Postbuckling investigation on the micromachined double-clamped beams

Xing Chen, Liansheng Ma, Yingmei Zheng, Bo Wang, Dong Weon Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


In this paper, thermal postbuckling of a beam-like structure subjected to a uniform thermal loading is studied both theoretically and experimentally. In theory aspect, the equations governing the axial and transverse deformations of beams are derived. The two equations are reduced to a single nonlinear fourth-order integral-differential equation governing the transverse deformations. The analytical method presented here offers a simple yet efficient solution approach to analyze the bistable behavior of microbeam or beam-like structures under thermal loading. Then, microfabricated double-clamped beams are chosen as experimental object due to its precise dimensions and easy loading method. The lab-made HF vapor system was used to release the suspended structures with satisfactory results. After the fabrication and measurement, by comparing the theoretical results with experimental results, an excellent agreement is gotten. It proves not only the validity of the solution obtained here, on the other hand, importantly, it also demonstrates a new field for MEMS as another easy and accurate tool to investigate mechanics problems. With the accurate solutions for posbuckling beams, we apply it into new electrothermal postbuckling actuators, a big deflection promising the possibility of a new kind of actuator.

Original languageEnglish (US)
Title of host publicationMEMS, NANO and Smart Systems
Number of pages7
StatePublished - 2012
Event2011 7th International Conference on MEMS, NANO and Smart Systems, ICMENS 2011 - Kuala Lumpur, Malaysia
Duration: Nov 4 2011Nov 6 2011

Publication series

NameAdvanced Materials Research
ISSN (Print)1022-6680


Other2011 7th International Conference on MEMS, NANO and Smart Systems, ICMENS 2011
CityKuala Lumpur


  • Microbeams
  • Postbuckling beams
  • Thermal actuators

ASJC Scopus subject areas

  • Engineering(all)


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