水凝胶断裂中的魔角和交叉影线不稳定性
Magic angles and cross-hatching instability in hydrogel fracture
摘要：
由明胶凝胶中的准静态裂纹扩展产生的断裂表面的粗糙度轮廓的全2D分析揭示了原始行为，其特征在于（i）在与$V$无关的保角处具有最大粗糙度的强各向异性，（ii）在临界速度以下导致亚临界不稳定性，交叉阴影制度，由于直macrostep漂移在相同的魔角和成核裂纹钉扎网络的不均匀性。台阶高度值由应变硬化区的宽度决定，由断裂应力远大于低应变模量的软固体的弹性裂纹钝化特性决定。
英文摘要：
The full 2D analysis of roughness profiles of fracture surfaces resulting from quasi-static crack propagation in gelatin gels reveals an original behavior characterized by (i) strong anisotropy with maximum roughness at $V$-independent symmetry-preserving angles, (ii) a sub-critical instability leading, below a critical velocity, to a cross-hatched regime due to straight macrosteps drifting at the same magic angles and nucleated on crack-pinning network inhomogeneities. Step height values are determined by the width of the strain-hardened zone, governed by the elastic crack blunting characteristic of soft solids with breaking stresses much larger that low strain moduli.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
