Now showing items 1-9 of 9

    • Automating structural modeling of composites enriched by X-ray micro-tomography and digital imaging data 

      Iliopoulos, Athanasios P.; Michopoulos, John G.; Steuben, John C.; Birnbaum, Andrew J.; Lua, Jim Y.; Karuppiah, Anand Vijay; Seneviratne, Waruna P.; Saathoff, Caleb (ASME, 2018)
      The manufacturing processes of Fiber Reinforced Polymers (FRPs) as composite materials are frequently prone to the creation of various types of undesired morphologies and defects. These can include layer waviness, inclusions, ...
    • A combined X-Ray CT and mechanistic characterization of bearing failure mechanisms in bolted composite components 

      Cui, Xiaodong; Xiao, Jian; Lua, Jim Y.; Kariyawasam, Supun; Fulghum, Ethan; Saathoff, Caleb (Vertical Flight Society, 2021-05)
      This paper presents the characterization of bearing failure mechanisms in composite joints with countersunk bolt by applying an X-ray Computed Tomography (XCT) technique and a developed bearing failure model to build the ...
    • Composite drilling characterization and performance evaluation 

      Xiao, Jian; Pham, Dinh Chi; Lua, Jim Y.; Saathoff, Caleb; Seneviratne, Waruna P. (DEStech Publications, 2019-09)
      Hole drilling is one of the most widely used operations in order to place bolts or rivets. Drilling holes in composites leads to drilling-induced defects and damages such as delamination, burr, microcracking, swelling, ...
    • Compressive response of composite laminates with defects 

      Cui, Xiaodong; Karuppiah, Anand Vijay; Pham, Dinh Chi; Lua, Jim Y.; Saathoff, Caleb; Seneviratne, Waruna P. (American Institute of Aeronautics and Astronautics Inc, 2020-01-05)
      Defects are inevitable in the manufacture and service of composite laminates and their influence on the mechanical performance of composite laminates can be substantial. Ply waviness and delamination are two major types ...
    • Defects characterization and evaluation of their effects on compressive failure of composite components 

      Cui, Xiaodong; Pham, Dinh Chi; Karuppiah, Anand Vijay; Lua, Jim Y.; Saathoff, Caleb; Seneviratne, Waruna P. (DEStech Publications, 2019-09)
      In the design and certification of composite structural components for aircrafts, compression and combined compression and shear loading cases have to be considered. Various forms of defects such as ply waviness, delamination ...
    • Defects characterization, damage mapping, and property evaluation of composites 

      Lua, Jim Y.; Sadeghirad, Alireza; Cui, Xiaodong; Karuppiah, Anand Vijay; Saathoff, Caleb; Seneviratne, Waruna P. (DEStech Publications Inc., 2018)
      The presence of voids in the composite laminates can reduce the mechanical properties in composites and these voids can become precursors in the activation of other failure modes such as delamination. Knowing the volume ...
    • Experimental and numerical failure analyses of composite cruciform under biaxial static and cyclic loading 

      Pham, Dinh Chi; Xiao, Jian; Lua, Jim Y.; Perera, Shenal; Saathoff, Caleb (American Institute of Aeronautics and Astronautics Inc, AIAA, 2021-01)
      The characterization and prediction of multiaxial fatigue of composite structures have become a very important topic since aircraft composite structures and their repaired bonded structures are unavoidably subjected to ...
    • High-fidelity response prediction and failure evaluation of tapered composite components under multiaxial loading 

      Xiao, Jian; Liu, Phillip; Pham, Dinh Chi; Cui, Xiaodong; Lua, Jim Y.; Perera, Shenal; Saathoff, Caleb (American Institute of Aeronautics and Astronautics Inc, AIAA, 2021-01)
      This paper presents an accurate and efficient modeling approach for high-fidelity 3D stress prediction and failure initiation and propagation modeling of tapered composite flexbeams with multiple ply drops subjected to ...
    • Progressive damage and failure prediction of interlaminar tensile specimen with initial fabrication induced defects 

      Cui, Xiaodong; Karuppiah, Anand Vijay; Pham, Dinh Chi; Lua, Jim Y.; Saathoff, Caleb; Seneviratne, Waruna P. (DEStech Publications Inc., 2018)
      An automatic solution process to evaluate the effects of fabrication induced defects in composite components is developed. The framework of this approach includes defects extraction from the X-ray computed tomography (CT) ...