallit Anand, A constitutive model for powder-processed nanocrystalline metals, Acta Materialia, 55, 921-931 (2007).

Links to all papers could be found by clicking the navigation bar Publication (Complete)