Wavelet method applied to specific adhesion of elastic solids via molecular bonds  

作　　者：Lei Zhang Jizeng Wang Youhe Zhou 

机构地区：[1]Key Laboratory of Mechanics on Disaster and Environment in Western China,Ministry of Education, College of Civil Engineering and Mechanics, Lanzhou University

出　　处：《Theoretical & Applied Mechanics Letters》2014年第4期47-53,共7页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11032006 and 11121202);National Key Project of Magneto-Constrained Fusion Energy Development Program(2013GB110002);the Fundamental Research Funds for the Central Universities(lzujbky-2013-1)

摘　　要：We propose a wavelet method to analyze the stochastic-elastic problem of specific adhesion between two elastic solids via ligand-receptor bond clusters, which is governed by a nonlinear integro-differential equation with a sin- gular Cauchy kernel to describe the mean-field coupling between deformation of elastic materials and stochastic behavior of the molecular bonds. To solve this problem, Galerkin method based on a wavelet approximation scheme is adopted, and special treatment which transforms the singular Cauchy kernel into a smooth one has been proposed to avoid the cumbersome calculation of singular integrals. Numerical results demonstrate that the method is fully capable of solving the specific adhesion problems with complex nonlinear and singular equations. Based on the proposed method, investigations are performed to reveal the relation between steady-state pulling force and mean surface separation under different stress concentration indexes, which is crucial for assembling the overall constitutive relations for multicellular tumor spheroids and polymer-matrix microcomposites.We propose a wavelet method to analyze the stochastic-elastic problem of specific adhesion between two elastic solids via ligand-receptor bond clusters, which is governed by a nonlinear integro-differential equation with a sin- gular Cauchy kernel to describe the mean-field coupling between deformation of elastic materials and stochastic behavior of the molecular bonds. To solve this problem, Galerkin method based on a wavelet approximation scheme is adopted, and special treatment which transforms the singular Cauchy kernel into a smooth one has been proposed to avoid the cumbersome calculation of singular integrals. Numerical results demonstrate that the method is fully capable of solving the specific adhesion problems with complex nonlinear and singular equations. Based on the proposed method, investigations are performed to reveal the relation between steady-state pulling force and mean surface separation under different stress concentration indexes, which is crucial for assembling the overall constitutive relations for multicellular tumor spheroids and polymer-matrix microcomposites.

关 键 词：WAVELET cell adhesion NONLINEARITY SINGULARITY force-separation relation 

分 类 号：O341[理学—固体力学] O174.2[理学—力学]