Searched for: subject%3A%22Strain%22
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Chang, L. (author), Dollevoet, R.P.B.J. (author), Hanssen, R.F. (author)
Satellite radar interferometry (InSAR) is an emerging technique to monitor the stability and health of line-infrastructure assets, such as railways, dams, and pipelines. However, InSAR is an opportunistic approach as the location and occurrence of its measurements (coherent scatterers) cannot be guaranteed, and the quality of the InSAR...
journal article 2018
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Agarwal, G. (author), Gao, H. (author), Amirthalingam, M. (author), Hermans, M.J.M. (author)
In situ strain evolution during laser welding has been measured by means of digital image correlation to assess the susceptibility of an advanced high strength automotive steel to solidification cracking. A novel method realised using auxiliary illumination and optical narrow bandpass filter allowed strain measurements as close as 1.5 mm from...
journal article 2018
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Rajabzadeh, Aydin (author), Heusdens, R. (author), Hendriks, R.C. (author), Groves, R.M. (author)
In the past few decades, fibre Bragg grating (FBG) sensors have gained a lot of attention in the field of distributed point strain measurement. One of the most interesting properties of these sensors is the presumed linear relationship between the strain and the peak wavelength shift of the FBG reflected spectra. However, subjecting sensors to a...
journal article 2018
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Rajabzadeh, Aydin (author), Hendriks, R.C. (author), Heusdens, R. (author), Groves, R.M. (author)
In this paper, we used the efficient formulation of the approximated transfer matrix model (ATMM) for the analysis of fibre Bragg grating (FBG) sensors' response under anti-symmetrical strain fields. Exploiting the flexible representation of the transfer matrices in this new model, we will analytically prove that any sort of anti-symmetrical...
conference paper 2018
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Anisimov, A. (author), Groves, R.M. (author)
This work presents the design and preliminary results of a high-speed shearography instrument in development for surface strain components measurements during an impact event. Composite materials are vulnerable to extreme dynamic loadings such as blade off events or foreign object damage as their mechanical properties are strain rate...
conference paper 2018
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Arechabaleta Guenechea, Z. (author), van Liempt, P. (author), Sietsma, J. (author)
Understanding the intricate structure of dislocations in metals is a major issue in materials science. In this paper we present a comprehensive approach for the characterisation of dislocation networks, resulting in accurate quantification and significantly increasing the insight into the dislocation structure. Dislocation networks in metals...
journal article 2018
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Prats-Iraola, Pau (author), Lopez Dekker, F.J. (author), De Zan, Francesco (author), Yague-Martinez, Nestor (author), Zonno, Mariantonietta (author), Rodriguez-Cassola, Marc (author)
This paper addresses the performance in the retrieval of 3-D mean deformation maps by exploiting simultaneous or quasi-simultaneous squinted synthetic aperture radar (SAR) interferometric acquisitions in a repeat-pass scenario. In multisatellite or multibeam low earth observation missions, the availability of two (or more) lines of sight ...
journal article 2018
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Anisimov, A. (author), Muller, B. (author), Sinke, J. (author), Groves, R.M. (author)
Current trends in aircraft design are to increase the economic efficiency by integrating different features in multifunctional materials. One strategy is to embed resistance heater elements between glass-fibre epoxy layers in (heated) fibre metal laminates and to use them as anti or de-icing devices in leading edges of wings. Heated glass...
journal article 2018
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Lazari, Maria (author), Sanavia, Lorenzo (author), di Prisco, Claudio (author), Pisano, F. (author)
This paper reappraises Perzyna-type viscoplasticity for the constitutive modelling of granular geomaterials, with emphasis on the simulation of rate/time effects of different magnitude. An existing elasto-plastic model for sands is first recast into a Perzyna viscoplastic formulation and then calibrated/validated against laboratory test...
journal article 2018
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Li, X. (author), Jiang, X. (author), Hopman, J.J. (author)
Flexible risers are being required to be installed in a water depth of over 3000 m for fewer remaining easy-to-access oil fields nowadays. Their innermost carcass layers are designed for external pressure resistance since the hydrostatic pressure at such a water depth may cause the collapse failure of flexible risers. Determining a critical...
