报告题目
Novel Computational Approaches for Simulation of Geomechanical Deformation and Failure Behaviour using Mesh-Less Methods
主讲人
Prof. Raj Das（RMIT University）
2025年9月27日（星期六）
10:30-12:00
报告地点
浙江大学紫金港校区·安中大楼A326
Developments in novel numerical methods for computational modelling of large scale geomechanical structures will be presented in this seminar. A mesh-free numerical modelling approach, called Smoothed Particle Hydrodynamics (SPH) for simulation of large scale geomechanical deformation and fractures will be introduced. A number of extensions of the SPH method incorporating material discontinuity and damage models required for modelling geomechanical behaviour will be described in this presentation. The broad applications areas to be encompassed include rock fracture and fragmentation in mineral exploration, mining, and rock slope analysis problems. The strengths of SPH in gaining fundamental insights of complex geomechanical system will be illustrated with reference to several examples, such as earthquake response of dams, failure behaviour of long-wall coal mines, rock slope stability analysis, and mineral transport and deposition due to magma intrusion A specific highlight of the work is a novel modelling approach using a mesh-free method for simulation of geological and mineral system formation, that focuses on rock fracture development associated with volcanic lava (magma) flow and magmatic intrusion. A generic geological system that represents a magmatic body intruded into upper-crustal rocks typical of the Yilgarn Craton of Western Australia is modelled using SPH in order to explore patterns of fracture development around such a body. A coupled elastic deformation-fluid flow-thermal analysis is conducted to model the fracturing of rocks surrounding the magmatic intrusion, including the effects of pre-tensile and pre-compressive geotechnical strains in the rocks. The SPH method was found to be effective in capturing discrete fracturing processes caused by intruding magma which cannot be easily simulated using the Finite Element Method (FEM). The SPH model predicted fracture patterns in the rocks that were found to compare well with geological structures observed in nature. This study establishes SPH as a useful computational tool to understand the influence of intruding magmas on rock deformation and fracture development that has important implications on fracture and vein formation, magma and fluid flow migration and hence associated mineralisation.
主讲人简介
Prof Raj Das is the Full Professor of Applied Mechanics and leads the ‘Simulation of Advanced Materials and Structures (SAMS)’ research group in the ‘Sir Lawrence Wackett Defence and Aerospace Centre’ of RMIT University (Australia). He is the ‘Program Director’ in the Aerospace Engineering and Aviation discipline of the School of Engineering. He is also an honorary academic in the University of Auckland, New Zealand and the University of Quebec, Canada.
Prof Das has nearly 20 years of experience in the design, analysis and optimisation of engineering materials and structures with a focus on computational mechanics, structural optimisation, composite structures, failure analysis, and damage tolerance design. Prof Das has published more than 400 papers in international journals and conferences in collaboration with several universities, institutes and industries. Prof Das has a PhD from Monash University, Australia in Applied Mechanics, and has previously worked in the University of Auckland (New Zealand), the Commonwealth Scientific and Industrial Research Organisation (Australia), and the University of Manchester (UK).Prof Das is associated with various scientific and technical societies broadly related to Theoretical and Applied Mechanics. He is currently the President of the 'International Congress on Mechanical Behaviour of Materials (ICM)' and represents Australia as a ‘Director’ in the Executive Committee of the 'International Congress on Fracture (ICF)'. He is also the Chair of the ‘Australia Section of the American Society of Mechanical Engineers’. Within Australia, Prof Das serves as the Chair of the ‘National Committee on Applied Mechanics’ and in the executive committee of the ‘National Committee on Space Engineering’ of Engineers Australia. Prof Das has been elected as a ‘Fellow’ of Engineers Australia (FIEAust). He has chaired/co-chaired several well-known conferences (ICM-13, ACAM-8, ACCM-3, ICCM-6, etc). Prof Das has been granted several national and international awards and fellowships, including the ‘Science Award’ by the Sustainable Aviation and Energy Research Society, ‘RMIT Team Award for Impact and Collaboration as part of the Multifunctional Composite Materials Group, ‘Computational Methods Award’ by ICCM, ‘Jim & Hazel D. Lord Emerging Faculty Fellowship’, ‘Research Excellence Award’, and ‘AUEA Emerging Researcher Award’ by the University of Auckland. He has received the ‘CONICYT award’ from the Government of Chile, ‘Certificate of Merit Award’ from the International Association of Engineers, Hong Kong, ‘UQAC Visiting Fellowship’ from the University of Quebec, Canada, and ‘Visiting Researcher Fellowships’ from the Sapienza University, Italy and the University of Cape Town, South Africa.
承办单位
浙江省力学学会岩土力学与工程专业委员会、浙江省岩土力学与工程学会本构理论与数值分析专业委员会、浙江省岩土力学与工程学会交通岩土工程专业委员会、浙江大学岩土工程计算中心