Application of direct/inverse analysis to evaluate the structure integrity of concrete. Part I. Formulation for thermo-mechanical properties determination

Wawrzynek, A.; Nowak, Andrzej J.; Bartoszek, M.; Delpak, R.; Shih, J.K.C.; Hu, Chang-Fu

doi:10.1016/s0963-8695(02)00092-0

Cited by 4 publications

(7 citation statements)

References 4 publications

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“…Results of the evaluation of these design variables, through the transient inverse analysis, are shown in figure 11, where they are also compared with the 'exact' values (cubic functions describing both k 1 ðTÞ and C 1 ðTÞ). Convergence of the iterative process is shown in figure (12). Similarly to steady-state analysis (cf.…”

Section: Results Of Inverse Analysis and Observationsmentioning

confidence: 88%

“…This part of the project is undertaken by Delpak's research team (at University of Glamorgan, Wales, UK) which records and processes the thermographic images. The image grabbing software used in this case was C-therm which has been specifically developed to be sensitive to various surface emissivities (see [12] for C-therm source).…”

Section: Temperature Measurementsmentioning

confidence: 99%

“…Further conclusions regarding the design of the proposed experiment can be drawn from analysis of the transient process as described by equations (1)-(2) and (5)- (12). In this case temperature fields are additionally controlled by initial temperatures T 01 and T 02 as well as by two quantities, i.e.…”

Section: Transient Measurementsmentioning

confidence: 99%

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Theoretical analysis of applying thermography and inverse solutions to determine thermal properties of cementitious materials

Wawrzynek

Nowak

Bartoszek

et al. 2005

Inverse Problems in Science and Engineering

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This work discusses results of the theoretical analysis performed in order to study technical feasibility of an experiment and measurement set-up for determining thermal properties of cementitious materials. The cylindrical test-piece under the study is modelled to compose two subdomains. The medium in the first subdomain, the properties of which are required, is heated by the surface heat source at its free extremity while being in contact with the second medium with predetermined properties, known as reference material. There is a special provision in the analysis that all the required measurements could be simulated by adding random errors to numerical results from the direct solutions.All algorithms to determine the key parameters are based on the sensitivity analysis. The analysis is designed to process a large number of surface temperature measurements normally collected using a thermographic camera. These are processed through the inverse analysis in order to determine the thermal properties of the measured (cementitious) material as well as auxiliary thermal quantities/parameters occurring within the considered set-up.Outcomes of extensive computations show dependence of the values of identified thermal properties on the accuracy of the temperature measurements as well as on some auxiliary thermal quantities.

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Section: Results Of Inverse Analysis and Observationsmentioning

confidence: 88%

Section: Temperature Measurementsmentioning

confidence: 99%

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Theoretical analysis of applying thermography and inverse solutions to determine thermal properties of cementitious materials

Wawrzynek

Nowak

Bartoszek

et al. 2005

Inverse Problems in Science and Engineering

Self Cite

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show abstract

“…Majority of parameters from the 1 o and 2 o groups are difficult to process for acceptable levels of estimation or actual measurements. Therefore they are treated as design (unknown) parameters searched from the solution of suitable inverse thermal problem [2]. To propose proper conditions of experiment three kinds of sensitivity coefficients are used ([3], [4]): 1 o ordinary, 2 o dimensionless, 3 o relative ones.…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…It is a function of least square errors between measured and numerical temperatures in measurement points (from 1 to N p ) and time steps (from 1 step to N t ) -see [2]. Vector Y denotes vector consists from all design parameters:…”

Section: Solution Algorithmmentioning

confidence: 99%

Dedicated analytical formulation for an experimental set‐up to determine thermomechanical properties ‐ sensitivity and inverse analyses

Wawrzynek

Bartoszek

Delpak

et al. 2003

Proc Appl Math and Mech

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Heat Transfer Visualization of the Application of a Cooling Pipe in Sand with Flowing Pore Water

2017

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Application of direct/inverse analysis to evaluate the structure integrity of concrete. Part I. Formulation for thermo-mechanical properties determination

Cited by 4 publications

References 4 publications

Theoretical analysis of applying thermography and inverse solutions to determine thermal properties of cementitious materials

Theoretical analysis of applying thermography and inverse solutions to determine thermal properties of cementitious materials

Dedicated analytical formulation for an experimental set‐up to determine thermomechanical properties ‐ sensitivity and inverse analyses

Heat Transfer Visualization of the Application of a Cooling Pipe in Sand with Flowing Pore Water

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