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Welcome to the Advanced Manufacturing Laboratory

Here we focus on the scientific investigation of advanced manufacturing processes to improve quality and productivity in industry, as well as advanced robotic techniques for industrial and health care applications.  Much of our work accomplishes this via laser technologies.

Recent Publications

Laser Forming of Sandwich Panels with Metal Foam Cores, (2018)T. Bucher, S. Cardenas, R. Werma, W. Li, Y.L. Yao.

Laser forming allows bending metal foam sandwich panels up to large angles without reducing the shock-absorption capacity of the foam core or delaminating the metallic facesheets. This technology opens up many potential applications in the aerospace, automotive, and energy industries.

 

Interlaminar Toughening of GFRP—Part I: Bonding Improvement Through Diffusion and Precipitation (2017) D. Bian, B.R. Beeksma, D.J. Shim, M. Jones, Y.L. Yao.

A low concentrated polystyrene (PS) additive to epoxy is used, since it is able to reduce the curing reaction rate but not at the cost of increasing viscosity and decreasing glass transition temperature of the curing epoxy. The modified epoxy is cocured with a compatible thermoplastic interleaf during the vacuum assisted resin transfer molding (VARTM) to toughen the interlaminar of the composites. The diffusion and precipitation process between the most compatible polymer PSU and epoxy formed semi-interpenetration networks (semi-IPN). Uniaxial tensile tests were performed to quantify the effects of diffusion and precipitation regions on composite delamination resistance and toughness. Crack paths were observed to characterize crack propagation and arrest mechanism.

Laser Shock Peening for Suppression of Hydrogen-Induced Martensitic Transformation in Stress Corrosion Cracking (2017).  G. Brandal, Y.L.Yao      

Laser shock peening (LSP) improves the resistance of a material to stress corrosion cracking. The increased resistance is not just attributed to compressive residual stresses, but is also due to microstructural changes that occur during LSP. Dislocations created during LSP reduce the hydrogen concentration, thereby preventing the phase transformation from austenite to martensite.

 

 

 

Recent News

 

Prof. Yao attended MSEC/NAMRC Conference in Erie, PA June 10-13, 2019.  He presented a paper “3D Laser Forming of Metal Foam Sandwich Panels,” which is based on a collaboration with Boeing Company and funded by a GOALI grant from National Science Foundation.  He also hosted an editorial board meeting of ASME Journal of Manufacturing Science and Engineering, of which he is the editor.

Tanzim Azad and Conner Evans started their 8-week summer research with AML June 3, 2019.  They were supported by Research Experience for Undergraduates (REU) program of National Science Foundation.  Each of them is involved in an active research project going on in the AML.

Tom Zhang successfully passed his doctoral qualifying exam May 2019.  Congratulations, Tom!

Prof. Yao was invited to serve on a 5-member review committee to evaluate the Mechanical Engineering program at Indian Institute of Science (IIS) in Bangalore, India February 12-14, 2019.  The committee met with faculty and undergraduate/graduate students, toured the teaching/research facilities, and submitted an evaluation report to the Director of IIS.

Prof. Yao was invited to deliver a keynote speech at the 4th International Conference on Mechanical and Aerospace Engineering held in Bangkok, Thailand December 13-15, 2018.  He updated on the advances in laser manufacturing research.

Tizian Bucher successfully defended his doctoral dissertation on November 16, 2018.  The title is Laser Forming of Metal Foam: Mechanisms, Efficiency and Prediction. Tizian is currently with an elite engineering firm in Zurich, Switzerland.

Tizian Bucher presented a paper “Laser Forming of Sandwich Panels with Metal Foam Core” at the 37th Int. Congress on Applications of Lasers and Electro-Optics (ICALEO ’18) in Orlando, FL, October 14-18, 2018. The work is based on a collaboration with Boeing Company and funded by a GOALI grant from National Science Foundation.

Prof. Yao attended the ASME Technical Committee on Publications and Communications/Board of Editors meeting held in Pittsburg, PA on November 9-10, 2018.  He currently serves as Editor, ASME Journal of Manufacturing Science and Engineering.  He exchanged views with editors of other ASME journals.

 

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[This site was last updated on 07/01/2019]                                                                              | Department of Mechanical Engineering | SEAS | Columbia University |