The Experts below are selected from a list of 41298 Experts worldwide ranked by ideXlab platform
Patrick Terriault - One of the best experts on this subject based on the ideXlab platform.
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impact induced Damage and Damage Propagation under flexural load in tini and kevlar stitched carbon epoxy laminates
Composite Structures, 2013Co-Authors: Pierre-luc Vachon, Vladimir Brailovski, Patrick TerriaultAbstract:Abstract This paper presents a study of the effect of stitched reinforcements on impact-induced Damage and Damage Propagation under flexural load. TiNi and Kevlar threads were used as the superelastic element and the reference thread, respectively. Unstitched carbon/epoxy laminates were also produced. Embedded Damage (matrix cracks, fiber rupture and delamination) was induced by low velocity impact testing. The performance of the unstitched and stitched specimens was assessed in terms of the energy per unit volume of Damage created during impact testing, and the energy to failure of the impacted specimens during their three-point bending testing. A finite element model was used for simulating the Propagation of Damage, and particularly delamination, in stitched and unstitched structures during the bending test, and, depending on the mechanical properties of the stitching threads, different Propagation schemes were predicted with this model.
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Impact-induced Damage and Damage Propagation under flexural load in TiNi and Kevlar-stitched carbon/epoxy laminates
Composite Structures, 2013Co-Authors: Pierre-luc Vachon, Vladimir Brailovski, Patrick TerriaultAbstract:Abstract This paper presents a study of the effect of stitched reinforcements on impact-induced Damage and Damage Propagation under flexural load. TiNi and Kevlar threads were used as the superelastic element and the reference thread, respectively. Unstitched carbon/epoxy laminates were also produced. Embedded Damage (matrix cracks, fiber rupture and delamination) was induced by low velocity impact testing. The performance of the unstitched and stitched specimens was assessed in terms of the energy per unit volume of Damage created during impact testing, and the energy to failure of the impacted specimens during their three-point bending testing. A finite element model was used for simulating the Propagation of Damage, and particularly delamination, in stitched and unstitched structures during the bending test, and, depending on the mechanical properties of the stitching threads, different Propagation schemes were predicted with this model.
Pierre-luc Vachon - One of the best experts on this subject based on the ideXlab platform.
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impact induced Damage and Damage Propagation under flexural load in tini and kevlar stitched carbon epoxy laminates
Composite Structures, 2013Co-Authors: Pierre-luc Vachon, Vladimir Brailovski, Patrick TerriaultAbstract:Abstract This paper presents a study of the effect of stitched reinforcements on impact-induced Damage and Damage Propagation under flexural load. TiNi and Kevlar threads were used as the superelastic element and the reference thread, respectively. Unstitched carbon/epoxy laminates were also produced. Embedded Damage (matrix cracks, fiber rupture and delamination) was induced by low velocity impact testing. The performance of the unstitched and stitched specimens was assessed in terms of the energy per unit volume of Damage created during impact testing, and the energy to failure of the impacted specimens during their three-point bending testing. A finite element model was used for simulating the Propagation of Damage, and particularly delamination, in stitched and unstitched structures during the bending test, and, depending on the mechanical properties of the stitching threads, different Propagation schemes were predicted with this model.
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Impact-induced Damage and Damage Propagation under flexural load in TiNi and Kevlar-stitched carbon/epoxy laminates
Composite Structures, 2013Co-Authors: Pierre-luc Vachon, Vladimir Brailovski, Patrick TerriaultAbstract:Abstract This paper presents a study of the effect of stitched reinforcements on impact-induced Damage and Damage Propagation under flexural load. TiNi and Kevlar threads were used as the superelastic element and the reference thread, respectively. Unstitched carbon/epoxy laminates were also produced. Embedded Damage (matrix cracks, fiber rupture and delamination) was induced by low velocity impact testing. The performance of the unstitched and stitched specimens was assessed in terms of the energy per unit volume of Damage created during impact testing, and the energy to failure of the impacted specimens during their three-point bending testing. A finite element model was used for simulating the Propagation of Damage, and particularly delamination, in stitched and unstitched structures during the bending test, and, depending on the mechanical properties of the stitching threads, different Propagation schemes were predicted with this model.
Vladimir Brailovski - One of the best experts on this subject based on the ideXlab platform.
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impact induced Damage and Damage Propagation under flexural load in tini and kevlar stitched carbon epoxy laminates
Composite Structures, 2013Co-Authors: Pierre-luc Vachon, Vladimir Brailovski, Patrick TerriaultAbstract:Abstract This paper presents a study of the effect of stitched reinforcements on impact-induced Damage and Damage Propagation under flexural load. TiNi and Kevlar threads were used as the superelastic element and the reference thread, respectively. Unstitched carbon/epoxy laminates were also produced. Embedded Damage (matrix cracks, fiber rupture and delamination) was induced by low velocity impact testing. The performance of the unstitched and stitched specimens was assessed in terms of the energy per unit volume of Damage created during impact testing, and the energy to failure of the impacted specimens during their three-point bending testing. A finite element model was used for simulating the Propagation of Damage, and particularly delamination, in stitched and unstitched structures during the bending test, and, depending on the mechanical properties of the stitching threads, different Propagation schemes were predicted with this model.
