The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform

Reiner Anderl - One of the best experts on this subject based on the ideXlab platform.

  • Motion-Structural Analysis of Systems Using Digital Twins
    IFIP Advances in Information and Communication Technology, 2019
    Co-Authors: Sebastian Haag, Klaus Schützer, Reiner Anderl, Eduardo De Senzi Zancul
    Abstract:

    Digital Twins enable the analysis of systems under real world conditions using multiphysics models, sensors and bidirectional data connections between the digital and its physical twin. At the Research Lab of the Department of Computer Integrated Design (DiK) of Technische Universitat Darmstadt, a Digital Twin demonstrator was developed that enables a motion-structural simulation of a Bending Beam Test bench. The approach provides proof of many of the claimed benefits and challenges through a comprehensible Digital Twin system.

  • PLM - Motion-Structural Analysis of Systems Using Digital Twins
    IFIP Advances in Information and Communication Technology, 2019
    Co-Authors: Sebastian Haag, Klaus Schützer, Reiner Anderl, Eduardo De Senzi Zancul
    Abstract:

    Digital Twins enable the analysis of systems under real world conditions using multiphysics models, sensors and bidirectional data connections between the digital and its physical twin. At the Research Lab of the Department of Computer Integrated Design (DiK) of Technische Universitat Darmstadt, a Digital Twin demonstrator was developed that enables a motion-structural simulation of a Bending Beam Test bench. The approach provides proof of many of the claimed benefits and challenges through a comprehensible Digital Twin system.

  • digital twin proof of concept
    Manufacturing letters, 2018
    Co-Authors: Sebastian Haag, Reiner Anderl
    Abstract:

    Abstract Miniaturization and price decline enable the integration of information, communication and sensor technologies into virtually any product. Products become able to sense their own state as well as the state of their environment. Paired with the ability to process and communicate this data allows for the creation of digital twins. The digital twin is a comprehensive digital representation of an individual product that will play an integral role in a fully digitalized product life cycle. To prove the digital twin concept a cyber-physical Bending Beam Test bench was developed at DiK research lab.

  • Digital twin – Proof of concept
    Manufacturing Letters, 2018
    Co-Authors: Sebastian Haag, Reiner Anderl
    Abstract:

    Miniaturization and price decline enable the integration of information, communication and sensor technologies into virtually any product. Products become able to sense their own state as well as the state of their environment. Paired with the ability to process and communicate this data allows for the creation of digital twins. The digital twin is a comprehensive digital representation of an individual product that will play an integral role in a fully digitalized product life cycle. To prove the digital twin concept a cyber-physical Bending Beam Test bench was developed at DiK research lab.

Sebastian Haag - One of the best experts on this subject based on the ideXlab platform.

  • Motion-Structural Analysis of Systems Using Digital Twins
    IFIP Advances in Information and Communication Technology, 2019
    Co-Authors: Sebastian Haag, Klaus Schützer, Reiner Anderl, Eduardo De Senzi Zancul
    Abstract:

    Digital Twins enable the analysis of systems under real world conditions using multiphysics models, sensors and bidirectional data connections between the digital and its physical twin. At the Research Lab of the Department of Computer Integrated Design (DiK) of Technische Universitat Darmstadt, a Digital Twin demonstrator was developed that enables a motion-structural simulation of a Bending Beam Test bench. The approach provides proof of many of the claimed benefits and challenges through a comprehensible Digital Twin system.

  • PLM - Motion-Structural Analysis of Systems Using Digital Twins
    IFIP Advances in Information and Communication Technology, 2019
    Co-Authors: Sebastian Haag, Klaus Schützer, Reiner Anderl, Eduardo De Senzi Zancul
    Abstract:

    Digital Twins enable the analysis of systems under real world conditions using multiphysics models, sensors and bidirectional data connections between the digital and its physical twin. At the Research Lab of the Department of Computer Integrated Design (DiK) of Technische Universitat Darmstadt, a Digital Twin demonstrator was developed that enables a motion-structural simulation of a Bending Beam Test bench. The approach provides proof of many of the claimed benefits and challenges through a comprehensible Digital Twin system.

  • digital twin proof of concept
    Manufacturing letters, 2018
    Co-Authors: Sebastian Haag, Reiner Anderl
    Abstract:

    Abstract Miniaturization and price decline enable the integration of information, communication and sensor technologies into virtually any product. Products become able to sense their own state as well as the state of their environment. Paired with the ability to process and communicate this data allows for the creation of digital twins. The digital twin is a comprehensive digital representation of an individual product that will play an integral role in a fully digitalized product life cycle. To prove the digital twin concept a cyber-physical Bending Beam Test bench was developed at DiK research lab.

