Frank Wuttke
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View article: Damage plasticity modeling of concrete block masonry materials: Numerical and experimental study
Damage plasticity modeling of concrete block masonry materials: Numerical and experimental study Open
Masonry walls constructed of brick or block units have tended to suffer more serious damage when subjected to loads of both static and cyclic (such as an earthquake) nature as compared to other concrete or steel structures. Hence, the stat…
View article: Study on the incorporation of phase change material and differently embedded water circulation pipes for enhanced thermal management of photovoltaic system
Study on the incorporation of phase change material and differently embedded water circulation pipes for enhanced thermal management of photovoltaic system Open
This research presents an experimental investigation on the thermal management and improvement of electrical efficiency of photovoltaic (PV) systems employing a phase change material (PCM) and water combination technique as heat dissipatio…
View article: Optimizing the fracture resistance of clay liners through fiber content and moisture control
Optimizing the fracture resistance of clay liners through fiber content and moisture control Open
Structural integrity of clay liners in engineered waste landfills depends critically on their ability to resist the initiation and propagation of cracks under variable moisture conditions. In this study, the improvement of Mode I Fracture …
View article: Slip-tendency analysis of a potential CO2 storage site in the central German North Sea
Slip-tendency analysis of a potential CO2 storage site in the central German North Sea Open
Underground CO2 storage operations may lead to induced seismicity, which can be partially related to nearby affected faults. Considering the storage potential in the Middle Buntsandstein sandstone formation on the West Schleswig Block with…
View article: MicrocrackAttentionNext: Advancing Microcrack Detection in Wave Field Analysis Using Deep Neural Networks Through Feature Visualization
MicrocrackAttentionNext: Advancing Microcrack Detection in Wave Field Analysis Using Deep Neural Networks Through Feature Visualization Open
Microcrack detection using deep neural networks (DNNs) through an automated pipeline using wave fields interacting with the damaged areas is highly sought after. However, these high-dimensional spatio–temporal crack data are limited. Moreo…
View article: Hybrid neural network method for damage localization in structural health monitoring
Hybrid neural network method for damage localization in structural health monitoring Open
The detection of cracks in large structures is of critical importance, as such damage can result not only in significant financial costs but also pose serious risks to public safety. Many existing methods for crack detection rely on deep l…
View article: Unveiling soil thermal behavior under ultra-high voltage power cable operations
Unveiling soil thermal behavior under ultra-high voltage power cable operations Open
The optimal operation of high-voltage underground power cables is crucial for powering our communities, and it hinges on the intricate dynamics of insulation temperature around the conductor, primarily influenced by joule heating. This tem…
View article: Thermal, Electrical, and Economic Performance of a Hybrid Solar-Wind-Geothermal System: Case Study of a Detached House in Hamburg and Sylt, Germany
Thermal, Electrical, and Economic Performance of a Hybrid Solar-Wind-Geothermal System: Case Study of a Detached House in Hamburg and Sylt, Germany Open
Germany is undergoing an energy transition. By 2045, fossil fuels will be gradually replaced by clean energy. An alternative option is to use geothermal, solar and wind energy to generate heat or electricity. Currently, an economic model t…
View article: Dynamic impedance and compliance surfaces of twin adjacent surface foundations under synchronous and asynchronous loads
Dynamic impedance and compliance surfaces of twin adjacent surface foundations under synchronous and asynchronous loads Open
The 3D dynamic response of twin rigid massless foundations under concurrent time-harmonic loads in a finite soil region resting on a homogeneous visco-elastic half-space is studied. The mechanical model is based on an efficient approach co…
View article: Physics-Informed Neural Networks for High-Frequency and Multi-Scale Problems Using Transfer Learning
Physics-Informed Neural Networks for High-Frequency and Multi-Scale Problems Using Transfer Learning Open
Physics-Informed Neural Network (PINN) is a data-driven solver for partial and ordinary differential equations (ODEs/PDEs). It provides a unified framework to address both forward and inverse problems. However, the complexity of the object…
View article: Physics-Informed Neural Networks for High-Frequency and Multi-Scale Problems using Transfer Learning
Physics-Informed Neural Networks for High-Frequency and Multi-Scale Problems using Transfer Learning Open
Physics-informed neural network (PINN) is a data-driven solver for partial and ordinary differential equations(ODEs/PDEs). It provides a unified framework to address both forward and inverse problems. However, the complexity of the objecti…
View article: Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements
Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements Open
Ground source heat pumps (GSHPs) are highly efficient for heating and cooling buildings. Among the different types of ground source heat pumps, horizontal ground heat exchangers (HGHEs) gaining popularity due to their cost-effectiveness, e…
View article: Thermal conductivity of dried biocemented sand at higher calcification
Thermal conductivity of dried biocemented sand at higher calcification Open
MICP-treated sand has been used for many soil stabilisation and erosion protection applications [10] with different bacteria types and paths of biocement generation. A novel application of the method is in the improvement of soil for energ…
View article: Multi-disciplinary characterization of shrinkage effects in Opalinus clay
Multi-disciplinary characterization of shrinkage effects in Opalinus clay Open
Due to its low hydraulic permeability and several beneficial mechanical properties, Opalinus Clay formation (OPA) is considered as a potential host rock for high-level radioactive waste disposal. However, several factors during the excavat…
View article: Deep Neural Networks for Crack Detection Inside Structures
Deep Neural Networks for Crack Detection Inside Structures Open
Crack detection is a long-standing topic in structural health monitoring. Conventional damage detection techniques rely on intensive, time-consuming, resource-intensive intervention. The current trend of crack detection emphasizes using de…
View article: Low Frequency Cyclic Mechanical Loading of Till Deposits from Northern Germany under Oedometric Conditions
Low Frequency Cyclic Mechanical Loading of Till Deposits from Northern Germany under Oedometric Conditions Open
Glacial deposits are of significant importance to geotechnical engineers and geologists in northern Europe, North America, and Northern Asia, as vast areas of these land surfaces were historically covered with ice leading to the formation …
View article: Effect of gravel content on soil water retention characteristics and thermal capacity of sandy and silty soils
Effect of gravel content on soil water retention characteristics and thermal capacity of sandy and silty soils Open
The presence of gravel in soils modifies the porosity, pore connectivity and pore size distribution in the soil matrix as well as the soil matrix-gravel interfaces. The aim of the present study is to investigate the effect of relative volu…
View article: Synthesis and Outlook
Synthesis and Outlook Open
The principal interest of the GeomInt project consists of the investigation of effects on barrier integrity of three host rock formations: clay, salt and crystalline. The project focuses on distinct physical processes that can influence ba…
View article: GeomInt—Discontinuities in Geosystems From Lab to Field Scale
GeomInt—Discontinuities in Geosystems From Lab to Field Scale Open
This open access book presents the use of the geological subsurface in the sense of a regional resource and complements the previous basic book
View article: Hydro-Mechanical Effects and Cracking in Opalinus Clay
Hydro-Mechanical Effects and Cracking in Opalinus Clay Open
In this chapter, we investigate hydro-mechanical effects in the Opalinus Clay, especially those leading to cracking. We present a methodology comprising laboratory and field scale experiments, as well as the development and application of …
View article: Introduction to GeomInt2
Introduction to GeomInt2 Open
GeomInt2 is the follow-up project to the joint project “Geomechanical Integrity of Host and Barrier Rocks—Experiment, Modelling and Analysis of Discontinuities (GeomInt)”. The results of GeomInt made essential contributions to the analysis…
View article: A Cyclic Multi-Stage Implementation of the Full-Waveform Inversion for the Identification of Anomalies in Dams
A Cyclic Multi-Stage Implementation of the Full-Waveform Inversion for the Identification of Anomalies in Dams Open
For the safe and efficient operation of dams, frequent monitoring and maintenance are required. These are usually expensive, time consuming, and cumbersome. To alleviate these issues, we propose applying a wave-based scheme for the locatio…
View article: Neural Network Approaches for Computation of Soil Thermal Conductivity
Neural Network Approaches for Computation of Soil Thermal Conductivity Open
The effective thermal conductivity (ETC) of soil is an essential parameter for the design and unhindered operation of underground energy transportation and storage systems. Various experimental, empirical, semi-empirical, mathematical, and…
View article: Enhancement of In-Plane Seismic Full Waveform Inversion with CPU and GPU Parallelization
Enhancement of In-Plane Seismic Full Waveform Inversion with CPU and GPU Parallelization Open
Full waveform inversion is a widely used technique to estimate the subsurface parameters with the help of seismic measurements on the surface. Due to the amount of data, model size and non-linear iterative procedures, the numerical computa…
View article: Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method
Study of wave propagation in discontinuous and heterogeneous media with the dynamic lattice method Open
The development of a new dynamic lattice element method (dynamicLEM) as well as its application in the simulation of the propagation of body waves in discontinuous and heterogeneous media is the focus of this research paper. The convention…