Dr James Adams

Lecturer

Qualifications: PhD (Cantab)

Email:
Phone: Work: 01483 68 2723
Room no: 14 BB 03

Further information

Biography

  • 1998-2002 MA, MSci, Natural Sciences Cambridge University
  • 2002-2005 PhD, Theory of Condensed matter group, Cambridge University main chain and smectic liquid crystalline elastomers supervised by Prof. Mark Warner
  • 2005-2007 Research Fellowship Royal Commission for the Exhibition of 1851, worked with Prof. Peter Olmsted and Dr Suzanne Fielding on models of shear banding in wormlike micelles, and Prof. Sergio Conti and Prof. Antonio DeSimone on microstructure in smectic elastomers
  • 2005-2008 Junior Research fellowship at Fitzwilliam College, Cambridge
  • 2008-2009 Postdoctoral researcher Cavendish Laboratory, Cambridge
  • 2009-present Lecturer University of Surrey
  • 2011 Awarded the Instutite of Physics Liquids and Complex Fluids Early Career Researcher Prize

Research Interests

My research interests are focused on the properties of polymer systems, including:

  • Elasticity of smectic liquid crystalline elastomers
  • Ferroelectric smectic liquid crystalline elastomers
  • Quasiconvexification and microstructure in elastomers
  • Hairpin defects and main chain elastomers
  • Chiral random walks and polarization in main chain elastomers
  • Shear banding in complex fluids
  • Non-equilibrium thermodynamics
  • Topological defects in liquid crystals
  • Switchable adhesion

Publications

Highlights

  • Adams JM, Fielding SM, Olmsted PD. (2011) 'Transient shear banding in entangled polymers: A study using the Rolie-Poly model'. JOURNAL OF RHEOLOGY, 55 (5), pp. 1007-1032.
  • Adams JM, Olmsted PD. (2009) 'Nonmonotonic Models are Not Necessary to Obtain Shear Banding Phenomena in Entangled Polymer Solutions'. PHYSICAL REVIEW LETTERS, 102 (6) Article number ARTN 067801
  • Adams JM, Fielding SM, Olmsted PD. (2008) 'The interplay between boundary conditions and flow geometries in shear banding: Hysteresis, band configurations, and surface transitions'. JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, Naples, ITALY: 151 (1-3), pp. 101-118.
  • Adams JM, Warner M. (2008) 'Mechanical response of smectic-C elastomers'. PHYSICAL REVIEW E, 77 (2) Article number ARTN 021702

Journal articles

  • Brown AW, Adams JM. (2013) 'Numerical study of stretched smectic-A elastomer sheets'. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 88 (1)

    Abstract

    We present a numerical study of stretching monodomain smectic-A elastomer sheets, computed using the finite element method. When stretched parallel to their smectic layer normal the smectic layers are unstable to a transition to a buckled state. We model macroscopic deformations by replacing the microscopic energy with a coarse grained effective free energy that accounts for the fine-scale layer buckling. We augment this model with a term to describe the energy of deforming buckled layers, which is necessary to reproduce the experimentally observed Poisson ratios postbuckling. We examine the spatial distribution of the microstructure phases for various stretching angles relative to the layer normal and for different length-to-width aspect ratios. When stretching parallel to the layer normal the majority of the sample forms a bidirectionally buckled microstructure, except at the clamps where a unidirectionally buckled microstructure is predicted. When stretching at small inclinations to the layer normal the phase of the sample is sensitive to the aspect ratio of the sample, with the bidirectionally buckled phase persistent to large angles only for small aspect ratios. We relate these theoretical results to experiments on smectic-A elastomers. © 2013 American Physical Society.

  • Corbett DR, Adams JM. (2013) 'Tack energy and switchable adhesion of liquid crystal elastomers'. Soft Matter, 9 Article number 1151 , pp. 1151-1163.

    Abstract

    The mechanical properties of liquid crystal elastomers (LCEs) make them suitable candidates for pressure sensitive adhesives (PSAs). Using the nematic dumbbell constitutive model, and the block model of PSAs, we study their tack energy and the debonding process as could be measured experimentally in the probe-tack test. To investigate their performance as switchable PSAs we compare the tack energy for the director aligned parallel, and perpendicular to the substrate normal, with that for the isotropic state. We find that the tack energy is larger in the parallel alignment than the isotropic case by over a factor of two. The tack energy for the perpendicular alignment can be 50% less than the isotropic case. We propose a mechanism for reversibly switchable adhesion based on the reversibility of the isotropic to nematic transition. Finally we consider the influence of several material parameters that could be used to tune the stress–strain response.

