Interface Waves for Detecting Defects in Bonded Hybrid Joints

2020 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Interface Waves ◽  
Hybrid Joints

Interface Waves in Hybrid Metal-Composite Structures

2016 ◽  
Author(s):  
Mohammadreza Jahanbin ◽  
Sridhar Santhanam ◽  
Jeong-Beom Ihn
Keyword(s):  
Composite Structures ◽  
Guided Waves ◽  
Element Model ◽  
Hybrid Structure ◽  
Hybrid Structures ◽  
Metal Composite ◽  
Bonded Joints ◽  
Interface Waves ◽  
Hybrid Joints ◽  
Simulation Based

Damage nucleation and growth can be complex in hybrid structures composed of layers of metal and laminated composites. Presently there are limited reliable damage growth analytical and empirical methods to evaluate the bond integrity of such structures and to quantify the state of bonding in such joints. Depending on the geometry and accessibility of hybrid joints, ultrasonic nondestructive testing (NDT) techniques are available for inspection of these structures. However there are some limitations for the usage of typical bulk or guided waves to quantify the integrity of bondline in hybrid structures. This work suggests the use of specific forms of ultrasonic guided waves that propagate along the bondline of these hybrid structures. This study is dedicated to modeling of interface guided waves for the purpose of disbond crack damage assessment. The nature of interface waves is discussed and the numerical simulation based on the material properties and geometries of hybrid interfaces as well as composite stacking sequence is verified. A finite element model of a hybrid structure with isotropic and anisotropic multilayer composites is constructed. The behavior of interface guided waves influenced by disbond cracks at free edges of hybrid bonded joints is numerically studied. The propagation characteristics of interface waves is shown to be sensitive to the size of disbond cracks. The velocity of interface waves is shown to have an inverse relation to the disbond damage size. Results show the speed is also a function of the interfacing ply orientation at the bondline. These results suggest that interface waves can be used to monitor the condition of bonded joints in hybrid structures.

scholarly journals Investigation of joints from laser powder fusion processed and conventional material grades of 18MAR300 nickel maraging steel

2021 ◽  
Author(s):  
W. Tillmann ◽  
L. Wojarski ◽  
T. Henning
Keyword(s):  
Tensile Strength ◽  
Maraging Steel ◽  
Solid Material ◽  
High Volume ◽  
Heat Treatment Condition ◽  
Hybrid Joint ◽  
Hybrid Joints ◽  
Laser Systems ◽  
Conventional Material ◽  
The Individual

AbstractEven though the buildup rate of laser powder bed fusion processes (LPBF) has steadily increased in recent years by using more and more powerful laser systems, the production of large-volume parts is still extremely cost-intensive. Joining of an additively manufactured complex part to a high-volume part made of conventional material is a promising technology to enhance economics. Today, constructors have to select the most economical joining process with respect to the individual field of application. The aim of this research was to investigate the hybrid joint properties of LBPF and conventionally casted 18MAR300 nickel maraging steel depending on the manufacturing process and the heat treatment condition. Therefore, the microstructure and the strength of the hybrid joints manufactured by LPBF or vacuum brazing were examined and compared to solid material and joints of similar material. It was found that the vacuum-brazed hybrid joints using a 50.8-μm-thick AuNi18 foil provide a high tensile strength of 904 MPa which is sufficient for a broad field of application. Furthermore, the additively manufactured hybrid samples offered with 1998 MPa a tensile strength more than twice as high but showed a considerable impact of buildup failures to the strength in general.

Interface waves propagating along tensile fractures in dolomite

1995 ◽  
Vol 22 (20) ◽  
pp. 2773-2776 ◽  
Author(s):  
Sanjit Roy ◽  
Laura J. Pyrak-Nolte
Keyword(s):  
Interface Waves ◽  
Tensile Fractures

scholarly journals Friction Riveting of glass–fibre-reinforced polyetherimide composite and titanium grade 2 hybrid joints

2013 ◽  
Vol 50 ◽  
pp. 825-829 ◽  
Author(s):  
L. Blaga ◽  
R. Bancilă ◽  
J.F. dos Santos ◽  
S.T. Amancio-Filho
Keyword(s):  
Glass Fibre ◽  
Hybrid Joints ◽  
Glass Fibre Reinforced ◽  
Titanium Grade
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