CAREER: An Integrated Dissipative Modeling Framework for the Long-Term Assessment of Geohazards

职业：地质灾害长期评估的综合耗散模型框架

基本信息

批准号：
2042325
负责人：
Emmanouil Veveakis
金额：
$ 58.02万
依托单位：
Duke University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-09-01 至 2026-08-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2042325&HistoricalAwards=false
关键词：
CAREER Integrated Dissipative Modeling Framework

项目摘要

This Faculty Early Career Development (CAREER) award focuses on developing an integrated modeling approach –combining predictive modeling and simulations with optimal experimental selection— and monitoring protocols to predict and mitigate man-made and natural Geohazards. Examples of such Geohazards include landslides, debris and mudflows, sinkholes, over-pressurized underground zones, barriers and disposal sites, volcanoes, and earthquakes. They are often devastating in casualties and infrastructure damage, and remain largely unpredictable. These Geohazards evolve on very long time-scales, of years or more, extend to field dimensions exceeding hundreds of meters, involve the response of Geomaterials prone to internal microstructural changes and transformations (like clays, shales, sandstones, mudstones, limestones), and display complex loading conditions, often involving heat and/or overpressures in the presence of chemically active fluids. Through a combination of techniques from multiple disciplines, the project provides a major step towards demonstrating how interdisciplinary, energetic approaches may link processes operating at different scales. The aim is to develop a dissipative framework at the field scale using material information from the lower scales to assess the long-term potential of both man-made and natural Geohazards. The research is complemented by innovative educational tools –such as an interactive 3D simulator—and an outreach program based on project-based curriculum development targeting a broad audience to make geotechnical engineering a gender-equal discipline.The specific goal of the research is to understand and quantify the dominant physics governing the response of materials in the long-term conditions frequently encountered in Geohazards. This will be achieved by developing and testing an integrated framework combining experimental, theoretical and numerical developments, where information from material science analyses at the small scales is assimilated in a computationally-assisted constitutive framework through nested multi-scale numerical approaches, and validated through state-of-the-art experiments, before being upscaled to the field scale. Thus the objectives of this project include: (i) bringing together concepts from disciplines including material science, soil and rock mechanics, solid and fluid mechanics, chemical engineering, thermodynamics, computational mechanics, and applied mathematics and physics, in order to identify and constrain the laws governing the long-term response of geomaterials; (ii) quantifying the energy budget of dissipative structures through multi-scale modeling, calibrated via testing in which both the microstructure and the average temperature are continuously monitored; (iii) predicting the response of selected Geohazards from microstructural data and continuous monitoring. The research project has the capability of offering unique and transformative knowledge on the response of Geomaterials in long-term, multi-physical loading, as well as deep insights into the mechanical and physical processes operating in Geohazards.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该学院早期职业发展（CAREER）奖的重点是开发一种综合建模方法——将预测建模和模拟与最佳实验选择相结合——以及监测协议来预测和减轻人为和自然地质灾害的例子，包括山体滑坡、碎片和地质灾害。泥石流、天坑、超压地下区域、障碍物和处置场、火山和地震往往会造成人员伤亡和基础设施破坏，而且这些地质灾害在很大程度上仍难以预测。年或更长时间的时间尺度，延伸到超过数百米的现场尺寸，涉及容易发生内部微观结构变化和转变的岩土材料（如粘土、页岩、砂岩、泥岩、石灰岩）的响应，并且通常显示复杂的载荷条件通过结合涉及多个学科的技术，该项目向展示跨学科、充满活力的方法如何将不同规模的过程联系起来迈出了重要的一步。旨在利用较低尺度的材料信息开发现场尺度的耗散框架，以评估人为和自然地质灾害的长期潜力。该研究得到创新教育工具（例如交互式 3D 模拟器）的补充。一项以项目为基础的课程开发的外展计划，面向广泛的受众，使岩土工程成为一门性别平等的学科。该研究的具体目标是了解和量化控制材料在长期条件下频繁响应的主导物理学遇到于这将通过开发和测试一个结合实验、理论和数值发展的综合框架来实现，其中小尺度材料科学分析的信息通过嵌套的多尺度数值方法被吸收到计算辅助的本构框架中，并得到验证。通过最先进的实验，然后扩大到现场规模，因此该项目的目标包括：（i）汇集材料科学、土壤和岩石力学、固体和流体力学、化学工程等学科的概念。 ,热力学、计算力学以及应用数学和物理学，以确定和约束控制岩土材料长期响应的规律；(ii) 通过多尺度建模量化耗散结构的能量预算，并通过测试进行校准，其中连续监测微观结构和平均温度；（iii）根据微观结构数据和连续监测预测选定地质灾害的响应，该研究项目有能力提供有关岩土材料长期响应的独特和变革性知识。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

The physics of desiccation cracks 2: Modeling and prediction of the crack patterns

干燥裂纹的物理学 2：裂纹模式的建模和预测

DOI：
10.1016/j.gete.2023.100489
发表时间：
2023-07-01
期刊：
Geomechanics for Energy and the Environment
影响因子：
5.1
作者：
Ruoyu Chen;Winston Lindqwister;Fei Wu;B. Mielniczuk;T. Hueckel;M. Veveakis
通讯作者：
M. Veveakis

The physics of desiccation cracks 1: Ductile fracturing and dependence on relative humidity

干燥裂纹的物理原理 1：延性断裂和相对湿度的依赖性

DOI：
10.1016/j.gete.2023.100488
发表时间：
2023-07-01
期刊：
Geomechanics for Energy and the Environment
影响因子：
5.1
作者：
Ruoyu Chen;Winston Lindqwister;Fei Wu;B. Mielniczuk;T. Hueckel;M. Veveakis
通讯作者：
M. Veveakis

The Brittle–Ductile Transition and the Formation of Compaction Bands in the Savonnières Limestone: Impact of the Stress and Pore Fluid

萨沃尼埃石灰岩中的脆性-延性转变和压实带的形成：应力和孔隙流体的影响

DOI：
10.1007/s00603-022-02963-z
发表时间：
2022-01
期刊：
Rock Mechanics and Rock Engineering
影响因子：
6.2
作者：
Sari, Mustafa;Sarout, Joel;Poulet, Thomas;Dautriat, Jeremie;Veveakis, Manolis
通讯作者：
Veveakis, Manolis

Influence of cementation on the yield surface of rocks numerically determined from digital microstructures

数字显微结构数值确定胶结作用对岩石屈服面的影响