Browsing NIAR Research Publications by Title
Now showing items 1-20 of 43
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ACG MTM45-1: Material Model Development Final Project Wrap-Up
(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 -
Allowable generation and generic basis value for multiple loading and environmental conditions
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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 ... -
Crack length correction and root rotation angle in a sandwich single cantilever beam (SCB) fracture specimen
(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
(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
(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
(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
(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
(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
(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 ... -
Development and validation of finite element impact models of high-density UAS components for use in air-to-air collision simulations
(Taylor and Francis Inc., 2020-05-18)Understanding the severity of mid-air collisions between lightweight fixed-wing unmanned aerial systems (FW-UASs) and manned aircraft is a critical flight safety issue. Finite element models of high-density FW-UAS components ...