  • Digital twin – Proof of concept
    Manufacturing Letters, 2018
    Co-Authors: Sebastian Haag, Reiner Anderl
    Abstract:

    Miniaturization and price decline enable the integration of information, communication and sensor technologies into virtually any product. Products become able to sense their own state as well as the state of their environment. Paired with the ability to process and communicate this data allows for the creation of digital twins. The digital twin is a comprehensive digital representation of an individual product that will play an integral role in a fully digitalized product life cycle. To prove the digital twin concept a cyber-physical Bending Beam Test bench was developed at DiK research lab.

Xiaoming Huang - One of the best experts on this subject based on the ideXlab platform.

  • Laboratory Investigation of Incorporating Vermiculite Powder into SMA towards Low Thermal Conductivity
    DEStech Transactions on Engineering and Technology Research, 2017
    Co-Authors: Tao Tang, Xiaoming Huang, Yongli Zhao
    Abstract:

    This paper focused on the design and evaluation of an asphalt mixture with low thermal conductivity. Based on a designed SMA13 asphalt mixture, vermiculite powder was used to replace part of the fine aggregates to get an asphalt mixture with lower thermal conductivity. The Marshall Test, wheel tracking Test, low temperature Bending Beam Test, and freeze-thaw splitting Test were conducted to obtain a full evaluation of asphalt mixtures with different contents of vermiculite powder. A Mathis TCI thermal analyzer was used to Test the thermal conductivity of asphalt mixtures, and the T-monitor temperature measuring system was used to compare the inside temperature of asphalt mixtures with and without vermiculite powder. It was found that with 10% vermiculite powder in the asphalt mixture, all of the road performances were satisfied, while thermal conductivity was lowered by 40%, and the inside temperature of the asphalt mixture was lowered by up to 2℃. The findings in this paper proved the feasibility of using vermiculite powder to reduce the thermal conductivity of asphalt mixtures.

  • influences of preheating temperature of rap on properties of hot mix recycled asphalt mixture
    Journal of Testing and Evaluation, 2016
    Co-Authors: Xiaoming Huang, Yanjing Zhao, Yuqing Zhang, Hao Wang
    Abstract:

    This study analyzed the agglomerate characteristics of reclaimed asphalt pavement (RAP) material and evaluated the influences of the preheating temperature of RAP on the properties of recycled asphalt mixture. Specific surface-area analysis was conducted to reveal the agglomerate characteristics of RAP. A triaxial shear Test was conducted for RAP with different preheating conditions to evaluate the dispersion characteristics of RAP and its influences on RAP property. Freeze–thaw splitting Test, wheel tracking Test, and low-temperature Bending-Beam Test were conducted to evaluate the influences by preheating temperature of RAP on the properties of recycled asphalt mixture. It is found that, because of the agglomerates of RAP, the specific surface area of RAP is much lower than that of real aggregates. Sufficient preheating of RAP can promote the dispersion of RAP by activating the flowability of aged asphalt in RAP. The properties of recycled asphalt mixture keep improving with the increase of the preheating temperature of RAP. There is a minimum-temperature limit for RAP preheating to guarantee the properties of recycled asphalt mixture.

  • Evaluation of the diffusion and distribution of the rejuvenator for hot asphalt recycling
    Construction and Building Materials, 2015
    Co-Authors: Xiaoming Huang, Yongli Zhao, Yao Zhang
    Abstract:

    Abstract This study focused on the diffusion and distribution of the rejuvenator in the aged asphalt of reclaimed asphalt pavement (RAP) materials during hot recycling. Diffusion Tests were designed based on the penetration Test and the dynamic shearing rheometer (DSR) Test to evaluate the diffusivity of the rejuvenator in aged asphalt. The phased extraction and recovery Test and the asphalt mortar transfer Test were designed to determine the distribution of the rejuvenator during the recycling of asphalt and the distribution of the recycled asphalt within the asphalt mixture during recycling, respectively. Performance Tests, including the wheel tracking Test, low-temperature Bending Beam Test and freeze-thaw splitting Test, were conducted to evaluate the influences of the rejuvenator distribution on the performances of the asphalt mixture during recycling. The viscosity, components and rejuvenator thermal stability are found to have important influences on the diffusivity and distribution of the rejuvenator in aged asphalt. During the short blending process of recycling the asphalt mixture, it is difficult for the rejuvenator to fully diffuse into the aged asphalt. Therefore, the property and distribution of the recycled asphalt tends to be nonuniform in the asphalt mixture during recycling. This nonuniformity can lead to poor high-temperature anti-rutting performance, poor low-temperature cracking resistance and poor moisture stability of the recycled asphalt mixture.

