Fracture and large strain behavior of self-assembled triblock copolymer gels

Soft Matter ◽  
2009 ◽  
Vol 5 (2) ◽  
pp. 447-456 ◽  
Author(s):  
Michelle E. Seitz ◽  
David Martina ◽  
Tristan Baumberger ◽  
Venkat R. Krishnan ◽  
Chung-Yuen Hui ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Large Strain ◽  
Strain Behavior ◽  
Copolymer Gels ◽  
Self Assembled

Continuum Description of the Time- and Strain-Dependent Poisson’s Ratio of Ligament Under Finite Deformation

2013 ◽  
Author(s):  
Aaron M. Swedberg ◽  
Shawn P. Reese ◽  
Steve A. Maas ◽  
Benjamin J. Ellis ◽  
Jeffrey A. Weiss
Keyword(s):  
Large Scale ◽  
Mechanical Response ◽  
Tensile Deformation ◽  
Large Strain ◽  
Fiber Direction ◽  
Strain Behavior ◽  
Nonlinear Stress ◽  
Poisson's Ratios ◽  
Poisson’S Ratios ◽  
Strain Dependent

Ligament volumetric behavior controls fluid and thus nutrient movement as well as the mechanical response of the tissue to applied loads. The reported Poisson’s ratios for tendon and ligament subjected to tensile deformation loading along the fiber direction are large, ranging from 0.8 ± 0.3 in rat tail tendon fascicles [1] to 2.98 ± 2.59 in bovine flexor tendon [2]. These Poisson’s ratios are indicative of volume loss and thus fluid exudation [3,4]. We have developed micromechanical finite element models that can reproduce both the characteristic nonlinear stress-strain behavior and large, strain-dependent Poisson’s ratios seen in tendons and ligaments [5], but these models are computationally expensive and unfeasible for large scale, whole joint models. The objectives of this research were to develop an anisotropic, continuum based constitutive model for ligaments and tendons that can describe strain-dependent Poisson’s ratios much larger than the isotropic limit of 0.5. Further, we sought to demonstrate the ability of the model to describe experimental data, and to show that the model can be combined with biphasic theory to describe the rate- and time-dependent behavior of ligament and tendon.

Structural Development and Adhesion of Acrylic ABA Triblock Copolymer Gels

1999 ◽  
Vol 32 (21) ◽  
pp. 7251-7262 ◽  
Author(s):  
Cynthia M. Flanigan ◽  
Alfred J. Crosby ◽  
Kenneth R. Shull
Keyword(s):  
Triblock Copolymer ◽  
Structural Development ◽  
Copolymer Gels ◽  
Aba Triblock Copolymer

Self-Assembly and Stress Relaxation in Acrylic Triblock Copolymer Gels

2007 ◽  
Vol 40 (4) ◽  
pp. 1218-1226 ◽  
Author(s):  
Michelle E. Seitz ◽  
Wesley R. Burghardt ◽  
K. T. Faber ◽  
Kenneth R. Shull
Keyword(s):  
Stress Relaxation ◽  
Self Assembly ◽  
Triblock Copolymer ◽  
Copolymer Gels

The Strength of Thick-Walled Cylinders

1959 ◽  
Vol 81 (2) ◽  
pp. 95-111 ◽  
Author(s):  
B. Crossland ◽  
S. M. Jorgensen ◽  
J. A. Bones
Keyword(s):  
Shear Stress ◽  
Mild Steel ◽  
Close Agreement ◽  
Large Strain ◽  
Tension Test ◽  
Experimental Results ◽  
Maximum Pressure ◽  
Strain Behavior ◽  
Pressure Tests ◽  
Strain Data

Comprehensive pressure tests have been carried out on thick-walled, closed-ended cylinders made from a mild steel and a hardened and tempered steel, the maximum pressure reached being 94,000 lb/in.2 The complete theoretical behavior of the cylinders is computed from shear stress-strain data obtained from torsion tests and is shown to be in very close agreement with the experimental results. In addition, a method is given for deriving the large strain behavior of the cylinders from tension test data. When compared with the experimental results this approach gives larger errors, the theoretical values of pressure being consistently high. Finally, ultimate pressures have been calculated from two empirical expressions.

“Butterfly”-like patterns of triblock copolymer gels as observed by small-angle neutron scattering

1996 ◽  
Vol 34 (16) ◽  
pp. 2739-2745 ◽  
Author(s):  
N. Mischenko ◽  
K. Reynders ◽  
K. Mortensen ◽  
N. Overberg ◽  
H. Reynaers
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Triblock Copolymer ◽  
Copolymer Gels

scholarly journals Multi-step control over self-assembled hydrogels of peptide-derived building blocks and a polymeric cross-linker

Soft Matter ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 432-440 ◽  
Author(s):  
Van Duc Nguyen ◽  
Asish Pal ◽  
Frank Snijkers ◽  
Mathieu Colomb-Delsuc ◽  
Giulia Leonetti ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Building Blocks ◽  
Cross Linker ◽  
Self Assembled ◽  
Step Control ◽  
Positively Charged

We present a detailed study of self-assembled hydrogels of bundled and cross-linked networks consisting of positively charged amyloid-like nanofibers and a triblock copolymer with negatively charged end blocks as a cross-linker.

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