  • Brown AW, Adams JM. (2012) 'Negative Poisson’s ratio and semisoft elasticity of smectic-$C$ liquid-crystal elastomers'. Phys. Rev. E, 85 Article number 011703
  • Adams JM, Fielding SM, Olmsted PD. (2011) 'Transient shear banding in entangled polymers: A study using the Rolie-Poly model'. JOURNAL OF RHEOLOGY, 55 (5), pp. 1007-1032.
  • Spillmann CM, Konnert JH, Adams JM, Deschamps JR, Naciri J, Ratna BR. (2010) 'Strain analysis of a chiral smectic-A elastomer'. PHYSICAL REVIEW E, 82 (3) Article number ARTN 031705
  • Adams JM, Olmsted PD. (2009) 'Comment on "Nonmonotonic Models are Not Necessary to Obtain Shear Banding Phenomena in Entangled Polymer Solutions" Reply'. PHYSICAL REVIEW LETTERS, 103 (21) Article number ARTN 219802
  • Adams JM, Olmsted PD. (2009) 'Nonmonotonic Models are Not Necessary to Obtain Shear Banding Phenomena in Entangled Polymer Solutions'. PHYSICAL REVIEW LETTERS, 102 (6) Article number ARTN 067801
  • Adams JM, Warner M. (2009) 'Mechanical switching of ferroelectric rubber'. PHYSICAL REVIEW E, 79 (6) Article number ARTN 061704
  • Adams JM, Olmsted PD. (2009) 'Adams and olmsted reply:'. Physical Review Letters, 103 (21)

    Abstract

    A Reply to the Comment by Shi-Qing Wang. © 2009 The American Physical Society.

  • Adams JM, Fielding SM, Olmsted PD. (2008) 'The interplay between boundary conditions and flow geometries in shear banding: Hysteresis, band configurations, and surface transitions'. JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, Naples, ITALY: 151 (1-3), pp. 101-118.
  • Adams J, Conti S, DeSimone A, Dolzmann G. (2008) 'Relaxation of a transversally isotropic energy and application to smectic A elastomers'. Mathematical Models and Methods in Applied Sciences (M3AS), 18 (1), pp. 1-20.
  • Stenull O, Lubensky TC, Adams JM, Warner M. (2008) 'Smectic-$C$ tilt under shear in smectic-$A$ elastomers'. PHYS REV E, 78, pp. 021705-021705.
  • Adams JM, Warner M. (2008) 'Mechanical response of smectic-C elastomers'. PHYSICAL REVIEW E, 77 (2) Article number ARTN 021702
  • Adams JM, Warner M, Stenull O, Lubensky TC. (2008) 'Smectic-A elastomers with weak director anchoring'. PHYSICAL REVIEW E, 78 (1) Article number ARTN 011703
  • Adams JM, Mao Y, Vandoolaeghe WL. (2007) 'Stress relaxation in polymer networks: Equilibrium behavior and dynamics'. JOURNAL OF CHEMICAL PHYSICS, 127 (11) Article number ARTN 114907
  • Adams J, Conti S, DeSimone A. (2007) 'Soft elasticity and microstructure in smectic-$C$ elastomers'. Continuum Mechanics and Thermodynamics, 18 Article number 6 , pp. 319-319.
  • Adams JM, Warner M. (2006) 'Spontaneous shears in smectic elastomers'. PHYSICAL REVIEW E, 73 (3) Article number ARTN 031706
  • Stride JA, Adams JM, Johnson MR. (2005) 'Lattice modes of hexamethylbenzene studied by inelastic neutron scattering'. Chemical Physics, 317 Article number 2 , pp. 143-143.
  • Adams JM, Warner M. (2005) 'Soft elasticity in smectic elastomers'. PHYSICAL REVIEW E, 72 (1) Article number ARTN 011703
  • Adams JM, Warner M. (2005) 'Hairpin rubber elasticity'. EUROPEAN PHYSICAL JOURNAL E, 16 (1), pp. 97-107.
  • Adams JM, Warner M. (2005) 'Elasticity of smectic-A elastomers'. PHYSICAL REVIEW E, 71 (2) Article number ARTN 021708
  • Adams JM. (2004) 'On the polarization of chiral main-chain liquid-crystalline elastomers'. EUROPEAN PHYSICAL JOURNAL E, 14 (3), pp. 277-285.
  • Adams JM, Ivanov AS, Johnson MR, Stride JA. (2004) 'Cracking a chemical conundrum'. Physica B: Physics of Condensed Matter, 350 Article number 1 , pp. E351-E351.
  • Clarke SM, Messe L, Adams J, Inaba A, Arnold T, Thomas RK. (2003) 'A quantitative parameter for predicting mixing behaviour in adsorbed layers: the 2D isomorphism coefficient'. Chemical Physics Letters, 373 Article number 5 , pp. 480-480.

Teaching

  • Level 3/M Advanced Quantum Physics 2009-2013
  • Level 2 Energy and Entropy 2012-
  • Level 1 Mathematical and Computational Physics 2011-
  • Level 1 Mathematics III 2009-2011
  • Level 1 Scientific Investigation Skills 2011
  • Level 1 Small Group Tutorials 2009-

Departmental Duties

  • Level 1 Coordinator 2009-2014
  • Member of the Board of Studies Sub-Committee 2009-2014
  • Member of the Staff Student Liaison Committee 2009-
  • Chairman of the Board of Studies Sub-Committee 2014-
  • Chairman of the Board of Studies 2014-

Affiliations

  • Member of the Institute of Physics
  • Member of the British Society of Rheology

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Assembly date: Fri Feb 23 00:06:38 GMT 2018
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