arXiv: Soft Condensed Matter最新文献_第8页

Effective toughness of periodic heterogeneous materials: the role of rate-dependent fracture energies 周期性非均质材料的有效韧性:速率相关断裂能的作用

arXiv: Soft Condensed Matter Pub Date : 2020-03-30 DOI: 10.26226/morressier.5f5f8e69aa777f8ba5bd5fd2

G. Albertini, Mathias Lebihain, F. Hild, L. Ponson, David S. Kammer

引用次数: 0

The Role of annealed defects on conformational statistics of a selfavoiding semi-flexible polymer chain: Exact Results (I) 退火缺陷对自向半柔性聚合物链构象统计的作用:精确结果(I)

arXiv: Soft Condensed Matter Pub Date : 2020-03-29 DOI: 10.24327/IJCAR.2020.21291.4179

Pramod Kumar Mishra

引用次数: 0

Singular Nature of the Elastocapillary Ridge 弹性毛细管脊的奇异性

arXiv: Soft Condensed Matter Pub Date : 2020-03-22 DOI: 10.1103/PHYSREVX.10.031067

A. Pandey, A. Pandey, B. Andreotti, S. Karpitschka, G. Zwieten, E. V. Brummelen, J. Snoeijer

{"title":"Singular Nature of the Elastocapillary Ridge","authors":"A. Pandey, A. Pandey, B. Andreotti, S. Karpitschka, G. Zwieten, E. V. Brummelen, J. Snoeijer","doi":"10.1103/PHYSREVX.10.031067","DOIUrl":"https://doi.org/10.1103/PHYSREVX.10.031067","url":null,"abstract":"The functionality of soft interfaces is crucial to many applications in biology and surface science. Recent studies have used liquid drops to probe the surface mechanics of elastomeric networks. Experiments suggest an intricate surface elasticity, also known as the Shuttleworth effect, where surface tension is not constant but depends on substrate deformation. However, interpretations have remained controversial due to singular elastic deformations, induced exactly at the point where the droplet pulls the network. Here we reveal the nature of the elastocapillary singularity on a hyperelastic substrate with various constitutive relations for the interfacial energy. First, we finely resolve the vicinity of the singularity using goal-adaptive finite element simulations. This confirms the universal validity, also at large elastic deformations, of the previously disputed Neumann's law for the contact angles. Subsequently, we derive exact solutions of nonlinear elasticity that describe the singularity analytically. These solutions are in perfect agreement with numerics, and show that the stretch at the contact line, as previously measured experimentally, consistently points to a strong Shuttleworth effect. Finally, using Noether's theorem we provide a quantitative link between wetting hysteresis and Eshelby-like forces, and thereby offer a complete framework for soft wetting in the presence of the Shuttleworth effect.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83065994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Stability of topological wall defects on spheres with n-atic order n-有序球面上拓扑壁缺陷的稳定性

arXiv: Soft Condensed Matter Pub Date : 2020-03-20 DOI: 10.1103/PHYSREVRESEARCH.2.023215

C. Saichand, Jaya Kumar Alageshan, A. Roy, Y. Hatwalne

引用次数: 0

Symmetry breaking of dipole orientations on Caspar-Klug lattices Caspar-Klug晶格上偶极子取向的对称性破缺

arXiv: Soft Condensed Matter Pub Date : 2020-03-19 DOI: 10.1103/physrevresearch.2.043199

S. Čopar, A. Božič

{"title":"Symmetry breaking of dipole orientations on Caspar-Klug lattices","authors":"S. Čopar, A. Božič","doi":"10.1103/physrevresearch.2.043199","DOIUrl":"https://doi.org/10.1103/physrevresearch.2.043199","url":null,"abstract":"Anisotropic dipole-dipole interaction often plays a key role in biological, soft, and complex matter. For it to induce non-trivial order in the system, there must be additional repulsive interactions or external potentials involved that partially or completely fix the positions of the dipoles. These positions can often be represented as an underlying lattice on which dipole interaction induces orientational ordering of the particles. On lattices in the Euclidean plane, dipoles have been found to assume different ground state configurations depending on the lattice type, with a global ordering in the form of a macrovortex being observed in many cases. A similar macrovortex configuration of dipoles has recently been shown to be the sole ground state for dipoles positioned on spherical lattices based on solutions of the Thomson problem. At the same time, no symmetric configurations have been observed, even though the positional order of Thomson lattices exhibits a high degree of symmetry. Here, we show that a different choice of spherical lattices based on Caspar-Klug construction leads to ground states of dipoles with various degrees of symmetry, including the icosahedral symmetry of the underlying lattice. We analyze the stability of the highly symmetric metastable states, their symmetry breaking into subsymmetries of the icosahedral symmetry group, and present a phase diagram of symmetries with respect to lattice parameters. The observed relationship between positional order and dipole-induced symmetry breaking hints at ways of fine-tuning the structure of spherical assemblies and their design.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79493188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Dynamics of a viscoelastic liquid filament connected to two mobile droplets 连接两个可移动液滴的粘弹性液体细丝的动力学

