تقرير
Yielding under the microscope: a multi-scale perspective on brittle and ductile behaviors in oscillatory shear
| العنوان: | Yielding under the microscope: a multi-scale perspective on brittle and ductile behaviors in oscillatory shear |
|---|---|
| المؤلفون: | Edera, P., Brizioli, M., Madani, M., Ngouamba, E., Coussot, P., Trappe, V., Petekidis, G., Giavazzi, F., Cerbino, R. |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter |
| الوصف: | We study the yielding transition in soft jammed materials under oscillatory shear, employing a novel methodology that combines rheological measurements with detailed dynamical observations. This method provides a comprehensive view of the intricate interactions between macroscopic mechanical behavior, mesoscopic deformation patterns, and microscopic dynamics during yielding. Our findings reveal two distinct yielding behaviors: at one end, a smooth, uniform transition, characterized by homogeneous strain fields, and Fickian, Gaussian microscopic dynamics; at the other, a sharp transition defined by pronounced shear banding, with the dynamics within shear bands being governed exclusively by the local strain, and exhibiting non-Gaussian, cooperative nature. The viscoplastic fragility emerges as a key macroscopic predictor of these intricate behaviors across micro- and meso-scales, providing a new perspective to understand and quantify ductile and brittle yielding in soft materials. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2402.00221 |
| رقم الأكسشن: | edsarx.2402.00221 |
| قاعدة البيانات: | arXiv |
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