Browsing NIAR: National Institute for Aviation Research by Title
Now showing items 34-53 of 57
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Integration of instance-based learning and computed torque control for an effective assist-as-needed support in human-exoskeleton interaction
(Association for Industry, Engineering and Management Systems (AIEMS), 2022-12)The physiological responses that arise from human-robot interaction may vary across subjects in magnitude and rate. Such individual variations may require instance-based learning over model-based learning algorithms. For ... -
Learning robotic grasping strategy based on natural-language object descriptions
(IEEE, 2018-10)Given the description of an object's physical attributes, humans can determine a proper strategy and grasp an object. This paper proposes an approach to determine grasping strategy for an anthropomorphic robotic hand simply ... -
Material state monitoring using embedded sensors for validating models for detecting process-induced damages in polymer composites
(DEStech Publications Inc., 2018)Composite material cure recipes are based on manufacturer-recommended cure cycle inputs, which are developed as a result of various stochastic cure kinetics models during the development of resin formulation. The time, ... -
Measuring and estimating rotary joint axes of an articulated robot
(IEEE, 2020-04-29)The aim of this article is to chronicle a novel methodology for measuring and estimating rotary joint axes of an articulated robot. The key contribution of the proposed methodology is a practical way of estimating rotary ... -
Mechanics-based model for rapid prediction of low-velocity impact damage in composite laminates
(American Institute of Aeronautics and Astronautics Inc., 2020-08-03)A mechanics-based modeling approach is developed to rapidly predict damage in polymer matrix composites resulting from a low-velocity impact event. The approach is incorporated into a computer code that provides an efficient ... -
Mechanics-based modeling approach for rapid prediction of low velocity impact damage in composite laminates
(merican Institute of Aeronautics and Astronautics Inc, 2020-01-05)A mechanics-based modeling approach is developed to rapidly predict damage in polymer matrix composites resulting from a low velocity impact event. The approach is incorporated into a computer code that provides an efficient ... -
A micro-macro coupling and physics informed modeling approach for bearing failure with x-ray CT characterization
(AIAA SCITECH, 2022-01-03)The failure mechanism of composite bolted joints was investigated using an in-situ X-ray CT technique with SSB test. A physics-informed modeling approach was proposed based on the traditional CDM method and a static bearing ... -
Multi-scale characterization of an adhesive bondline with fabrication induced defects
(DEStech Publications, Inc., 2015)A multiscale characterization of an adhesive bondline is performed to investigate the fabrication defects dependent failure mechanisms of an I-beam under four point bending. To obtain a realistic representative volume of ... -
Multiaxial fatigue damage assessment of repaired composite cruciform specimens using stress ratio dependent fatigue damage accumulation model
(American Institute of Aeronautics and Astronautics, Inc., 2021-12-29)The paper presents a combined experimental and numerical study of multiaxial fatigue damage accumulation in scarf-repaired cruciform specimens subjected to fatigue loading. The existing fatigue analysis module is improved ... -
Numerical studies on buckling and post-buckling behavior of stiffened curved composite panel with repairs
(DEStech Publications, 2019-09)Composite stiffened panels are widely employed in the aircraft industry. In particular, curved panels stiffened with hat-stringers are utilized in fuselages. The panels comprise of very thin skin to which stringers are ... -
Parasitic effects of including microwire sensor tube on in-plane compressive strength of carbon-fiber reinforced polymeric composite laminates
(DEStech Publications, 2019-09)The influence of embedding a titanium alloy sensor tube in carbon fiber-reinforced polymer (CFRP) composite laminates on the in-plane compressive strength has been presented. These sensor tubes cause geometric disturbances ... -
Performance evaluation of child safety seats in far-side lateral sled tests at varying speeds
(Association for the Advancement of Automotive Medicine, 2009-10-05)Protection of children in Child Safety Seats (CSS) in side impact crashes has been a topic of recent studies. The objective of this study was to evaluate the performance of CSS in far-side impacts through a series of sled ... -
Progressive damage and failure analysis of bonded composite joints at high energy dynamic impacts
(DEStech Publications, 2019-09)Both wing and fuselage structures utilize bonded composite joints for structural efficiency in modern commercial and military aircraft. To ensure compliance with certification requirements mechanical fasteners are typically ... -
Progressive damage and failure prediction of interlaminar tensile specimen with initial fabrication induced defects
(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) ... -
Progressive damage mechanisms in thick 3D composites structures under static and fatigue loading
(DEStech Publications, 2020-09)The objective of this work is to demonstrate validation of predictive capabilities capturing both damage initiation and growth under static and fatigue loading in geometrically complex three-dimensional (3D) composite ... -
Reduced allowable strength of composite laminate for unknown distribution due to limited tests
(SAGE Publications, 2020-02-06)In design under uncertainty, random distributions are often determined by expensive sampling tests. A key question is whether to invest in more samples or live with a reduced performance by fewer samples due to large ... -
Refill Friction Stir Spot Joining for aerospace aluminum alloys
(Springer, 2017)Refill Friction Stir Spot Joining (RFSJ) developed by Kawasaki Heavy Industries (KHI) is a derivative technology of friction stir spot welding for joining aerospace aluminum alloys. The aerospace aluminum alloys were ... -
Refill friction stir spot welding of surface-treated aerospace aluminum alloys with faying-surface sealant
(Elsevier, 2019-06)Refill friction stir spot welding (RFSSW) is a derivative of friction stir spot welding (FSSW). Unlike conventional FSSW, it does not leave behind an exit hole in the workpiece. Kawasaki Heavy Industries (KHI) developed a ... -
Scraping sticky leftovers: App user information left on servers after account deletion
(IEEE, 2022-07-27)Sixty-five percent of mobile apps require user accounts for offering full-fledged functionality. Account information includes private data, e.g., address, phone number, credit card. Our concern is "leftover" account data ... -
Simulation framework for autonomous search and rescue UAVs
(American Institute of Aeronautics and Astronautics, Inc., 2022-06-15)This paper presents the capabilities of the Simcenter-based simulation framework for modeling and validating hybrid autonomous aircraft systems and flight missions. This is accomplished by modeling the drone subsystems in ...