Bond Failure - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Bond Failure

The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform

Muhammad Ashraful Alam – 1st expert on this subject based on the ideXlab platform

  • Electrical Signatures of Corrosion and Solder Bond Failure in c-Si Solar Cells and Modules
    IEEE Journal of Photovoltaics, 2019
    Co-Authors: Reza Asadpour, Muhammad Ashraful Alam

    Abstract:

    Moisture- and temperature-activated corrosion of metal fingers, mechanical stress induced delamination, and Failure of solder Bonds rank among the leading Failure mechanisms of solar modules. The physics of moisture ingress, diffusion, and reaction have been explored in detail, but the electrical implications of corrosion and delamination on specific front-surface grid geometry is not fully understood. In this paper, we show that the module efficiency loss due to corrosion, delamination and solder Bond Failure (CDS) involves a complex interplay of voltage/current redistribution, reflected as a loss in photocurrent, as well as decrease/increase in shunt/series resistances. The analysis presented in this paper will redefine the interpretation of experimental I-V characteristic features due to degradation mechanisms, integrate a variety of scattered and counter-intuitive experimental results within a common theoretical framework, and inform CDS-resistant grid design for solar modules.

  • electrical signatures of corrosion and solder Bond Failure in c si solar cells and modules
    arXiv: Applied Physics, 2018
    Co-Authors: Reza Asadpour, Muhammad Ashraful Alam

    Abstract:

    Moisture- and temperature-activated corrosion of metal fingers, mechanical stress induced delamination, and Failure of solder Bonds rank among the leading Failure mechanisms of solar modules. The physics of moisture ingress, diffusion and reaction have been explored in detail, but the electrical implications of corrosion and delamination on specific front-surface grid geometry is not fully understood. In this paper, we show that the module efficiency loss due to corrosion, delamination, and solder Bond Failure (CDS) involves a complex interplay of voltage/current redistribution, reflected as a loss in photocurrent as well as decrease/increase in shunt/series resistances. Our work will redefine the interpretation of experimental J-V characteristics features due to degradation mechanisms, integrate a variety of scattered and counter-intuitive experimental results within a common theoretical framework, and inform CDS-resistant grid design for solar modules.

Y Yu – 2nd expert on this subject based on the ideXlab platform

  • Bond Failure of steel beams strengthened with frp laminates part 1 model development
    Composites Part B-engineering, 2011
    Co-Authors: S P Chiew, Y Yu

    Abstract:

    To strengthen deteriorated steel structures, Bonding fiber reinforced polymer (FRP) laminate applied externally to the steel surface is a promising method. For FRP strengthened steel structures, the Bond performance between the FRP laminate and the steel structure is a crucial consideration which will directly influence strengthening effect and determine the final capacity of the strengthened structures. To investigate the Bond Failure mechanism of FRP Bonded steel structures, experiments on three types of FRP-steel joints were conducted. The Bond strengths of different configuration joints were found out. Besides the experimental investigation, finite element analyses were also carried out to study in detail the stress and strain distributions along the Bondline. It was found that the most important factors that influence the final Bond Failure is the stress concentration at the end of the Bondline. After analyzing the mechanism of Bond Failure, a Bond Failure model based on the Failure criterion of equivalent strain energy density was proposed.

  • Bond Failure of steel beams strengthened with FRP laminates – Part 1: Model development
    Composites Part B-engineering, 2011
    Co-Authors: S P Chiew, Y Yu

    Abstract:

    To strengthen deteriorated steel structures, Bonding fiber reinforced polymer (FRP) laminate applied externally to the steel surface is a promising method. For FRP strengthened steel structures, the Bond performance between the FRP laminate and the steel structure is a crucial consideration which will directly influence strengthening effect and determine the final capacity of the strengthened structures. To investigate the Bond Failure mechanism of FRP Bonded steel structures, experiments on three types of FRP-steel joints were conducted. The Bond strengths of different configuration joints were found out. Besides the experimental investigation, finite element analyses were also carried out to study in detail the stress and strain distributions along the Bondline. It was found that the most important factors that influence the final Bond Failure is the stress concentration at the end of the Bondline. After analyzing the mechanism of Bond Failure, a Bond Failure model based on the Failure criterion of equivalent strain energy density was proposed.

