The Experts below are selected from a list of 762 Experts worldwide ranked by ideXlab platform
Jose L Torero - One of the best experts on this subject based on the ideXlab platform.
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critical heat flux and mass loss rate for extinction of flaming combustion of timber
Fire Safety Journal, 2017Co-Authors: Richard Emberley, Tam Do, Jose L ToreroAbstract:The critical mass loss rate and critical heat flux for self-extinction of flaming combustion during steady-state burning of timber was measured in this study for a range of timber species. A vertical mass loss calorimeter was used to provide the external heat flux and to measure the mass loss of the timber samples. The results showed that the critical mass loss rate was dependent upon the timber species but did not show a clear dependency with the timber density. Critical mass loss rates and heat fluxes for self-extinction exist for each of the timber species tested for both the solid timber and cross laminated timber (CLT). Debonding of both the char layer and the Individual Lamella of the CLT caused increased mass loss rates, re-ignition after self-extinction and increased flame lengths. Both char and ply fall-off were observed.
Richard Emberley - One of the best experts on this subject based on the ideXlab platform.
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critical heat flux and mass loss rate for extinction of flaming combustion of timber
Fire Safety Journal, 2017Co-Authors: Richard Emberley, Tam Do, Jose L ToreroAbstract:The critical mass loss rate and critical heat flux for self-extinction of flaming combustion during steady-state burning of timber was measured in this study for a range of timber species. A vertical mass loss calorimeter was used to provide the external heat flux and to measure the mass loss of the timber samples. The results showed that the critical mass loss rate was dependent upon the timber species but did not show a clear dependency with the timber density. Critical mass loss rates and heat fluxes for self-extinction exist for each of the timber species tested for both the solid timber and cross laminated timber (CLT). Debonding of both the char layer and the Individual Lamella of the CLT caused increased mass loss rates, re-ignition after self-extinction and increased flame lengths. Both char and ply fall-off were observed.
Peter M. Pinsky - One of the best experts on this subject based on the ideXlab platform.
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The role of 3-D collagen organization in stromal elasticity: a model based on X-ray diffraction data and second harmonic-generated images
Biomechanics and Modeling in Mechanobiology, 2013Co-Authors: Steven J. Petsche, Peter M. PinskyAbstract:Examining the cross-section of the human cornea with second harmonic-generated (SHG) imaging shows that many Lamellae do not lie parallel to the cornea’s anterior surface but have inclined trajectories that take them through the corneal thickness with a depth-dependent distribution. A continuum mechanics-based model of stromal elasticity is developed based on orientation information extracted and synthesized from both X-ray scattering studies and SHG imaging. The model describes the effects of inclined Lamella orientation by introducing a probability function that varies with depth through the stroma, which characterizes the range and distribution of Lamellae at inclined angles. When combined with the preferred Lamellar orientations found from X-ray scattering experiments, a fully 3-D representation of Lamella orientation is achieved. Stromal elasticity is calculated by a weighted average of Individual Lamella properties based on the spatially varying 3-D orientation distribution. The model is calibrated with in vitro torsional shear experiments and in vivo indentation data and then validated with an in vitro inflation study. A quantitative explanation of the experimentally measured depth dependence of mechanical properties emerges from the model. The significance of the 3-D Lamella orientation in the mechanics of the human cornea is demonstrated by investigating and contrasting the effects of previous modeling assumptions made on Lamella orientation.
Radecki-pawlik Bartosz - One of the best experts on this subject based on the ideXlab platform.
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Numerical simulations of the load bearing behavior of cross-laminated timber
2009Co-Authors: Radecki-pawlik BartoszAbstract:Zsfassung in poln. SpracheIn the framework of presented thesis the two-step MCLT (Model for Cross Laminated Timber) is described. The main motivation for this thesis was to develop a simulation tool for investigation of the mechanical behaviour of cross-laminated timber and to apply it to studying the influence of varying mechanical characteristics of the Individual Lamellae on the overall plate behaviour. As the base for the MCLT one of the already existing two dimensional models - the KAREM model - is chosen. The first programme (simulation programme) generates the stiffness and strength values of each Individual Lamella of the plate, considering the material parameters, such as lengths of boards, density, knots and moisture content and their variations.A plate with homogeneous mechanical properties is defined as reference plate. The second programme - finite element programme - computes the distributions of deflections, stresses and strains in the framework of elastic and elastic-plastic calculations. The results of computations performed for the reference plate, using the MCLT in the elastic range are compared with analytical results and show a good agreement. The MCLT can be used for estimating the stiffness and the elastic limit load of the plate. The elastic limit is determined for the reference plate and for one hundred plates with randomly distributed material properties. A considerable variation of this limit is observed. Considering the results of computations using MCLT, it is observed that the plasticisation and the lamination of layers affects the distribution of displacements, stresses and strains.Also the variability of material parameters in the random plates influences the stiffness and elastic limit of the cross-laminated timber.6
Tam Do - One of the best experts on this subject based on the ideXlab platform.
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critical heat flux and mass loss rate for extinction of flaming combustion of timber
Fire Safety Journal, 2017Co-Authors: Richard Emberley, Tam Do, Jose L ToreroAbstract:The critical mass loss rate and critical heat flux for self-extinction of flaming combustion during steady-state burning of timber was measured in this study for a range of timber species. A vertical mass loss calorimeter was used to provide the external heat flux and to measure the mass loss of the timber samples. The results showed that the critical mass loss rate was dependent upon the timber species but did not show a clear dependency with the timber density. Critical mass loss rates and heat fluxes for self-extinction exist for each of the timber species tested for both the solid timber and cross laminated timber (CLT). Debonding of both the char layer and the Individual Lamella of the CLT caused increased mass loss rates, re-ignition after self-extinction and increased flame lengths. Both char and ply fall-off were observed.