Extreme strain localization and sliding friction in physically associating polymer gels.
Extreme strain localization and sliding friction in physically associating polymer gels.
复制标题
物理缔合聚合物凝胶中的极端应变局部化和滑动摩擦。
作者：
K. Erk;J. Martin;Y. T. Hu;K. Shull
模型物理相关联的凝胶在剪切变形在很大范围内减少率显示的证据应变本地化。在剪切流变仪与粒子跟踪测速仪的耦合过程中观察到的非线性应力响应和不均匀的速度分布与发生率相关的条带和凝胶中的类似反应。从传统的滑动摩擦研究的标度律分析表明，在分子水平上，变形被限制在剪切区的厚度可比的网格大小的凝胶，在凝胶中的最小结构相关的长度尺度。
Model physically associating gels deformed in shear over a wide range of reduced rates displayed evidence of strain localization. The nonlinear stress responses and inhomogeneous velocity profiles observed during shear rheometry coupled with particle tracking velocimetry were associated with the occurrence of rate-dependent banding and fracture-like responses in the gel. Scaling law analysis from traditional sliding friction studies suggests that, at the molecular level, deformation is confined to a shear zone with thickness comparable to the mesh size of the gel, the smallest structurally relevant length scale in the gel.
影响因子：
5.5
作者：
Olsen BD;Kornfield JA;Tirrell DA
通讯作者：
Tirrell DA