  • Micromechanical modeling of asphalt concrete fracture using a user-defined three-dimensional discrete element method
    Journal of Central South University, 2012
    Co-Authors: Jun Chen, Lin-bing Wang, Xiaoming Huang
    Abstract:

    A user-defined micromechanical model was developed to investigate the fracture mechanism of asphalt concrete(AC)using the discrete element method(DEM).A three-dimensional(3D)AC Beam was built using the "Fish" language provided by PFC3D and was employed to simulate the three-point Bending Beam Test at two temperature levels:-10°C and 15°C.The AC Beam was modeled with the consideration of the microstructural features of asphalt mixtures.Uniaxial complex modulus Test and indirect tensile strength Test were conducted to obtain material input parameters for numerical modeling.The 3D predictions were validated using laboratory experimental measurements of AC Beams prepared by the same mixture design.Effects of mastic stiffness,cohesive and adhesive strength on AC fracture behavior were investigated using the DEM model.The results show that the 3D DEM fracture model can accurately predict the fracture patterns of asphalt concrete.The ratio of stress at interfaces to the stress in mastics increases as the mastic stiffness decreases;however,the increase in the cohesive strength or adhesive strength shows no significant influence on the tensile strength.

Samuel B. Cooper - One of the best experts on this subject based on the ideXlab platform.

  • fatigue performance of asphalt mixture containing recycled materials and warm mix technologies under accelerated loading and four point Bending Beam Test
    Journal of Cleaner Production, 2018
    Co-Authors: Minkyum Kim, Trey Jordan, Louay N. Mohammad, Samuel B. Cooper
    Abstract:

    Abstract Using high contents of reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) in pavement constructions has gained significant popularity in the recent years as a viable solution to cleaner paving material productions. The objective of this study was to evaluate fatigue cracking resistance of RAP and RAS containing asphalt paving mixtures by a bench-scale Test and a full-scale Test. A flexural Beam fatigue Test method was used for the bench-scale evaluation, while the accelerated loading facility (ALF) experimental data, obtained by the federal highway administration (FHWA) since 2013, provided the full-scale evaluation. A total of ten plant produced asphalt mixtures used for ten full-scale Test lanes were collected at the time of construction and recently prepared as Beam specimens for the four-point Bending Beam fatigue Test. Two performance grades asphalt binders (PG 64-22 and PG 58-28) were used with a conventional hot-mix and two warm-mix (foaming and chemical additive) production processes. Beam fatigue Tests were conducted by applying strain-controlled repeated sine waves until the Beam failure occurs at 50% of the initial stiffness (S i ), which were then used to evaluate the fatigue resistance of the ten mixtures. Beam fatigue and ALF Test results indicated that an increase in recycled binder ratio (RBR) results in a reduced fatigue life. Use of RAS appeared to reduce the fatigue life of ALF Test lane by 65%, but reduced the mixture fatigue life by only 2.3%. Using softer asphalt binder (PG58-28) improved the fatigue life of asphalt mixtures and pavements with 40% RAP, but did not improve as much when used with 20% RAS. Using the foaming warm mix asphalt (WMA) process improved the fatigue life of asphalt mixtures and pavements when used with 20% RAP. However, when used with 40% RAP, this benefit of the foaming WMA process may be reduced. The chemical WMA binder additive (Evotherm) generally did not improve the fatigue life of asphalt mixtures and pavements.

Ma Yuan - One of the best experts on this subject based on the ideXlab platform.

  • Laboratory investigation of the recycled asphalt concrete with stable crumb rubber asphalt binder
    Construction and Building Materials, 2019
    Co-Authors: Xunhao Ding, Luchuan Chen, Gu Linhao, Tian Chen, Ma Yuan
    Abstract:

    Abstract This paper summarizes an investigation of the performance of the recycled asphalt concrete with stable crumb rubber asphalt (SCRA) binder. Both the normal recycled asphalt mixtures and the SCRA recycled asphalt mixtures were prepared with the 0%, 30%, 50% content of the reclaimed asphalt pavement (RAP). Laboratory Tests were carried out to compare the performance of different mixtures and the comprehensive recycling effect of the SCRA and rejuvenator were evaluated further. The performance evaluations included the dynamic stability (DS) by wheel-tracking Test, failure strain by low-temperature Bending Beam Test, Marshall strength ratio (MSR) by the immersion Test and fatigue life by four-point Bending Beam Test, which represented the high-, low-temperature performance, moisture stability and the fatigue resistance respectively. The Testing results indicated that as the RAP content increased, the recycled asphalt mixtures showed a better high-temperature stability but a worse low-temperature property, moisture stability and fatigue life for both VA and SCRA recycled mixtures. The SCAR is much better than the virgin asphalt (VA) in recycling the aged asphalt mixtures with large RAP content which could reach 50%. The rejuvenator has a positive effect on the low-temperature performance, moisture stability and fatigue resistance. By the combining the use of the SCRA and rejuvenator, the low-temperature performance of the SCRA recycled asphalt mixtures could be improved further while the other performance retained a high level at the same time, which was enough for the engineering applications completely.