Quantitative prediction of elastomer degradation and mechanical behavior based on diffusion–reaction process

2020 ◽  
Vol 137 (47) ◽  
pp. 49542 ◽  
Author(s):  
Min Lu ◽  
Haowei Zhang ◽  
Li Sun
Keyword(s):  
Mechanical Behavior ◽  
Reaction Process ◽  
Diffusion Reaction ◽  
Quantitative Prediction ◽  
Behavior Based

Morphological Instability of a Sic Film During Carbonization

1996 ◽  
Vol 436 ◽  
Author(s):  
C.-H. Chiu ◽  
L. B. Freund
Keyword(s):  
Surface Energy ◽  
Strain Energy ◽  
Film Surface ◽  
Interface Energy ◽  
Reaction Process ◽  
Diffusion Reaction ◽  
Carbon Precursor ◽  
Morphological Stability ◽  
Si Substrate ◽  
Sic Film

AbstractA model is developed to understand the morphological stability of a SiC film on a Si substrate during carbonization where the Si substrate is exposed to a carbon precursor. The morphological stability is determined by considering the surface evolution along a slightly wavy film surface and film-substrate interface. The morphological evolution along the film surface is dominated by surface diffusion and along the interface by a chemical reaction. The kinetic analysis shows the stability is controlled by the film surface energy, the interface energy, the diffusion-reaction process of the carbon precursor, and the strain energy. At small wavelengths of the surface profiles, the two types of surface energy dominate, which results in stable morphology. The diffusion-reaction process dictates the surface stability at large wavelengths. The strain energy may cause the surfaces to become unstable at moderate wavelengths; the instability can be completely suppressed by the diffusion-reaction process and the film surface energy, while it is enhanced by a large value of interface energy.

MODELING AN ENZYMATIC DIFFUSION-REACTION PROCESS IN ONE DIMENSIONAL SPACE

2006 ◽  
Vol 39 (18) ◽  
pp. 435-440
Author(s):  
J. Santos ◽  
E. Castellanos ◽  
R. Lozano ◽  
A. Friboulet ◽  
S. Mondié
Keyword(s):  
Dimensional Space ◽  
Reaction Process ◽  
Diffusion Reaction ◽  
One Dimensional

Probability distribution of the life time of a drift-diffusion-reaction process inside a sphere with applications to transient cathodoluminescence imaging

2018 ◽  
Vol 24 (2) ◽  
pp. 79-92 ◽  
Author(s):  
Karl K. Sabelfeld ◽  
Anastasiya Kireeva
Keyword(s):  
Broad Class ◽  
Life Time ◽  
Stochastic Simulation Algorithm ◽  
Reaction Process ◽  
Diffusion Reaction ◽  
Threading Dislocations ◽  
Time Behavior ◽  
Drift Diffusion ◽  
Robin Boundary ◽  
Cathodoluminescence Imaging

Abstract Exact representations for the probability density of the life time and survival probability for a sphere and a disc are derived for a general drift-diffusion-reaction process. Based on these new formulas, we suggest an extremely efficient stochastic simulation algorithm for solving transient cathodoluminescence (CL) problems without any mesh in space and time. The method can be applied to a broad class of drift-diffusion-reaction problems where the time behavior of the absorbed material is of interest. The important advantage of the method suggested is the ability to incorporate local inclusions like dislocations, point defects and other singular folds and complicated structures. General Robin boundary conditions on the boundary are treated in a probabilistic way. The method is tested against exact solutions for a series of examples with bounded and unbounded domains. An application to the dislocation imaging problem, which includes thousand threading dislocations, is given.

Analysis of Bending Strength of the Rectangular Hole Honeycomb Beam

2013 ◽  
Vol 405-408 ◽  
pp. 993-996
Author(s):  
Su Juan Dai ◽  
Bao Chen Zhu ◽  
Qing Chen
Keyword(s):  
Mechanical Behavior ◽  
Normal Stress ◽  
Calculation Method ◽  
Bending Strength ◽  
Calculation Formula ◽  
Rectangular Hole ◽  
Stress Calculation ◽  
Behavior Based

This paper introduces the characteristics and practicability of the honeycomb beam and analyses the mechanical behavior. Based on the vierendeel truss theory, the normal stress calculation method of the rectangular hole honeycomb beam is discussed, and the calculation formula is deduced. Finally using the derived formula, the paper calculates the normal stress of the rectangular hole honeycomb beams with different parameters, and analyses the influence of the opening rate and the hole spacing on the strength of honeycomb beam by comparing the same section of solid web beam, thus, provides reference for design of steel honeycomb beam.

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