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View article: Acoustic Emission Characteristics in Coal Failure from Chinese Coal
Acoustic Emission Characteristics in Coal Failure from Chinese Coal Open
View article: Enhancement of the Elastocaloric Performance of Natural Rubber by Forced Air Convection
Enhancement of the Elastocaloric Performance of Natural Rubber by Forced Air Convection Open
We study the enhancement of the elastocaloric effect in natural rubber by using forced air convection to favour heat extraction during the elongation stage of a stretching–unstretching cycle. Elastocaloric performance is quantified by mean…
View article: Enhancement of the Elastocaloric Performance of Natural Rubber by Forced Air Convection
Enhancement of the Elastocaloric Performance of Natural Rubber by Forced Air Convection Open
We study the enhancement of the elastocaloric effect in natural rubber by using forced air convection in order to favour heat extraction during the elongation stage of an stretching-unstretching cycle. Elastocaloric performance is quantifi…
View article: Heat exchange and damage of carbon black‐filled styrene‐butadiene rubber under uniaxial cyclic loading
Heat exchange and damage of carbon black‐filled styrene‐butadiene rubber under uniaxial cyclic loading Open
In this paper, we present an original experimental approach combining infrared thermography, analysis of voiding, and swelling tests to investigate damage mechanisms in carbon black (CB)‐filled styrene‐butadiene rubber (SBR). Heat exchange…
View article: Demagnetizing field-induced magnetocaloric effect in Gd
Demagnetizing field-induced magnetocaloric effect in Gd Open
We have studied the impact of demagnetizing fields on the magnetocaloric effect of commercial-grade gadolinium plates. Adiabatic temperature changes (ΔT) were measured for magnetic fields applied along the parallel and perpendicular direct…
View article: Elastocaloric Waste/Natural Rubber Materials with Various Crosslink Densities
Elastocaloric Waste/Natural Rubber Materials with Various Crosslink Densities Open
The characterization of the mechanical behavior of elastocaloric materials is essential to identify their viability in heating/cooling devices. Natural rubber (NR) is a promising elastocaloric (eC) polymer as it requires low external stres…
View article: Flexocaloric effect in superelastic materials
Flexocaloric effect in superelastic materials Open
We present a combined theoretical–experimental study of flexocaloric effects in superelastic materials exhibiting structural transitions. We study a Ginzburg–Landau model combined with a vibrational model for a beam near a ferroelastic tra…
View article: Observation of heterogeneities in elastocaloric natural/wastes rubber composites
Observation of heterogeneities in elastocaloric natural/wastes rubber composites Open
The strain-induced crystallization and elastocaloric properties of various natural rubber (NR)/ground tire rubber (GTR) blends, comprising waste particles of diverse sizes and contents, were investigated. The decreasing inter-distance betw…
View article: Elastocaloric effect in vulcanized natural rubber and natural/wastes rubber blends
Elastocaloric effect in vulcanized natural rubber and natural/wastes rubber blends Open
View article: Heat sink avalanche dynamics in elastocaloric Cu–Al–Ni single crystal detected by infrared calorimetry and Gaussian filtering
Heat sink avalanche dynamics in elastocaloric Cu–Al–Ni single crystal detected by infrared calorimetry and Gaussian filtering Open
The physics behind the cooling process occurring in an elastocaloric Cu–Al–Ni wire during the martensite to austenite transition after stress release is studied. A previous experiment using infrared imaging determined the temperature map e…
View article: Thermo-magnetic characterization of phase transitions in a Ni-Mn-In metamagnetic shape memory alloy
Thermo-magnetic characterization of phase transitions in a Ni-Mn-In metamagnetic shape memory alloy Open
The partially overlapped ferroelastic/martensitic and para-ferromagnetic phase transitions of a Ni50.53Mn33.65In15.82 metamagnetic shape memory alloy have been studied from calorimetric, magnetic and acoustic emission measurement. We have …
View article: Suppression of acoustic emission during superelastic tensile cycling of polycrystalline <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ni</mml:mi><mml:mrow><mml:mn>50.4</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Ti</mml:mi><mml:mrow><mml:mn>49.6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Suppression of acoustic emission during superelastic tensile cycling of polycrystalline Open
We investigate acoustic emission (AE) that arises during the martensitic\ntransition in a polycrystalline specimen of the prototypical\nsuperelastic/elastocaloric alloy Ni$_{50.4}$Ti$_{49.6}$ (at. %) driven using\ntensile strain. We use tw…
View article: Tracking the dynamics of power sources and sinks during the martensitic transformation of a Cu–Al–Ni single crystal
Tracking the dynamics of power sources and sinks during the martensitic transformation of a Cu–Al–Ni single crystal Open
We have tracked the dynamics of the martensitic transformation in a Cu–Al–Ni single crystal by means of acoustic emission and infrared imaging techniques. A Fourier equation-based post-processing of temperature maps has enabled us to revea…
View article: Concurrent tracking of strain and noise bursts at ferroelastic phase fronts
Concurrent tracking of strain and noise bursts at ferroelastic phase fronts Open
View article: Universality of power-law exponents by means of maximum-likelihood estimation
Universality of power-law exponents by means of maximum-likelihood estimation Open
Power-law-type distributions are extensively found when studying the behavior of many complex systems. However, due to limitations in data acquisition, empirical datasets often only cover a narrow range of observation, making it difficult …
View article: Change of crackling noise in granite by thermal damage: Monitoring nuclear waste deposits
Change of crackling noise in granite by thermal damage: Monitoring nuclear waste deposits Open
