Li Yang

Asst Professor

Assoc Professor

Dr. Yang received his Ph.D. in industrial engineering from North Carolina State University in 2011, and M.S. in mechanical engineering from Tsinghua University in 2007. Between 2012 and 2013, he worked as testing engineer in B/E Aerospace, and took primary responsibilities of the establishment and daily operation of the life cycle testing group. He is the recipient of the 2016 International Outstanding Young Researcher in Freeform and Additive Manufacturing Award. 2012 Emerald Engineering Outstanding Doctoral Research Award in Additive Manufacturing, and 2007 3rd Grade Scholarship of Excellency in Tsinghua University. Dr. Yang is a member of IIE, SME, SAMPE, ACerS, AIST and ASM. He is also a member of Alpha Pi Mu.

Education

  • Ph.D. in Industrial Enginnering, North Carolina State University, 2011
  • M.S. in Mechanical Engineering, Tsinghua University, 2007
  • B.S. in Mechanical Engineering, Tsinghua University, 2004

Publications

Drop-weight impact characteristics of additively manufactured sandwich structures with different cellular designs- 2018

\textcopyright 2018 Elsevier Ltd In the design of sandwich panels with cellular cores for energy absorption, the geometrical effect of the cellular core design has not been investigated in details previously. In this work three cellular core designs, including re-entrant auxetic, octet-truss, and BCC lattice, were experimentally investigated for their performance under low-energy impact as sandwich structures. Samples with different cellular core designs were fabricated by laser sintering additive manufacturing process using Nylon 12 as material, and evaluated by drop weight testing under multiple strikes and at two levels of elevated temperatures (93 °C and 121 °C). It was found that beside relative densities, the geometrical design of the cellular cores could also significantly influence the impact energy absorption performance of the sandwich structures. It was also found that the impact energy absorption of the cellular structures investigated in this study does not have a significant correlation with either the quasi-static mechanical properties or the temperature. In addition, the auxetic cellular structure exhibits optimal overall energy absorption performance compared to both the octet-truss and the BCC lattice.

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