Now showing items 1-20 of 45

    • ACG MTM45-1: Material Model Development Final Project Wrap-Up 

      Shahkarami, A.; Van Ee, D. (Wichita State University. National Institute for Aviation Research, 2009-11-15)
      National Center for Advanced Material Performance document prepared by: A. Shahkarami and D. Van Ee. Reviewed by: D. Van Ee Approved: A.Poursartip. Date: November 15th, 2009 Version: 1.0
    • Additive manufactured polymer test coupons: Issues and solutions 

      Andrulonis, Rachael; Lovingfoss, Royal; Tomblin, John S. (ASTM International, 2020-06-04)
      Leveraging the experience and lessons learned from the National Center for Advanced Material Performance (NCAMP) and the Composite Materials Handbook-17 (CMH-17) composite material databases, a new qualification program ...
    • Allowable generation and generic basis value for multiple loading and environmental conditions 

      Hajiha, Reza; Godines, Cody; De Fenza, De Fenza, Angelo; Baid, Harsh Kumar; Clarkson, Elizabeth P.; Moazami, Nima; Abdi, Frank (CAMX, 2020)
      Engineers conduct expensive testing in different environmental conditions to obtain the necessary material allowables. These values consider scatter in composite material constituents and structure according to the “Building ...
    • Aluminium in human brain tissue from donors without neurodegenerative disease: A comparison with Alzheimer's disease, multiple sclerosis and autism 

      Exley, Christopher; Clarkson, Elizabeth P. (Springer, 2020-05-08)
      A burgeoning number of studies are demonstrating aluminium in human brain tissue. While research has both quantified and imaged aluminium in human brain tissue in neurodegenerative and neurodevelopmental disease there are ...
    • Automated fiber placement (AFP)--Effects of features and defects 

      Seneviratne, Waruna P.; Tomblin, John S.; Shafie, Mohamed Z.; Perera, Shenal; Smith, Garret (DEStech Publications, 2019-09)
      Automated Fiber Placement (AFP) manufacturing methods, considered to be one of the most advanced methods of composite manufacturing, are used in fabricating complex and large scale composite structures. During AFP ...
    • Automated fiber placement (AFP)—Effects of features and defects 

      Seneviratne, Waruna P.; Tomblin, John S.; Shafie, Mohamed Z.; Perera, Shenal; Smith, Garret (DEStech Publications, 2019)
      Automated Fiber Placement (AFP) manufacturing methods, considered to be one of the most advanced methods of composite manufacturing, are used in fabricating complex and large scale composite structures. During AFP ...
    • Automated scanning techniques using UR5 

      Lopez-Hawa, Homar; VanPelt, Alexander; Emmanuel, Suveen; Yihun, Yimesker S. (Hindawi, 2019-02-03)
      This study seeks to advance technologies pertaining to integration of low-cost collaborative robots to perform scanning operations where moderate accuracy is needed. Part inspection is an almost universal aspect of ...
    • 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 case for Tsai's Modulus, an invariant-based approach to stiffness 

      Ateiro, Albertino; Sharma, Naresh; Melo, Jose Daniel Diniz; Seneviratne, Waruna P. (Elsevier, 2020-11-15)
      For the past six years, we have been benefiting from the discovery by Tsai and Melo (2014) that the trace of the plane stress stiffness matrix (tr(Q)) of an orthotropic composite is a fundamental and powerful scaling ...
    • Chapter 39 -- Updating composite materials handbook-17 volume 5— ceramic matrix composites 

      Douglas Kiser, J.; David, Kaia E.; Davies, Curtis; Missri-Andrulonis, Rachael; Ashforth, Cindy (Wiley, 2018)
      This chapter discusses the updated version of CMH‐17 Volume 5—Ceramic Matrix Composites handbook released in 2002, which provides a more comprehensive overview of current Ceramic Matrix Composites (CMC) technology. Emphasis ...
    • 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 ...
    • Coupon-level mechanical testing for polymer-based additive manufacturing 

      Park, Chul Y.; Rupel, Keith E.; Henry, Chelsey E.; Palliyaguru, Upul R. (ASTM International, 2020-06-04)
      The term additive manufacturing (AM) is used to describe processes of joining materials to make parts from a three-dimensional model data, as opposed to subtractive manufacturing. Although AM technology offers potential ...
    • Crack length correction and root rotation angle in a sandwich single cantilever beam (SCB) fracture specimen 

      Saseendran, Vishnu; Carlsson, Leif A.; Berggreen, Christian; Seneviratne, Waruna P. (KeAi Publishing Communications Ltd, 2020-12)
      Crack root rotation is a measure of deviation from clamped boundary conditions of region in front of the crack tip. The root rotation depends on the shear force and bending moment acting at the crack tip. Such rotation ...
    • Crashworthiness by analysis: verifying FEA modeling capabilities by accident reconstruction 

      Zinzuwadia, Chandresh M.; Olivares, Gerardo; Ly, Hoa T.; Gomez Valbuena, Luis M. (ASCE, 2018-11-15)
      A finite element (FE) model of a generic single-aisle narrow body transport aircraft was used for computational crash analysis to compare simulated deformations to those observed in the Turkish Airline Flight 1951 crash ...
    • Damage growth analysis of sandwich structures subjected to combined compression and pressure loading 

      Seneviratne, Waruna P.; Tomblin, John S.; Perera, Shenal; Varatharaj, Pirashandan (DEStech Publications, 2019-09)
      Fluid-ingression phenomena in composite sandwich structures is a concern for components employed in the aerospace industry. Poor design/material selections, impact damages, thermo-mechanical loads occurring during ...
    • Damage initiation and fracture analysis of honeycomb core single cantilever beam sandwich specimens 

      Saseendran, Vishnu; Varatharaj, Pirashandan; Perera, Shenal; Seneviratne, Waruna P. (SAGE, 2020-04-27)
      Fracture testing and analysis of aerospace grade honeycomb core sandwich constructions using a single cantilever beam test methodology is presented here. Influence of various parameters such as facesheet thickness, core ...
    • Damage mechanisms in tapered composite structures under static and fatigue loading 

      Rao, Prabhakar M.; Gurvich, Mark R.; Palliyaguru, Upul R.; Seneviratne, Waruna P. (DEStech Publications, 2019-09)
      In this work an integrated computational/experimental approach was developed to validate the predictive capabilities of State-of-the-Art (SoA) Progressive Damage Analysis (PDA) methods and tools. Specifically, a tapered ...
    • 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 ...