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Impact-induced Damage and Damage Propagation under flexural load in TiNi and Kevlar-stitched carbon/epoxy laminates
Composite Structures, 2013Co-Authors: Pierre-luc Vachon, Vladimir Brailovski, Patrick TerriaultAbstract:Abstract This paper presents a study of the effect of stitched reinforcements on impact-induced Damage and Damage Propagation under flexural load. TiNi and Kevlar threads were used as the superelastic element and the reference thread, respectively. Unstitched carbon/epoxy laminates were also produced. Embedded Damage (matrix cracks, fiber rupture and delamination) was induced by low velocity impact testing. The performance of the unstitched and stitched specimens was assessed in terms of the energy per unit volume of Damage created during impact testing, and the energy to failure of the impacted specimens during their three-point bending testing. A finite element model was used for simulating the Propagation of Damage, and particularly delamination, in stitched and unstitched structures during the bending test, and, depending on the mechanical properties of the stitching threads, different Propagation schemes were predicted with this model.
Ren Jian - One of the best experts on this subject based on the ideXlab platform.
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CT real-time testing on meso-mechanism of creep Damage Propagation in rock under uniaxial compression
Journal of Hydraulic Engineering, 2002Co-Authors: Ren JianAbstract:The meso\|mechanism of creep Damage Propagation in rock under uniaxial compression is experimentally studied using the computerized tomograhpy(CT) real\|time testing facility developed by the authors. Clear images of the failure process, including micro\|cracks initiation, crack development and bifurcation and fracture are attained. Based on the change of the CT value and CT image obtained from scanning test, the Propagation law of the meso\|Damage in rock is deduced. The change law of crack width and length related to creeping time has been quantitatively analyzed.
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CT Real－time testing on Damage Propagation microscopic mechanism of rock under uniaxial compression
Rock and Soil Mechanics, 2001Co-Authors: Ren JianAbstract:The computerized tomographyCT real－time testing of rock microscopic Damage Propagation using the newest special purpose loading epuipment for the CT machine under uniaxial compression loading was accomplished． Through CT scanning clear CT images were obtained． The images include the whole process of rock failure from the micro－hole compaction growth bifurcation development fracture rock failure to unloading stage under the different stress states． Based on the microscopic mechanism of Damage Propagation of rock the stress－strain complete process curve is divided into 5 sections which provides an important base for establishment of the Damage constitutive model of rock． Using this equipment to study the characteristics of rock microscopic Damage mechanics is feasible．
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Rock meso-Damage Propagation law in the triaxial compression loading and its constitutive model
Journal of China Coal Society, 2001Co-Authors: Ren JianAbstract:Using the specified loading equipment corresponding to the CT machine developed by the authors,the computerized tomography (CT) real in time testing of rock meso Damage Propagation law under the triaxial compression have been completed. The stress threshold value of Damage is determined.The quantitative analysis of testing results has been completed. And based on the aim of the application of engineering,the pre peak rock 3 parts Damage evolution equation and constitutive model are given. The theory results is identical to the testing results.
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CT Real-time Analysis of Meso-Damage Propagation Law of the Whole Process of Rock Failure
Journal of Xi'an Highway University, 2000Co-Authors: Ren JianAbstract:Using the newest specified loading equipment corresponding to the CT machine under the triaxial(uniaxial) compression,the real time computerized tomography testing of meso Damage Propagation law of the whole rock failure process was completed. Through CT scanning,the clear CT images which includes the stage from the microhole(microcrack) compressed to the microcrack growth, the microcrack bifurcation, the microcrack development, the crack fracture, the rock sample failure, and to the unloading stage were obtained. The CT values, CT images and the other data were analysed. The stress threshold value of the sandstone Damage was derived. The initial rock meso Damage Propagation law is given.
Farhan Khan - One of the best experts on this subject based on the ideXlab platform.
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Online Subspace Tracking of Sensors Data for Damage Propagation Modeling and Predictive Analytics
2019Co-Authors: Farhan KhanAbstract:We analyze Damage Propagation modeling of turbo-engines in a data-driven approach. We investigate subspace tracking assuming a low dimensional manifold structure and a static behavior during the healthy state of the machines. Our Damage Propagation model is based on the deviation of the data from the static behavior and uses the notion of health index as a measure of the condition. Hence, we incorporate condition-based maintenance and estimate the remaining useful life based on the current and previous health indexes. This paper proposes an algorithm that adapts well to the dynamics of the data and underlying system, and reduces the computational complexity by utilizing the low dimensional manifold structure of the data. A significant performance improvement is demonstrated over existing methods by using the proposed algorithm on CMAPSS Turbo-engine datasets.
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Online Subspace Tracking for Damage Propagation Modeling and Predictive Analytics: Big Data Perspective.
arXiv: Signal Processing, 2019Co-Authors: Farhan KhanAbstract:We analyze Damage Propagation modeling of turbo-engines in a data-driven approach. We investigate subspace tracking assuming a low dimensional manifold structure and a static behavior during the healthy state of the machines. Our Damage Propagation model is based on the deviation of the data from the static behavior and uses the notion of health index as a measure of the condition. Hence, we incorporate condition-based maintenance and estimate the remaining useful life based on the current and previous health indexes. This paper proposes an algorithm that adapts well to the dynamics of the data and underlying system, and reduces the computational complexity by utilizing the low dimensional manifold structure of the data. A significant performance improvement is demonstrated over existing methods by using the proposed algorithm on CMAPSS Turbo-engine datasets.
