Adiabatic shear banding (ASB) is a dynamic failure mode characterized by large plastic strains in a narrow localized band. ASB occurs at high strain rates (ε ≥ 10~3 s~(-1)), under adiabatic conditions leading to a significant temperature rise inside the band [H. Tresca, Annales du Conservatoire des Arts et Metiers 4, (1879); Y. L. Bai and B. Dodd, Adiabatic Shear Localization-Occurrence, Theories, and Applications (Pergamon, Oxford, 1992); M. A. Meyers, Dynamic Behavior of Materials (Wiley, New York, 1994).; and J. J. Lewandowski and L. M. Greer, Nat. Mater. 5, 15 (2006)]. Large hydrostatic pressures are experienced in many dynamic applications involving ASB formation (e.g., ballistic penetration, impact, and machining). The relationship between hydrostatic pressure and ASB development remains an open question, although its importance has been often noted. This letter reports original experimental results indicating a linear relationship between the (normalized) dynamic deformation energy and the (normalized) hydrostatic pressure.
展开▼
机译：绝热剪切带（ASB）是一种动态破坏模式，其特征是在狭窄的局部带中存在较大的塑性应变。在绝热条件下，ASB以高应变率（ε≥10〜3 s〜（-1））发生，导致带内温度显着升高[H.特雷斯卡（Tresca），《音乐与艺术的第四纪年》（1879）； Y. L. Bai和B. Dodd，《绝热剪切定位-发生，理论和应用》（Pergamon，牛津，1992年）； M. A. Meyers，《材料的动态行为》（纽约威利，1994年）。 Nat。J. Lewandowski和L. M. Greer。母校5，15（2006）]。在涉及ASB形成的许多动态应用中（例如弹道穿透，冲击和机加工），都经历了较大的静水压力。静水压力和ASB的发展之间的关系仍然是一个悬而未决的问题，尽管它的重要性经常被注意到。这封信报道了原始实验结果，表明（规范化的）动态变形能与（规范化的）静水压力之间存在线性关系。
展开▼
