Specimen Geometry and Size Effects on the Fracture of River and Lake Ice

样本几何形状和尺寸对河流和湖泊冰断裂的影响

• 批准号: 8618798
• 负责人: John Dempsey
• 金额: $ 20.79万
• 依托单位: Clarkson University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-03-15 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8618798&HistoricalAwards=false
• 关键词: Specimen; Geometry; Size; Effects; Fracture

The primary motivation for fracture research on ice is related to the prediction of maximum load-transmitting capability and the minimum load- bearing capacity of ice masses. This proplem is common to most engineering applications involving ice: i.e., loads on arctic structures, bridge piers, ships, and bearing capacity of ice islands, ice roads airstrips, etc. The specific objective of the proposed research is to investigate the effect of loading rate, testing temperature, and microstructure of fresh water ice on its fracture toughness. Preliminary to such studies, the effect of specimen size and shape will be established. Three types of ice that are common on many nortnern rivers and lakes during winter will be examined. The information obtained in this research will be extremely useful for the prediction of maximum load-carrying capacity of ice; and it will lead to the establishment of standardized fracture testing techniques for ice. The PI ie highly qualified to conduct the proposed research. An award is recommended.

冰断裂研究的主要动机与 最大传荷能力和最小传荷能力的预测- 冰的承载能力。 这个问题对大多数人来说都是常见的。 涉及冰的工程应用：即，北极负载 建筑物、桥墩、船舶、冰岛承载力， 冰路飞机跑道等。拟议的具体目标 研究是调查加载速率的影响，测试 淡水冰断裂面微观结构 韧性 在这些研究的初步阶段， 形将建立。 三种常见的冰 将检查冬季的北方河流和湖泊。 的 在这项研究中获得的信息将是非常有用的 预测冰的最大承载能力;这将导致 冰的标准化断裂测试技术的建立。 PI具有进行拟议研究的高资质。 一个奖项 建议。