scholarly journals Crack length correction and root rotation angle in a sandwich single cantilever beam (SCB) fracture specimen

2020 ◽  
Vol 3 (4) ◽  
pp. 426-434
Author(s):  
Vishnu Saseendran ◽  
Leif A. Carlsson ◽  
Christian Berggreen ◽  
Waruna Seneviratne
Keyword(s):  
Crack Length ◽  
Cantilever Beam ◽  
Rotation Angle ◽  
Fracture Specimen

Deflection Computations of the Double Composite Cantilever Beam

2013 ◽  
Vol 401-403 ◽  
pp. 97-101
Author(s):  
Juan Wei ◽  
Wen Pu Shi
Keyword(s):  
Cantilever Beam ◽  
Composite Beam ◽  
Rotation Angle ◽  
Small Deformation ◽  
Beam Deflection ◽  
Vertical Force ◽  
Smooth Interface ◽  
Angle Function ◽  
Supporting Condition ◽  
The Given

Considering of the hypothesis of small deformation, the deflection approximate differential equation of beam and integration equation theory and numerical methods are used to the deflection problems of the double composite cantilever beam. The deflection problem of the double composite beam with smooth interface under a point vertical force acting on the beam end are analyzed concretely, the analytical solutions of the touching distributing force and the cross section rotation angle function are given, and the concrete method of computing the beam deflection is put forward based on the Gauss-Legendre integration formula, the results of the given example show the validity. The methods and the conclusions here can be extended to study the deflection problems of composite cantilever beam with arbitrary layers and the deflection problems of composite beams with other supporting condition, they are important to the designs of the engineering beams.

scholarly journals Vibration Analysis of Cracked Cantilever Beam with Varying Crack Length

2020 ◽  
Vol 05 (05) ◽  
pp. 251-257
Author(s):  
Dr. Amit M Patil ◽  
Amol M Kolhe ◽  
Chetanraj D Patil
Keyword(s):  
Crack Length ◽  
Cantilever Beam ◽  
Vibration Analysis

Structure and migration of planar defects in crystals observed in atomic scale

1978 ◽  
Vol 36 (1) ◽  
pp. 284-285 ◽  
Author(s):  
H. Hashimoto ◽  
Y. Sugimoto ◽  
Y. Takai ◽  
H. Endoh
Keyword(s):  
Electron Microscope ◽  
Rotation Angle ◽  
Crystal Surface ◽  
Electron Gun ◽  
Atomic Scale ◽  
Present Observation ◽  
Twist Boundary ◽  
Optical Magnification ◽  
Zinc Crystal ◽  
And Migration

As was demonstrated by the present authors that atomic structure of simple crystal can be photographed by the conventional 100 kV electron microscope adjusted at “aberration free focus (AFF)” condition. In order to operate the microscope at AFF condition effectively, highly stabilized electron beams with small energy spread and small beam divergence are necessary. In the present observation, a 120 kV electron microscope with LaB6 electron gun was used. The most of the images were taken with the direct electron optical magnification of 1.3 million times and then magnified photographically.1. Twist boundary of ZnSFig. 1 is the image of wurtzite single crystal with twist boundary grown on the surface of zinc crystal by the reaction of sulphur vapour of 1540 Torr at 500°C. Crystal surface is parallel to (00.1) plane and electron beam is incident along the axis normal to the crystal surface. In the twist boundary there is a dislocation net work between two perfect crystals with a certain rotation angle.

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