Determination of Thermal-Diffusivity Dependence on Temperature of Transparent Samples by Thermal Wave Method

Kaźmierczak-Bałata, Anna; Bodzenta, Jerzy; Trefon-Radziejewska, Dominika

doi:10.1007/s10765-009-0676-1

Cited by 18 publications

(8 citation statements)

References 12 publications

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“…Taking into consideration all processes, starting from manufacturing [16][17][18][19][20], regular exploitation [21][22][23][24] and repairs [25][26][27][28][29][30][31][32].…”

Section: Discussionmentioning

confidence: 99%

Influence of Production Process and Material Factors on Fatigue Strength of Tubular Stabilizer Bar / Wpływ Procesu Produkcyjnego I Czynników Materiałowych Na Wytrzymałość Zmęczeniową Stabilizatora Rurowego

Wittek

Burdzik

Folęga

et al. 2015

Archives of Metallurgy and Materials

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The paper presented results of the research on process of production of highly important element of passenger car. The main object of the research was influence of production process and material factors on fatigue strength of tubular stabilizer bar. The scope of the research included the stabilizer bar hot bent at the bending table, hardened in oil and tempered. The bending radii I, II and III were metalographically tested. The stabilizer bar was also subjected to fatigue tests. For analysis purpose the finite element method (FEM) calculation have been conducted. The analysis of relationship of outer diameter to wall thickness is very important. The analysed bar has broken early. The paper presents the reasons for premature failure of the tubular stabilizer bar.

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“…Taking into consideration all processes, starting from manufacturing [16][17][18][19][20], regular exploitation [21][22][23][24] and repairs [25][26][27][28][29][30][31][32].…”

Section: Discussionmentioning

confidence: 99%

Influence of Production Process and Material Factors on Fatigue Strength of Tubular Stabilizer Bar / Wpływ Procesu Produkcyjnego I Czynników Materiałowych Na Wytrzymałość Zmęczeniową Stabilizatora Rurowego

Wittek

Burdzik

Folęga

et al. 2015

Archives of Metallurgy and Materials

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“…The OBT method is similar to other thermal wave techniques such as the Ångström method published as long ago as 1861 [4], but are still under development today [5][6][7][8][9]. An oscillating boundary temperature is imposed on a sample and internal temperatures are monitored to calculate the thermal properties.…”

Section: Oscillating Boundary Temperature (Obt) Methodsmentioning

confidence: 99%

An Oscillating Boundary Temperature Method for the Determination of Transient Thermal Conductivity and Internal Heat Generation with a Comparison to a Transient Hot-Wire Method

Chirdon

Patil

2011

Int J Thermophys

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An oscillating boundary temperature (OBT) method is proposed to simultaneously determine transient thermal properties including thermal conductivity, thermal diffusivity, internal heat generation, and volumetric heat capacity for exothermic solids and semi-solids over a narrow, controlled temperature range by using internal temperature measurements of the thermal wave. A comparison of this method and a transient hot-wire (THW) method is conducted in the presence of heat generation using physical properties which change over time. The advantages and disadvantages of both methods are discussed. The OBT method is potentially useful for the analysis of exothermic solid or semi-solid materials such as hydrating (freshly mixed) cement and concrete, polymers and composites undergoing polymerization reactions, and biological tissues.

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“…In case of the photothermal method for temperature wave generation, the sample is heated periodically by light radiation with modulating light flux intensity, wherein the radiation is partially absorbed by the environment [4]. The need for several radiation photo detectors to record temperature and temperature wave phases (due to inconsistency of their sensitivity in different spectral ranges) during thermophysical measurements in a wide temperature range is the disadvantage of this method.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Thermal Diffusivity of Multi-Layered Graphene Nanoplatelets (GNPs) by a Periodic Heating Method

Lyubimova¹,

Пономарев²,

Divin³

2016

AM&T

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The present paper describes ways of increasing the accuracy of measurements of thermophysical properties (namely, thermal diffusivity) of materials. The knowledge of these characteristics is very important for modeling industrial processes, since their high-accuracy determination can reduce wasteful consumption of energy resources while developing novel thermal insulation materials, technologies, as well as methods for building construction.The method proposed herein is based on periodic heating and can be used to improve the measurement accuracy and find the optimal parameters for producing thermal insulation materials. Periodic temperature oscillations were generated by means of the Peltier element. Mathematical and physical models were developed, and the measurement setup was automated using the LabView graphical programming environment. The analysis of possible error sources was performed, and the ways of decreasing error values were suggested.The equipment was experimentally calibrated using a standard material (Plexiglas), and the obtained data proved the appropriateness of the developed mathematical model. Moreover, a number of tests were performed with a nanomaterial, namely, graphene nanoplatelets (GNPs). The proposed method and the experimental measurement setup made it possible to reveal a strong dependence between the thermal diffusivity of the GNPs and the moisture content. This finding will be considered in further studies concerning the above-mentioned nanomaterial. KeywordsPeriodic heating; thermal insulation materials; graphene nanoplatelets (GNPs); thermal diffusivity; measurement error. oscillations; ADC Δ -random error introduced by the data acquisition board; U inp -input voltage range for the analog-todigital converter, mV; n -resolution of the analog-to-digital converter; emf Δ -disturbance caused by external magnetic fields.

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Determination of Thermal-Diffusivity Dependence on Temperature of Transparent Samples by Thermal Wave Method

Cited by 18 publications

References 12 publications

Influence of Production Process and Material Factors on Fatigue Strength of Tubular Stabilizer Bar / Wpływ Procesu Produkcyjnego I Czynników Materiałowych Na Wytrzymałość Zmęczeniową Stabilizatora Rurowego

Influence of Production Process and Material Factors on Fatigue Strength of Tubular Stabilizer Bar / Wpływ Procesu Produkcyjnego I Czynników Materiałowych Na Wytrzymałość Zmęczeniową Stabilizatora Rurowego

An Oscillating Boundary Temperature Method for the Determination of Transient Thermal Conductivity and Internal Heat Generation with a Comparison to a Transient Hot-Wire Method

Measuring the Thermal Diffusivity of Multi-Layered Graphene Nanoplatelets (GNPs) by a Periodic Heating Method

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