scholarly journals Gluten Adhesion and Shearing in a Contact-Based Coarse-Grained Model

2021 ◽  
Vol 69 (2) ◽  
Author(s):  
Łukasz Mioduszewski ◽  
Marek Cieplak
Keyword(s):  
Molecular Dynamics ◽  
Shear Modulus ◽  
Critical Strain ◽  
Coarse Grained ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Interconnected Network ◽  
Gluten Proteins ◽  
Coarse Grained Model ◽  
Bond Theory

AbstractWe study adhesion of the gluten proteins during the shear and normal deformations as described by a coarse-grained molecular dynamics. We show that the two types of deformation have a different impact on the proteins. We also calculate the dynamic shear modulus and critical strain and find the results to be consistent with the slip-bond theory which assumes that the gluten proteins can be treated as an interconnected network of polymers. Graphical Abstract

scholarly journals New Structure for Strengthening Soil Embankments

2018 ◽  
Vol 2018 ◽  
pp. 1-16
Author(s):  
Fang Xu ◽  
Wuming Leng ◽  
Rusong Nie ◽  
Qishu Zhang ◽  
Qi Yang
Keyword(s):  
Shear Modulus ◽  
Large Scale ◽  
Dynamic Stress ◽  
Confining Pressure ◽  
Coarse Grained ◽  
Triaxial Tests ◽  
Additional Stress ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Critical Dynamic

A new prestressed reinforcement device (PRD) consisting of two lateral pressure plates (LPPs) and a reinforcement bar is developed to strengthen soil embankments by improving the soil confining pressure and providing lateral constraint on embankment slopes. The reinforcement effects of PRDs were demonstrated by investigating the beneficial effects of increasing confining pressure on the soil behavior via the performance of a series of large-scale static and cyclic triaxial tests on a coarse-grained embankment soil. The results show that PRDs can effectively improve the soil shear strength, bearing capacity, ability to resist elastic and plastic deformation, critical dynamic stress, and dynamic shear modulus, and empirical methods were also developed to determine the critical dynamic stress and initial dynamic shear modulus of the embankment soil. Moreover, 3D finite element analyses (FEAs) with an LPP width of 1.2 m were performed to analyze the additional stress field in a prestressed heavy-haul railway embankment. The FEAs showed that the additional stress at a given external distance from the border of an LPP first increased to a maximum value and then gradually decreased with increasing depth; the additional stress was transferred to the zones where the subgrade tends to have higher stresses with peak stress diffusion angles of 34° (slope direction) and 27° (longitudinal direction); and a continuous effective reinforcement zone with a minimum additional stress coefficient of approximately 0.2 was likely to form at the diffusion surface of the train loads, provided that the net spacing of the LPPs was 0.7 m. The reinforcement zone above the diffusion surface of the train loads can act as a protective layer for the zones that tend to have higher stresses. Finally, the advantages and application prospects of PRDs are discussed in detail. The newly developed PRDs may provide a cost-effective alternative for strengthening soil embankments.

Model for Dynamic Shear Modulus of Semiflexible Polymer Solutions

1997 ◽  
Vol 489 ◽  
Author(s):  
F. Gittes ◽  
B. Schnurr ◽  
C. F. Schmidt ◽  
P. D. Olmsted ◽  
F. C. Mackintosh
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Shear Modulus ◽  
Mesh Size ◽  
Dynamics Simulation ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Static Modulus ◽  
Semiflexible Polymer ◽  
Hydrodynamic Effects

AbstractWe discuss a dynamical model for the frequency-dependent shear modulus of an entangled solution of semifexible polymers, based on longitudinal fluctuations in filaments between entanglement points or crosslinks. The goal is to explain non-Rouse, power-law scaling of the bulk shear modulus that is found via microscopic rheology of highly entangled F-actin solutions. This generalizes a previous model for the static modulus. Hydrodynamic effects, and the validity of a local drag approximation below the scale of the mesh size, are discussed. We test aspects of our model via a molecular dynamics simulation, and also present for comparison experimental results from microrheology on F-actin.

scholarly journals Molecular Dynamics Study of Ganglioside GM3/DPPC Membrane by Using Coarse-Grained Model

2016 ◽  
Vol 110 (3) ◽  
pp. 323a
Author(s):  
Kento Inoue ◽  
Eiji Ymamoto ◽  
Daisuke Takaiwa ◽  
Kenji Yasuoka ◽  
Masuhiro Mikami
Keyword(s):  
Molecular Dynamics ◽  
Coarse Grained ◽  
Ganglioside Gm3 ◽  
Coarse Grained Model

