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首页> 外文期刊>Journal of Materials Research >Sharp probes of varying acuity: Instrumented indentation and fracture behavior
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Sharp probes of varying acuity: Instrumented indentation and fracture behavior

机译：敏锐度不同的探头：仪器压痕和断裂行为

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摘要

The fracture and instrumented indentation behavior of a range of materials subjected to indentation by four sharp probes varying in acuity from the Berkovich to the cube-comer was studied. Quantities derived from load, displacement, and continuous stiffness measurements were evaluated for their ability to detect "pop-in"--sudden displacement excursions associated with fracture. It was found that gross unloading character was sensitive to the presence of fracture, even when no pop-in was detected. This may be useful in the development of fracture toughness estimation models that do not rely on the imaging of cracks.
机译：研究了通过从贝氏（Berkovich）到立方角的不同敏锐度的四个尖锐探针对一系列材料进行压痕的断裂和仪器压痕行为。评估了从载荷，位移和连续刚度测量得出的数量，以检测其与断裂相关的“弹入”（突然发生的位移）偏移的能力。已经发现，即使没有发现弹跳，总的卸载特性对裂缝的存在也很敏感。这在不依赖裂缝成像的断裂韧性估算模型的开发中可能很有用。

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