نتایج جستجو برای: postbuckling
تعداد نتایج: 248 فیلتر نتایج به سال:
The response of single DNA molecules to externally applied forces and torques was directly measured using an angular optical trap. Upon overwinding, DNA buckled abruptly as revealed by a sharp extension drop followed by a torque plateau. When the DNA was held at the buckling transition, its extension hopped rapidly between two distinct states. Furthermore, the initial plectonemic loop absorbed ...
The evolution of the crack growthspeed in a thin, buckled strip delamina-tion is studied and two approximate solu-tions are presented. The quasi-dynamicanalysis assumes that the deflection ofthe delaminated layer is represented bythe static postbuckling solution for thecurrent delamination length. A refinedanalysis introduces an indeterminateamplitude functio...
The objective of this study is to present a brief survey on the geometrically nonlinear free vibrations of the Bernoulli-Euler, the Rayleigh, shear, and the Timoshenko beams with simple end conditions using the Homotopy Analysis Method HAM . Expressions for the natural frequencies, the transverse deflection, postbuckling load-deflection relation to, and critical buckling load are presented. The...
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