Shear Modulus and Damping Ratio of Gravel Material

2011 ◽  
Vol 105-107 ◽  
pp. 1426-1432 ◽  
Author(s):  
De Gao Zou ◽  
Tao Gong ◽  
Jing Mao Liu ◽  
Xian Jing Kong
Keyword(s):  
Shear Modulus ◽  
Shear Strain ◽  
Strain Amplitude ◽  
Damping Ratio ◽  
Confining Pressure ◽  
Dynamic Shear Modulus ◽  
Test Results ◽  
Dynamic Shear ◽  
Data Points ◽  
Shear Strain Amplitude

Two of the most important parameters in dynamic analysis involving soils are the dynamic shear modulus and the damping ratio. In this study, a series of tests were performed on gravels. For comparison, some other tests carried out by other researchers were also collected. The test results show that normalized shear modulus and damping ratio vary with the shear strain amplitude, (1) normalized shear modulus decreases with the increase of dynamic shear strain amplitude, and as the confining pressure increases, the test data points move from the low end toward the high end; (2) damping ratio increases with the increase of shear strain amplitude, damping ratio is dependent on confining pressure where an increase in confining pressure decreased damping ratio. According to the test results, a reference formula is proposed to evaluate the maximum dynamic shear modulus, the best-fit curve and standard deviation bounds for the range of data points are also proposed.

scholarly journals The effect of fluid saturation on the dynamic shear modulus of tight sandstones

2017 ◽  
Vol 14 (5) ◽  
pp. 1072-1086 ◽  
Author(s):  
Dongqing Li ◽  
Jianxin Wei ◽  
Bangrang Di ◽  
Pinbo Ding ◽  
Da Shuai
Keyword(s):  
Shear Modulus ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Fluid Saturation

Experimental Study on Dynamic Characteristics of Ionic Soil Stabilizer Reinforcing Red Clay

2011 ◽  
Vol 374-377 ◽  
pp. 1391-1395
Author(s):  
Xue Song Lu ◽  
Wei Xiang
Keyword(s):  
Shear Modulus ◽  
Shear Strain ◽  
Dynamic Condition ◽  
Damping Ratio ◽  
Confining Pressure ◽  
Natural Soil ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Red Clay ◽  
Soil Stabilizer

Based on the red clay of Wuhan reinforced by Ionic Soil Stabilizer, the red clay soil is treated by different matches of ISS at first, then is tested in the Atterberg limits test and dynamic triaxia test. The results show that the plastic index decreases, and the red clay were greatly improved under the dynamic condition, the maximum dynamic shear modulus ratio acquired an incensement of 27.72% on average after mixing the ISS into the red clay. In addition, It was concluded that the confining pressure influenced the dynamic shear modulus and damping ratio to a certain extent. Given the same strain conditions, with the incensement of confining pressure increases, the dynamic shear modulus increased and the damping ratio decreased. Moreover, when plotting the dynamic shear modulus versus the dynamic shear strain, the similar curve can be formed for both the natural soil and the modified one, the dynamic shear modulus monotonously decreased with the incensement of the dynamic shear strain. However, the value of dynamic shear modulus differed in the same shear strain between the natural soil and the soil modified by ISS.

scholarly journals LONG-TIME INVESTIGATION OF CEMENT COMPOSITE MATERIAL WITH MICRONIZED WASTE MARBLE POWDER: DYNAMIC MODULES

2017 ◽  
Vol 13 ◽  
pp. 93
Author(s):  
Zdeněk Prošek ◽  
Jaroslav Topič
Keyword(s):  
Shear Modulus ◽  
Modulus Of Elasticity ◽  
Dynamic Modulus ◽  
Blended Cement ◽  
Resonance Method ◽  
Partial Replacement ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Dynamic Modulus Of Elasticity ◽  
Marble Powder

This article focus on “blended cement”. The blended cement was created by using waste marble powder (WMP) as a partial replacement for cement. We investigated the influence of WMP on the developing of the dynamic modulus of elasticity and the dynamic shear modulus in time. Four different cement composites with WMP as a partial replacement for cement were studied (5, 10, 15 and 50 wt. %) together with reference samples. Dynamic modulus of elasticity was monitored during the first 377 days since manufacture by use of non-destructive testing (resonance method). The results showed that WMP in a small amount had a no effect on the dynamic modulus of elasticity and the dynamic shear modulus.

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