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(a) Finite element mesh of a beam AH model, where before and after tensile loading are superimposed. (b) Top view of the beam model, where the blue circle is the original coil circle and the colored circle is the deformed one. (c) FE mesh of a shell AH model (representing DNA ribbon) superimposing initial and deformed configurations. (d) Top view of the shell model, where the outside black circle is the original shape. To see this figure in color, go online.
