Dynamic Behavior of Pre-Fractured Brittle Materials

预断裂脆性材料的动态行为

• 批准号: RGPIN-2016-04685
• 负责人: Hogan, James
• 金额: $ 2.48万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=685228
• 关键词: Dynamic; Behavior; Pre; Fractured; Brittle

Understanding the dynamic failure of brittle materials is important in many Canadian industries, including ceramic body armor used in defense, and blasting and crushing operations of rock used in the oil and gas, and mining industries. These applications involve dynamic loading conditions and cover many types of ceramics and rocks. These materials will behave and fail differently during loading, and this is influenced by their microstructures and properties.In this research program, we want to understand how the microstructure and material properties are linked to mechanisms that are activated during dynamic failure. The short-term objective of the program is to develop predictive models for the compressive strength and fragmentation of pre-fractured brittle materials that incorporate microstructure and mechanical properties. This will be accomplished through a series of characterization, experimental and theoretical tasks. Ultimately, we want to improve the performance of brittle materials used in Canadian industry by controlling their failure, strength, and fragmentation. This is accomplished through the design of new advanced materials and improved industrial processes.***Through the next five years, the program will train two PhD students, and one undergraduate student per semester, and we will make contributions to two strategic research areas defined by NSERC:******1. Manufacturing- Material Systems: Insights will be applied to the design of lighter and more effective ceramic materials used for body armor by controlling and optimizing their chemical and physical structures. Modern soldiers carry upwards of 120 lbs in gear and 30 lbs in body armor during missions, which severely burdens their mobility. By developing new materials, we will increase the tactical efficiency of soldiers and, more importantly, save lives.******2. Natural Resources- Optimizing Resource Extraction, Harvesting, and Renewal: Insights will be applied to improving the efficiency of blasting and crushing operations used in the oil and gas, and mining industries. Currently, these operations account for 5% of the world's electrical energy consumption, and are extremely inefficient with ~1% of the input energy being used to fracture the rock. Through our research, we will be able to improve current industrial processes by identifying more effective operating regimes so as to reduce the amount of energy needed to yield desirable fragmentation outcomes. As a result, this will yield multi-million dollars in economic benefits to Canada, and will reduce our environmental impact.******The long-term objective of the program is to establish specializations beyond energy and defense, focusing on Health-related challenges (e.g., effective delivery of X-rays for kidney stone fragmentation).**

在许多加拿大工业中，了解脆性材料的动态故障至关重要，包括用于防御的陶瓷身体，以及用于石油和天然气中使用的岩石的爆炸和压碎操作以及采矿业。这些应用涉及动态加载条件，并涵盖了许多类型的陶瓷和岩石。这些材料在加载过程中的表现和失败会有所不同，这受其微观结构和特性的影响。在本研究计划中，我们想了解微观结构和材料属性如何与在动态故障过程中激活的机制有关。该程序的短期目标是开发预测模型，以构成微结构和机械性能的易碎脆性材料的抗压强度和破碎。这将通过一系列表征，实验和理论任务来实现。最终，我们希望通过控制其失败，力量和分裂来提高加拿大行业中使用的脆性材料的性能。这是通过设计新的高级材料和改进工业流程的设计来实现的。制造材料系统：通过控制和优化其化学和物理结构，将洞察力应用于较轻，更有效的陶瓷材料的设计。在任务期间，现代士兵的装备量超过120磅，防弹衣的30磅，这会严重负担其机动性。通过开发新材料，我们将提高士兵的战术效率，更重要的是挽救生命。****** 2。自然资源 - 优化资源提取，收获和更新：将采用洞察力来提高石油和天然气以及采矿业中使用的爆破和破碎操作的效率。目前，这些操作占全球电能消耗的5％，并且效率极高，约有1％用于破裂岩石的输入能量。通过我们的研究，我们将能够通过确定更有效的运营制度来改善当前的工业流程，从而减少产生理想的分裂结果所需的能量。结果，这将为加拿大带来数百万美元的经济利益，并将减少我们的环境影响。