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1 to 10 of 25 Results
Composite Materials Defects Characterrization Using Rapidly Acquired Leaky Lamb Wave Dispersion Data
May 25, 1998
Bar-Cohen, Yoseph; Mal, Ajit K., 1998, "Composite Materials Defects Characterrization Using Rapidly Acquired Leaky Lamb Wave Dispersion Data", https://hdl.handle.net/2014/22700, Copenhagen, Denmark, JPL Open Repository
No abstract provided
Noninvasive Medical Diagnostics & Treatment Using Ultrasonics
Oct 20, 1997
Bar-Cohen, Yoseph; Grandia, Willem; Siegel, Robert, 1997, "Noninvasive Medical Diagnostics & Treatment Using Ultrasonics", https://hdl.handle.net/2014/22607, Pittsburgh, PA, USA, JPL Open Repository
No abstract provided
Transition of Space Technologies to NDE
Oct 10, 1997
Bar-Cohen, Yoseph, 1997, "Transition of Space Technologies to NDE", https://hdl.handle.net/2014/22626, Cerritos, California, USA, JPL Open Repository
No abstract provided
Autonomous Rapid Inspection of Aerospace Structures
Sep 30, 1997
Bar-Cohen, Yoseph, 1997, "Autonomous Rapid Inspection of Aerospace Structures", https://hdl.handle.net/2014/22566, El Paso, Texas, USA, JPL Open Repository
Effective assurance of the integrity and performance of aging aircraft sturnctures, particularly those that are made of composite materials, requires rapid inspection of large area. Removal from the aircraft for NDE at an inspection facility is no economical and preferable the in...
Autonomous Rapid Inspection of Aerospace Structures
Sep 30, 1997
Bar-Cohen, Yoseph, 1997, "Autonomous Rapid Inspection of Aerospace Structures", https://hdl.handle.net/2014/22158, El Paso, Texas, USA, JPL Open Repository
Aging aircraft structures and composite materials are requiring rapid inspection of large areas. Removal from the aircraft for NDE at an inspection facility is not economical as compared to field inspection. Detection and characterization of defects are labor intensive, time cons...
Improved Material Characterization of Composites Using Plate Wave Dispersion Data
Aug 3, 1997
Bar-Cohen, Yoseph; Lin, Shyh-Shiuh; Mal, Ajit K.; Chang, Z., 1997, "Improved Material Characterization of Composites Using Plate Wave Dispersion Data", https://hdl.handle.net/2014/22449, San Diego, California, USA, JPL Open Repository
No abstract provided
Rapid Characterization of the Degradation of Composites Using Plate Waves Dispersion Data
Aug 3, 1997
Bar-Cohen, Yoseph; Lih, Shyh-Shiuh, 1997, "Rapid Characterization of the Degradation of Composites Using Plate Waves Dispersion Data", https://hdl.handle.net/2014/22599, San Diego, California, USA, JPL Open Repository
NDE methods are needed to determine the structure integrity, stiffness and durability of structures and they can be extremely useful in assuring the performance of structures using smaller safety factors.
Rotary Ultrasonic Motors Actuated by Traveling Flexural Waves
Mar 3, 1997
Lih, Shyh-Shiuh; Bar-Cohen, Yoseph, 1997, "Rotary Ultrasonic Motors Actuated by Traveling Flexural Waves", https://hdl.handle.net/2014/21826, San Diego, California, USA, JPL Open Repository
Ultrasonic rotary motors are being developed as acutators for miniature spacecraft insturments and subsystems. The technology that has emerged in commercial products requires rigorous analytical tools for effective design of such motors. An analytical model was developed to exami...
Wave Propagation in Anisotropic Composite Plates
Nov 27, 1996
Mal, Ajit; Guo, Dawei; Bar-Cohen, Yoseph; Lih, Shyh-Shiuh, 1996, "Wave Propagation in Anisotropic Composite Plates", https://hdl.handle.net/2014/27348, Nara, Japan, JPL Open Repository
This paper is concerned with the development of wave propagation based cost-effective ultrasonic techniques for the nondestructive materials and defects characterization in advanced structural composites. A theoretical model that captures the most significant features of wave phe...
(abstract) NDE and Advanced Actuators at JPL
Nov 22, 1996
Bar-Cohen, Yoseph, 1996, "(abstract) NDE and Advanced Actuators at JPL", https://hdl.handle.net/2014/27607, Los Angeles, CA, JPL Open Repository
JPL is responsible for deep space exploration using spacecraft and telerobotic technologies. Since all JPL's missions are one of a kind and hardware dependent, the requirements for nondestructive evaluation (NDE) of the materials and structures that are employed are significantly...
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