Topic
Flexural rigidity
About: Flexural rigidity is a research topic. Over the lifetime, 3829 publications have been published within this topic receiving 56780 citations.
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TL;DR: In this article, the vibrational and mechanical properties of polymeric glasses are examined by using coarse-grained molecular dynamics simulations, with particular attention to the effects of the bending rigidity of the polymer chains.
Abstract: The excess low-frequency vibrational spectrum, called boson peak, and non-affine elastic response are the most important particularities of glasses. Herein, the vibrational and mechanical properties of polymeric glasses are examined by using coarse-grained molecular dynamics simulations, with particular attention to the effects of the bending rigidity of the polymer chains. As the rigidity increases, the system undergoes a glass transition at a higher temperature (under a constant pressure), which decreases the density of the glass phase. The elastic moduli, which are controlled by the decrease of the density and the increase of the rigidity, show a non-monotonic dependence on the rigidity of the polymer chain that arises from the non-affine component. Moreover, a clear boson peak is observed in the vibrational density of states, which depends on the macroscopic shear modulus G. In particular, the boson peak frequency ωBP is proportional to [Formula: see text]. These results provide a positive correlation between the boson peak, shear elasticity, and the glass transition temperature.
25 citations
TL;DR: In this paper, the axial-flexural interaction of reinforced concrete columns wrapped with fiber reinforced polymer (FRP) sheets was investigated using 23 one-third scale specimens, which were tested under eccentric axial compression with load eccentricities of 35, 50 and 65 mm and in pure bending.
25 citations
TL;DR: In this paper, the shape and out-of-plane fluctuations of tensionless membranes are controlled by their bending rigidity, and the authors focus on simulation studies, which are based on the numerical analysis of dynamically triangulated surface models.
Abstract: Membranes are two-dimensional sheets of molecules which are embedded and fluctuate in three-dimensional space. The shape and out-of-plane fluctuations of tensionless membranes are controlled by their bending rigidity. Due to their out-of-plane fluctuations, flexible membranes exhibit very different behaviour to flat two-dimensional systems. We discuss three properties of membranes: (i) the renormalization of the bending rigidity in fluid membranes due to undulations on short length scales; (ii) the suppression of the crystalline phase, and the hexatic-to-fluid transition; and (iii) the lamellar-to-sponge transition in systems with variable topology. We focus on simulation studies, which are based on the numerical analysis of dynamically triangulated surface models.
25 citations
25 citations
25 citations