Rigid Graph Compression: Motif-Based Rigidity Analysis for Disordered Fiber Networks
Abstract
Using particle-scale models to accurately describe property enhancements and phase transitions in macroscopic behavior is a major engineering challenge in composite materials science. To address some of these challenges, we use the graph theoretic property of rigidity to model mechanical reinforcement in composites with stiff rod-like particles. We develop an efficient algorithmic approach called rigid graph compression (RGC) to describe the transition from floppy to rigid in disordered fiber networks (``rod-hinge systems''), which form the reinforcing phase in many composite systems. To establish RGC on a firm theoretical foundation, we adapt rigidity matroid theory to identify primitive topological network motifs that serve as rules for composing interacting rigid particles into larger rigid components. This approach is computationally efficient and stable, because RGC requires only topological information about rod interactions (encoded by a sparse unweighted network) rather than geometrical details such as rod locations or pairwise distances (as required in rigidity matroid theory). We conduct numerical experiments on simulated two-dimensional rod-hinge systems to demonstrate that RGC closely approximates the rigidity percolation threshold for such systems, through comparison with the pebble game algorithm (which is exact in two dimensions). Importantly, whereas the pebble game is derived from Laman's condition and is only valid in two dimensions, the RGC approach naturally extends to higher dimensions.
1. , Mechanical percolation in nanocomposites: Microstructure and micromechanics , Probabilist. Eng. Mech. , 44 ( 2016 ), pp. 35 -- 42 , https://doi.org/10.1016/j.probengmech.2015.09.018.
2. , Pseudo-percolation: Critical volume fractions and mechanical percolation in polymer nanocomposites , Composite Sci. Tech. , 71 ( 2011 ), pp. 1273 -- 1279 , https://doi.org/10.1016/j.compscitech.2011.04.010.
3. J. Cederberg, A Course in Modern Geometries, 2nd ed., Springer, New York, 2001.
4. , Scalar and vectorial percolation in compressed expanded graphite , Phys. A , 294 ( 2001 ), pp. 283 -- 294 .
5. , Algorithms for three-dimensional rigidity analysis and a first-order percolation transition , Phys. Rev. E , 76 ( 2007 ), 041135 , https://doi.org/10.1103/PhysRevE.76.041135.
6. , Small but strong: A review of the mechanical properties of carbon nanotube-polymer composites , Carbon , 44 ( 2006 ), pp. 1624 -- 1652 , https://doi.org/10.1016/j.carbon.2006.02.038.
7. , Eigenvector synchronization, graph rigidity and the molecule problem , Inf. Inference , 1 ( 2012 ), pp. 21 -- 67 , https://doi.org/10.1093/imaiai/ias002.
8. , Mechanical percolation in cellulose whisker composites , Polym. Eng. Sci. , 37 ( 1997 ), pp. 1732 -- 1739 , https://doi.org/10.1002/pen.11821.
9. , Polymer nanocomposites reinforced by cellulose whiskers , Macromolecules , 28 ( 1995 ), pp. 6365 -- 6367 , https://doi.org/10.1021/ma00122a053.
10. , Three-dimensional evolution of mechanical percolation in nanocomposites with random microstructure , Probabilist. Eng. Mech. , 30 ( 2012 ), pp. 1 -- 8 , https://doi.org/10.1016/j.probengmech.2012.02.002.
11. , Almost all simply connected closed surfaces are rigid, in Geometric Topology , Lecture Notes in Math. , 438 , 1975 , pp. 225 -- 239 , https://doi.org/10.1007/BFb0066118.
12. , SIAM J. Discrete Math. , 4 ( 1991 ), pp. 355 -- 368 , https://doi.org/10.1137/0404032.
13. A. Hagberg, D. Schult, and P. Swart, Exploring network structure, dynamics, and function using NetworkX, in Proceedings of the 7th Python in Science Conference (SciPy2008), G. Varoquaux, T. Vaught, and J. Millman, eds., Pasadena, CA, 2008, pp. 11--15.
14. , The Halpin--Tsai equations: A review , Polym. Eng. Sci. , 16 ( 1976 ), pp. 344 -- 352 , https://doi.org/10.1002/pen.760160512.
15. . MacKintosh, Deformation of cross-linked semiflexible polymer networks , Phys. Rev. Lett. , 91 ( 2003 ), 108102 .
16. . MacKintosh, Distinct regimes of elastic response and deformation modes of cross-linked cytoskeletal and semiflexible polymer networks , Phys. Rev. E , 68 ( 2003 ), 061907 .
17. , Conditions for unique graph realizations , SIAM J. Comput. , 21 ( 1992 ), pp. 65 -- 84 , https://doi.org/10.1137/0221008.
18. L. Henneberg, Die Graphische Statik der Starren Systeme, B.G. Teubner, Leipzig, 1st ed., 1911.
19. , An algorithm for two-dimensional rigidity percolation: The pebble game , J. Comput. Phys. , 137 ( 1997 ), pp. 346 -- 365 , https://doi.org/10.1006/jcph.1997.5809.