High-sensitivity detection of acoustic emission from granite under uniaxial stress, together with advanced statistical analysis, shows changing collapse mechanisms when a sample is pre-heated. Massive microstructural changes occur at tempe…
View article: Scale-invariant avalanche dynamics in the temperature-driven martensitic transition of a Cu-Al-Be single crystal
Scale-invariant avalanche dynamics in the temperature-driven martensitic transition of a Cu-Al-Be single crystal Open
We have combined high sensitivity, extra-low differential temperature scanning rate calorimetry, and acoustic emission (AE) measurements to study avalanches during the cubic ↔ 18R martensitic transition of a Cu-Al-Be single crystalline sha…
View article: Criticality in failure under compression: Acoustic emission study of coal and charcoal with different microstructures
Criticality in failure under compression: Acoustic emission study of coal and charcoal with different microstructures Open
A systematic study of acoustic emission avalanches in coal and charcoal samples under slow uniaxial compression is presented. The samples exhibit a range of organic composition in terms of chemical elements as well as different degrees of …
View article: Experimental Evidence of Accelerated Seismic Release without Critical Failure in Acoustic Emissions of Compressed Nanoporous Materials
Experimental Evidence of Accelerated Seismic Release without Critical Failure in Acoustic Emissions of Compressed Nanoporous Materials Open
The total energy of acoustic emission (AE) events in externally stressed materials diverges when approaching macroscopic failure. Numerical and conceptual models explain this accelerated seismic release (ASR) as the approach to a critical …
View article: Increasing power-law range in avalanche amplitude and energy distributions
Increasing power-law range in avalanche amplitude and energy distributions Open
Power-law-type probability density functions spanning several orders of magnitude are found for different avalanche properties. We propose a methodology to overcome empirical constraints that limit the range of truncated power-law distribu…
View article: Crossover from three-dimensional to two-dimensional systems in the nonequilibrium zero-temperature random-field Ising model
Crossover from three-dimensional to two-dimensional systems in the nonequilibrium zero-temperature random-field Ising model Open
We present extensive numerical studies of the crossover from three-dimensional to two-dimensional systems in the nonequilibrium zero-temperature random-field Ising model with metastable dynamics. Bivariate finite-size scaling hypotheses ar…
View article: DESTINO Y COSTUMBRE EN HERÓDOTO: LA DESGRACIA DE CANDAULES
DESTINO Y COSTUMBRE EN HERÓDOTO: LA DESGRACIA DE CANDAULES Open
El presente trabajo quiere poner en\n\t\t\t\t relieve la importancia de la historia Candaules y\n\t\t\t\t Giges en la obra de Heródoto. Para ello, establecemos nuestro foco en conceptos como el destino\n\t\t\t\t o la costumbre (νόμος), y c…
View article: Understanding the Thermodynamic Properties of the Elastocaloric Effect Through Experimentation and Modelling
Understanding the Thermodynamic Properties of the Elastocaloric Effect Through Experimentation and Modelling Open
View article: Avalanches and force drops in displacement-driven compression of porous glasses
Avalanches and force drops in displacement-driven compression of porous glasses Open
Similarities between force-driven compression experiments of porous materials and earthquakes have been recently proposed. In this paper, we measure the acoustic emission during displacement-driven compression of a porous glass. The energy…
View article: Avalanche criticalities and elastic and calorimetric anomalies of the transition from cubic Cu-Al-Ni to a mixture of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>18</mml:mn><mml:mi>R</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mi>H</mml:mi></mml:mrow></mml:math>structures
Avalanche criticalities and elastic and calorimetric anomalies of the transition from cubic Cu-Al-Ni to a mixture ofandstructures Open
We studied the two-step martensitic transition of a Cu-Al-Ni shape-memory alloy by calorimetry, acoustic emission (AE), and resonant ultrasound spectroscopy (RUS) measurements. The transition occurs under cooling from the cubic (β, Fm3m) p…
View article: Influence of the aspect ratio and boundary conditions on universal finite-size scaling functions in the athermal metastable two-dimensional random field Ising model
Influence of the aspect ratio and boundary conditions on universal finite-size scaling functions in the athermal metastable two-dimensional random field Ising model Open
This work studies universal finite size scaling functions for the number of one-dimensional spanning avalanches in a two-dimensional (2D) disordered system with boundary conditions of different nature and different aspect ratios. To this e…
View article: Model risk on credit risk
Model risk on credit risk Open
This paper develops the Jungle model in a credit portfolio framework. The Jungle model is able to model credit contagion, produce doubly-peaked probability distributions for the total default loss and endogenously generate quasi phase tran…
View article: Criticality in the slowed-down boiling crisis at zero gravity
Criticality in the slowed-down boiling crisis at zero gravity Open
Boiling crisis is a transition between nucleate and film boiling. It occurs at a threshold value of the heat flux from the heater called CHF (critical heat flux). Usually, boiling crisis studies are hindered by the high CHF and short trans…
View article: Model risk on credit risk
Model risk on credit risk Open
This paper develops the Jungle model in a credit portfolio framework. The Jungle model is able to model credit contagion, produce doubly-peaked probability distributions for the total default loss and endogenously generate quasi phase tran…
View article: Caloric and Multicaloric Effects in Shape Memory Alloys
Caloric and Multicaloric Effects in Shape Memory Alloys Open
Caloric properties rely on the reversible thermal response of a given material to changes induced by an applied field. In magnetic shape-memory materials, thanks to a strong interplay between magnetism and structure, caloric effects can be…