journal article 2018
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Yang, Huiru (author), Wang, Zeping (author), Ye, H. (author), Zhang, Kai (author), Chen, X. (author), Zhang, Kouchi (author)
Sensitive materials for formaldehyde (HCHO) sensor need high sensitivity and selectivity. The research on two dimensional (2D) sensitive material is growing, and most studies focus on the pristine or modified graphene. So it is essential to introduce other 2D materials into HCHO gas sensor. In this report, the adsorption behaviors of organic...
journal article 2018
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Chaves Figueiredo, S. (author), Copuroglu, Oguzhan (author), Šavija, B. (author), Schlangen, E. (author)
The use of fibres to enhance the ductility of cementitious composites has been extensively studied for the past few years. The addition of polymeric or metalic fibres with random orientation to the composite or even natural long and aligned fibres demonstrated a very successful reinforcement capable to reach a high mechanical performance....
conference paper 2018
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Tinoco Rivas, M. (author), Maduro, L.A. (author), Masaki, Mukai (author), Okunishi, Eiji (author), Conesa Boj, S. (author)
Edge structures are low-dimensional defects unavoidable in layered materials of the transition metal dichalcogenides (TMD) family. Among the various types of such structures, the armchair (AC) and zigzag (ZZ) edge types are the most common. It has been predicted that the presence of intrinsic strain localized along these edges structures can...
journal article 2017
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Li, S. (author), Russell, A.R. (author), Muir Wood, D. (author)
Results of an experimental investigation are reported, conducted to study the stress-strain behavior of a soil having undergone different amounts of internal erosion. The soil used is gap-graded and cohesionless comprising silt, sand and gravel. Internal erosion tests and subsequent triaxial tests are performed in a specially designed apparatus...
conference paper 2017
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Vardon, P.J. (author), Wang, B. (author), Hicks, M.A. (author)
The simulation of slope failures, including both failure initiation and development, has been modelled using the material point method (MPM). Numerical case studies involving various slope angles, heterogeneity and rainfall infiltration are presented. It is demonstrated that, by utilising a constitutive model which encompasses, in a...
journal article 2017
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Gorter de Vries, A.R. (author), Pronk, J.T. (author), Daran, J.G. (author)
Chromosomal copy number variation (CCNV) plays a key role in evolution and health of eukaryotes. The unicellular yeast Saccharomyces cerevisiae is an important model for studying the generation, physiological impact, and evolutionary significance of CCNV. Fundamental studies of this yeast have contributed to an extensive set of methods for...
journal article 2017
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Flores, Raúl P. (author), Rijnsburger, S. (author), Horner-Devine, Alexander R. (author), Souza, Alejandro J. (author), Pietrzak, J.D. (author)
We present measurements of along and across-shore sediment transport in a region of the Dutch coast 10 km north of the Rhine River mouth. This section of the coast is characterized by strong vertical density stratification because it is within the midfield region of the Rhine region of freshwater influence, where processes typical of the far...
journal article 2017
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Rajabzadeh, Aydin (author), Groves, R.M. (author), Hendriks, R.C. (author), Heusdens, R. (author)
In this paper the behaviour of fibre Bragg grating (FBG) sensors under non-uniform strain distributions was analysed. Using the fundamental matrix approach, the length of the FBG sensor was discretised, with each segment undergoing different strain values. FBG sensors that are embedded inside composites, also undergo such non-uniform strain...
conference paper 2017
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Vardon, P.J. (author), Wang, B. (author), Hicks, M.A. (author)
The simulation of slope failures, including both failure initiation and development, has been modelled using the material point method. By utilising a constitutive model which encompasses, in a simplified manner, both pre- and post-failure behaviour, the majority of types of geotechnical slope failure can be observed in the simulations. This is...
journal article 2017
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Celada-Casero, Carola (author), Kooiker, Harm (author), Groen, Manso (author), Post, Jan (author), San Martin, David (author)
An inductive sensor developed by Philips ATC has been used to study in-situ the austenite (γ) to martensite (α′) phase transformation kinetics during tensile testing in an AISI 301 austenitic stainless steel. A correlation between the sensor output signal and the volume fraction of α′-martensite has been found by comparing the results to the...
journal article 2017
Searched for: subject%3A%22Strain%22
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