体力作用下的断裂：一种易行的测试与分析
Fracture under body forces: An accessible test and analysis
- University of Illinois, Urbana–Champaign（伊利诺伊大学厄巴纳-香槟分校）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文提出一种仅靠自重加载的台式悬臂梁V形缺口测试，无需离心机即可研究体力驱动断裂，并首次验证了相关断裂理论。
AI中文摘要：
大型结构中的断裂——从失效的混凝土大坝到崩解的冰川——主要受自重控制。然而，由于这些系统规模巨大，直接研究其在重力作用下裂纹何时何地成核与扩展是不可行的。迄今为止，实验研究主要依赖于通过离心力在缩比试样中模拟自重，这需要专门的离心机设施。在本快报中，我们介绍一种简单的台式测试，无需上述基础设施。该方法利用一根含向下V形缺口的悬臂梁，仅由其自重加载。通过适当选择缺口几何形状、位置及梁的尺寸，该装置迫使裂纹在缺口尖端成核并以可测量的方式穿过试样扩展。我们在一可3D打印的砂浆上展示了该自重断裂测试的实用性，并使用最近在(\citeauthor{LPKFG2026}, 2026)中引入的断裂理论分析结果。此外，这些发现首次验证了体力驱动断裂的理论。
英文摘要：
Fracture in large-scale structures --- from failing concrete dams to calving glaciers --- is dominated by self-weight. Yet, owing to their immense scale, directly studying when and where cracks nucleate and propagate in these systems under gravity is unfeasible. To date, experimental investigations have largely relied on mimicking self-weight in scaled-down specimens via centrifugal forces, necessitating specialized centrifuge facilities. In this Letter, we introduce a simple benchtop test that bypasses the need for this infrastructure. The method utilizes a cantilever beam containing a downward-pointing V-notch, loaded solely by its self-weight. Through appropriate selection of the notch geometry and placement and the beam dimensions, the setup forces a crack to nucleate at the notch tip and propagate through the specimen in a measurable manner. We demonstrate the utility of this self-weight fracture test on a 3D-printable mortar and analyze the results using the fracture theory recently introduced in (\citeauthor{LPKFG2026}, 2026). \emph{Inter alia}, the findings provide a first validation of the theory for fracture driven by body forces.
