Crystalline nanowires exhibiting a wide range of size-dependent fracture and failure modes have been extensively studied, yet the fracture behaviors of amorphous materials and their size dependence remain elusive. Here extensive atomistic simulations are performed to reveal the deformation and fracture behaviors in a broad class of amorphous nanowires with varying sizes, including CuZr, CuZrAl, FeP, Si, and a ductile Lennard-Jones system. It is found that the fracture strain ${\varepsilon }_{\mathrm{f}}$ increases with nanowire length $L$ but decreases with diameter $D$, which exhibits a linear relationship with the diameter-to-length ratio as ${\varepsilon }_{\mathrm{f}}\propto D/L$, —a scaling law valid in these five distinct glassy systems understudied. We develop a theoretical model, capturing the size of plastic zone at plastic yielding and its vital role in governing the final fracture strain, which shows an agreement with the simulation data. By taking into account the intrinsic atomic-level ideal strain, remarkably, all the size-dependent fracture strain data collapse, signifying the universality of fracture nature in a broad range of glassy materials.

晶体纳米线表现出广泛的尺寸依赖性断裂和失效模式已被广泛研究，但非晶材料的断裂行为及其尺寸依赖性仍然难以捉摸。这里进行了广泛的原子模拟，以揭示一大类不同尺寸的非晶纳米线的变形和断裂行为，包括 CuZr、CuZrAl、FeP、Si 和延展性 Lennard-Jones 系统。发现断裂应变${\epsilon }_{\mathrm{F}}$随纳米线长度增加$\mathrm{大号}$但随直径减小$丁$, 它与直径长度比呈线性关系为${\epsilon }_{\mathrm{F}}\propto 丁/\mathrm{大号}$, - 在这五个不同的玻璃系统中有效的比例定律正在研究中。我们开发了一个理论模型，捕获塑性屈服时塑性区域的大小及其在控制最终断裂应变中的重要作用，这与模拟数据一致。通过考虑固有的原子级理想应变，值得注意的是，所有与尺寸相关的断裂应变数据都崩溃了，这表明断裂性质在广泛的玻璃材料中具有普遍性。