We have investigated the conductance of carbon nanotubes under mechanical distortions likely to occur when forming nanoscale electronic devices. Using a realistic tight-binding Hamiltonian, several structuredependent classes of electrical behavior in deformed nanotubes have been discovered. Bending, defects, and tube-tube contacts are shown to strongly modify transport in individual nanotubes, ...

A precure–hot forming–postcure (P–HF–P) process, in which CFRP prepregs were firstly hot pressed to eliminate its interlayer voids and pre-cured followed by formed into 3D shapes finally post-cured, was proposed for the rapid fabrication of parts. The void fraction, flexural modulus strength different regions parts fabricated P–HF–P autoclave processes evaluated. Then overall axial compression ...

Abstract In recent years, with navigation, aviation, chemical manufacturing, and automobile bodies increasing requirements for lightweight, high efficiency, energy saving, quality in the selection of materials manufacturing process are also improved. However, there is an unavoidable elastic deformation plastic bending panel veneer, accuracy workpiece impacted by spring back phenomenon, which ca...

Context. H2O is the most abundant component of astrophysical ices. In most lines of sight it is not possible to fit both the H2O 3 μm stretching, the 6 μm bending intensities with a single pure H2O spectrum. Recent Spitzer observations have revealed CO2 ice in high abundances and it has been suggested that CO2 mixed into H2O ice can affect the positions, shapes and relative strengths of the 3 μ...

An approximate numerical mthod is presented for analysis and determination of modal characteristics in straight, pretwisted non-unifom helicopter blades. The analysis considers the coupled flapwise bending (out of plane), chordwise bending (in plane), and torsion vibration of both rotating and non-rotating blades. The proposed method is based on the integral expansion of Green functions (struct...