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Advances in Materials Research Volume 8, Number 3, September 2019 , pages 219-235 DOI: https://doi.org/10.12989/amr.2019.8.3.219 |
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Analyzing nonlinear mechanical-thermal buckling of imperfect micro-scale beam made of graded graphene reinforced composites |
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Basima Salman Khalaf, Raad M. Fenjan and Nadhim M. Faleh
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| Abstract | ||
| This research is devoted to analyzing mechanical-thermal post-buckling behavior of a micro-size beam reinforced with graphene platelets (GPLs) based on geometric imperfection effects. Graphene platelets have three types of dispersion within the structure including uniform-type, linear-type and nonlinear-type. The micro-size beam is considered to be perfect (ideal) or imperfect. Buckling mode shape of the micro-size beam has been assumed as geometric imperfection. Modified couple stress theory has been used for describing scale-dependent character of the beam having micro dimension. Via an analytical procedure, post-buckling path of the micro-size beam has been derived. It will be demonstrated that nonlinear buckling characteristics of the micro-size beam are dependent on geometric imperfection amplitude, thermal loading, graphene distribution and couple stress effects. | ||
| Key Words | ||
| nonlinear buckling; graphene platelets; geometric imperfection; thermal loading; modified couple stress theory | ||
| Address | ||
| Al-Mustansiriah University, Engineering Collage P.O. Box 46049, Bab-Muadum, Baghdad 10001, Iraq. | ||