20. , Generic rigidity percolation: The pebble game , Phys. Rev. Lett. , 75 ( 1995 ), pp. 4051 -- 4054 , https://doi.org/10.1103/PhysRevLett.75.4051.
21. , Generic rigidity percolation in two dimensions , Phys. Rev. E , 53 ( 1996 ), pp. 3682 -- 3693 , https://doi.org/10.1103/PhysRevE.53.3682.
22. , Cellulose-based bio- and nanocomposites: A review , Int. J. Polym. Sci. , 16 ( 1976 ), pp. 344 -- 352 , https://doi.org/10.1155/2011/837875.
23. , Structure of paper I. The statistical geometry of an ideal two dimensional fiber network , TAPPI , 43 ( 1960 ), pp. 737 -- 752 .
24. , On graphs and rigidity of plane skeletal structures , J. Engrg. Math. , 4 ( 1970 ), pp. 331 -- 340 , https://doi.org/10.1007/BF01534980.
25. , Rigidity of random networks of stiff fibers in the low-density limit , Phys. Rev. E , 64 ( 2001 ), 066117 , https://doi.org/10.1103/PhysRevE.64.066117.
26. , Rigidity transition in two-dimensional random fiber networks , Phys. Rev. E , 63 ( 2001 ), 046113 , https://doi.org/10.1103/PhysRevE.63.046113.
27. , Electrical, mechanical, and capacity percolation leads to high performance $mos_2$/nanotube composite lithium ion battery electrodes , ACS Nano , 10 ( 2016 ), pp. 5980 -- 5990 , https://doi.org/10.1021/acsnano.6b01505.
28. , On the calculation of the equilibrium and stiffness of frames , Philos. Mag. , 27 ( 1864 ), pp. 294 -- 299 .
29. , Electrical conductivity and Young's modulus of flexible nanocomposites made by metal-ion implantation of polydimethylsiloxane: The relationship between nanostructure and macroscopic properties , Acta Mater. , 59 ( 2011 ), pp. 830 -- 840 , https://doi.org/10.1016/j.actamat.2010.10.030.
30. . Bourgeat-Lami, Electrical and mechanical percolation in graphene-latex nanocomposites , Polymer , 55 ( 2014 ), pp. 5140 -- 5145 , https://doi.org/10.1016/j.polymer.2014.08.025.
31. , Elastic, viscoelastic and plastic behavior of multiphase polymer blends , J. Plast. Rubber Comp. Process. Appl. , 16 ( 1991 ), pp. 5560 -- 5572 .
32. , Uncovering the overlapping community structure of complex networks in nature and society , Nat. Lett. , 435 ( 2005 ), pp. 814 -- 818 , https://doi.org/10.1038/nature03607.
33. , Rheological and electrical percolation thresholds of carbon nanotube/polymer nanocomposites , Polym. Eng. Sci. , 52 ( 2012 ), pp. 2173 -- 2181 .
34. , Percolation and conductivity: A computer study. I , Phys. Rev. B , 10 ( 1974 ), pp. 1421 -- 1434 , https://doi.org/10.1103/PhysRevB.10.1421.
35. , Simulation of interphase percolation and gradients in polymer nanocomposites , Comp. Sci. Tech. , 69 ( 2009 ), pp. 491 -- 499 , https://doi.org/10.1016/j.compscitech.2008.11.022.
36. , Percolation-induced exponential scaling in the large current tails of random resistor networks , Multiscale Model. Simul. , 11 ( 2013 ), pp. 1298 -- 1310 , https://doi.org/10.1137/130914929.
37. , Network-based assessments of percolation-induced current distributions in sheared rod macromolecular dispersions , Multiscale Model. Simul. , 12 ( 2014 ), pp. 249 -- 264 , https://doi.org/10.1137/130926390.
38. D. Stauffer and A. Aharony, Introduction to Percolation Theory, 2nd ed., Taylor & Francis, Washington, DC, 1992.
39. , Generating isostatic frameworks , Struct. Topol. 11 ( 1985 ), pp. 21 -- 69 .
40. , Generic rigidity of network glasses, in Rigidity Theory and Applications, M. Thorpe and P. Duxbury, eds., Plenum Publishing , New York , 1999 , pp. 239 -- 277 .
41. , Elasticity of stiff polymer networks , Phys. Rev. Lett. , 91 ( 2003 ), 108103 , https://doi.org/10.1103/PhysRevLett.91.108103.
42. , Two-stage mechanical percolation in the epoxy resin intercalculated buckypaper with high mechanical performance , RSC Adv. , 3 ( 2013 ), pp. 15290 -- 15297 , https://doi.org/10.1039/C3RA42065E.
43. , A strategy for dimensional percolation in sheared nanorod dispersions , Adv. Mater. , 22 ( 2007 ), pp. 4038 -- 4043 , https://doi.org/10.1002/adma.200700011.

