Nicolò Spiezia

Nicolò Spiezia
University of Padova | UNIPD · Department of Civil, Environmental and Architectural Engineering ICEA

PhD

About

20
Publications
2,616
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73
Citations
Additional affiliations
January 2015 - April 2016
University of Padova
Position
  • Assistant Researcher

Publications

Publications (20)
Conference Paper
Modern engineering applications require the solution of linear systems of millions or even billions of equations. The solution of the linear system takes most of the simulation for large scale simulations, and represent the bottleneck in developing scientific and technical software. Usually, preconditioned iterative solvers are preferred because of...
Preprint
Full-text available
The numerical simulation of the physical systems has become in recent years a fundamental tool to perform analyses and predictions in several application fields, spanning from industry to the academy. As far as large scale simulations are concerned, one of the most computationally expensive task is the solution of linear systems arising from the di...
Chapter
Monitoring landslides and potentially unstable areas is of primary importance for the landslide risk assessment and for the identification of the proper mitigation measures. The advanced topographic techniques, such as aerial drone and laser scanner survey, are very good alternatives to the classical survey with total topographic station, because t...
Article
A 3D elasto‐plastic rate‐dependent model for rock mechanics is formulated and implemented into a Finite Element (FE) numerical code. The model is based on the approach proposed by Vermeer and Neher (A soft soil model that accounts for creep. In: Proceedings of the International Symposium “Beyond 2000 in Computational Geotechnics,” pages 249‐261, 19...
Article
The numerical simulation of structural mechanics applications via finite elements usually requires the solution of large-size linear systems, especially when accurate results are sought for derived variables, like stress or deformation fields. Such a task represents the most time-consuming kernel, and motivates the development of robust and efficie...
Preprint
Full-text available
The numerical simulation of structural mechanics applications via finite elements usually requires the solution of large-size and ill-conditioned linear systems, especially when accurate results are sought for derived variables interpolated with lower order functions, like stress or deformation fields. Such task represents the most time-consuming k...
Preprint
Full-text available
The numerical simulation of structural mechanics applications via finite elements usually requires the solution of large-size and ill-conditioned linear systems, especially when accurate results are sought for derived variables interpolated with lower order functions, like stress or deformation fields. Such task represents the most time-consuming k...
Article
Numerical modeling of geomechanical phenomena and geo-engineering problems often involves complex issues related to several variables and corresponding coupling effects. Under certain circumstances, both soil and rock may experience a nonlinear material response caused by, for example, plastic, viscous, or damage behavior or even a nonlinear geomet...
Article
In the numerical simulation of structural problems, a crucial aspect concern the solution of the linear system arising from the discretization of the governing equations. In fact, ill-conditioned system, related to an unfavorable eigenspectrum, are quite common in several engineering applications. In these cases the Preconditioned Conjugate Gradien...
Article
Predicting the deformations of deep reservoirs due to fluid withdrawal/injection is a challenging task that could have important environmental, social, and economical impacts. Finite element models, if endowed with an appropriate constitutive law, represent a useful tool for computing the displacements, the deformations, and the stress distribution...
Poster
Full-text available
Three dimensional numerical simulation of shallow tunnel excavation
Article
Predicting plastic deformation and localization band around a wellbore drilled through a porous rock is a challenging task that could have important implications for the prediction of instability and sand production. This study focuses on analyzing stress field, plastic zones, and localized deformations around a horizontal borehole drilled at a gre...
Conference Paper
Full-text available
The numerical simulation of a consolidation process undergoing large strains is a challenging task that requires the formulation and the solution of the coupled solid-deformation/fluid-diffusion problem within a changing geometry. Deformations can be rigorously taken into account with the classical Finite Element Method (FEM) based on continuum mec...
Article
Full-text available
Wellbore instability, in particular in deep perforations, continues to be one of the major problem in the oil and gas industry, that can dramatically increase production costs. Eventual instabilities may be prevented supporting temporarily the wellbore with mud circulation. If instability may occur, the value of the mud pressure needs to be suffici...
Poster
Non-linear FEM analysis of a horizontal wellbore drilled through a porous rock formation

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