  • Bond Failure of steel beams strengthened with frp laminates part 2 verification
    Composites Part B-engineering, 2011
    Co-Authors: Y Yu, S P Chiew

    Abstract:

    The application of the new Bond Failure model developed in Part 1 to predict the Bond Failure load of fiber reinforced polymer (FRP) strengthened steel beam is presented in this paper. Full-scale experiments on FRP strengthened steel beams under four-point bending were first carried out. The effects of different strengthening parameters including laminate thickness, Bond length and adhesive thickness on the Bond strength were investigated experimentally. Finite element analyses (FEA) were then conducted on the FRP strengthened steel beams. By incorporating the proposed Bond Failure model into the FEA, the equivalent strain energy density in the Bondline was calculated for Bond strength prediction. The validity of the model is assessed by comparing the Bond strengths obtained from numerical analyses against the experimental results. The advantages of this model are proven by comparing its results against those predicted by the maximum value based model. Finally, a parametric study was conducted to investigate the effects of the thickness of FRP laminate, the tensile modulus of FRP laminate, the thickness of epoxy adhesive and the Bond length on Bond strength.

S P Chiew – 3rd expert on this subject based on the ideXlab platform

  • Bond Failure of steel beams strengthened with frp laminates part 1 model development
    Composites Part B-engineering, 2011
    Co-Authors: S P Chiew, Y Yu

    Abstract:

    To strengthen deteriorated steel structures, Bonding fiber reinforced polymer (FRP) laminate applied externally to the steel surface is a promising method. For FRP strengthened steel structures, the Bond performance between the FRP laminate and the steel structure is a crucial consideration which will directly influence strengthening effect and determine the final capacity of the strengthened structures. To investigate the Bond Failure mechanism of FRP Bonded steel structures, experiments on three types of FRP-steel joints were conducted. The Bond strengths of different configuration joints were found out. Besides the experimental investigation, finite element analyses were also carried out to study in detail the stress and strain distributions along the Bondline. It was found that the most important factors that influence the final Bond Failure is the stress concentration at the end of the Bondline. After analyzing the mechanism of Bond Failure, a Bond Failure model based on the Failure criterion of equivalent strain energy density was proposed.

  • Bond Failure of steel beams strengthened with FRP laminates – Part 1: Model development
    Composites Part B-engineering, 2011
    Co-Authors: S P Chiew, Y Yu

    Abstract:

    To strengthen deteriorated steel structures, Bonding fiber reinforced polymer (FRP) laminate applied externally to the steel surface is a promising method. For FRP strengthened steel structures, the Bond performance between the FRP laminate and the steel structure is a crucial consideration which will directly influence strengthening effect and determine the final capacity of the strengthened structures. To investigate the Bond Failure mechanism of FRP Bonded steel structures, experiments on three types of FRP-steel joints were conducted. The Bond strengths of different configuration joints were found out. Besides the experimental investigation, finite element analyses were also carried out to study in detail the stress and strain distributions along the Bondline. It was found that the most important factors that influence the final Bond Failure is the stress concentration at the end of the Bondline. After analyzing the mechanism of Bond Failure, a Bond Failure model based on the Failure criterion of equivalent strain energy density was proposed.

  • Bond Failure of steel beams strengthened with frp laminates part 2 verification
    Composites Part B-engineering, 2011
    Co-Authors: Y Yu, S P Chiew

    Abstract:

    The application of the new Bond Failure model developed in Part 1 to predict the Bond Failure load of fiber reinforced polymer (FRP) strengthened steel beam is presented in this paper. Full-scale experiments on FRP strengthened steel beams under four-point bending were first carried out. The effects of different strengthening parameters including laminate thickness, Bond length and adhesive thickness on the Bond strength were investigated experimentally. Finite element analyses (FEA) were then conducted on the FRP strengthened steel beams. By incorporating the proposed Bond Failure model into the FEA, the equivalent strain energy density in the Bondline was calculated for Bond strength prediction. The validity of the model is assessed by comparing the Bond strengths obtained from numerical analyses against the experimental results. The advantages of this model are proven by comparing its results against those predicted by the maximum value based model. Finally, a parametric study was conducted to investigate the effects of the thickness of FRP laminate, the tensile modulus of FRP laminate, the thickness of epoxy adhesive and the Bond length on Bond strength.