arXiv: Soft Condensed Matter Pub Date : 2020-03-17 DOI: 10.1063/5.0004151

Jiajia Zhou, M. Doi

引用次数: 5

Electro-osmotic properties of porous permeable films 多孔渗透膜的电渗透特性

arXiv: Soft Condensed Matter Pub Date : 2020-03-14 DOI: 10.1103/physrevfluids.5.123701

Elena F. Silkina, Naren Bag, O. Vinogradova

引用次数: 6

Forces between silica particles in isopropanol solutions of 1:1 electrolytes 在1:1电解质的异丙醇溶液中二氧化硅颗粒之间的力

arXiv: Soft Condensed Matter Pub Date : 2020-03-09 DOI: 10.1103/PHYSREVRESEARCH.2.023315

B. Stojimirović, M. Galli, G. Trefalt

引用次数: 1

Bending-induced director reorientation of a nematic liquid crystal elastomer bonded to a hyperelastic substrate 结合超弹性基底的向列液晶弹性体的弯曲诱导定向重定向

arXiv: Soft Condensed Matter Pub Date : 2020-03-09 DOI: 10.1063/5.0038822

Yang Liu, Wendi Ma, H. Dai

{"title":"Bending-induced director reorientation of a nematic liquid crystal elastomer bonded to a hyperelastic substrate","authors":"Yang Liu, Wendi Ma, H. Dai","doi":"10.1063/5.0038822","DOIUrl":"https://doi.org/10.1063/5.0038822","url":null,"abstract":"In this paper, the two-dimensional pure bending of a hyperelastic substrate coated by a nematic liquid crystal elastomer (abbreviated as NLCE) is studied within the framework of nonlinear elasticity. The governing system, arising from the deformational momentum balance, the orientational momentum balance and the mechanical constraint, is formulated, and the corresponding exact solution is derived for a given constitutive model. It is found that there exist two different bending solutions. In order to determine which the preferred one is, we compare the total potential energy for both solutions and find that the two energy curves may have an intersection point at a critical value of the bending angle $alpha_c$ for some material parameters. In particular, the director $bm n$ abruptly rotates $dfrac{pi}{2}$ from one solution to another at $alpha_c$, which indicates a director reorientation (or jump). Furthermore, the effects of different material and geometric parameters on the bending deformation and the transition angle $alpha_c$ can be revealed using the obtained bending solutions. Meanwhile, the exact solution can offer a benchmark problem for validating the accuracy of approximated plate models for liquid crystal elastomers.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90545030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Towards a soft magnetoelastic twist actuator 一种软磁弹性扭致动器

arXiv: Soft Condensed Matter Pub Date : 2020-03-09 DOI: 10.1103/PHYSREVRESEARCH.2.023383

Lukas P. Fischer, A. Menzel

{"title":"Towards a soft magnetoelastic twist actuator","authors":"Lukas P. Fischer, A. Menzel","doi":"10.1103/PHYSREVRESEARCH.2.023383","DOIUrl":"https://doi.org/10.1103/PHYSREVRESEARCH.2.023383","url":null,"abstract":"Soft actuators allow to transform external stimuli to mechanical deformations. Because of their deformational response to external magnetic fields, magnetic gels and elastomers represent ideal candidates for such tasks. Mostly, linear magnetostrictive deformations, that is, elongations or contractions along straight axes are discussed in this context. In contrast to that, we here suggest to realize a twist actuator that responds by torsional deformations around the axis of the applied magnetic field. For this purpose, we theoretically investigate the overall mechanical response of a basic model system containing discrete magnetizable particles in a soft elastic matrix. Two different types of discrete particle arrangements are used as starting conditions in the nonmagnetized state. These contain globally twisted anisotropic particle arrangements on the one hand, and groups of discrete helical-like particle structures positioned side by side on the other hand. Besides the resulting twist upon magnetization, we also evaluate different other modes of deformation. Our analysis supports the construction of magnetically orientable and actuatable torsional mixing devices in fluidic applications or other types of soft actuators that initiate relative rotations between different components.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74045780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7