Observed transition from linear to non-linear friction–load behavior using a lateral force microscope

2006 ◽  
Vol 252 (14) ◽  
pp. 4964-4968 ◽  
Author(s):  
Mark G. Reitsma ◽  
Robert G. Cain ◽  
Simon Biggs ◽  
David W. Smith
Keyword(s):  
Lateral Force ◽  
Non Linear ◽  
Linear Friction ◽  
Load Behavior ◽  
Lateral Force Microscope

Microstructure and Mechanical Properties at the Unsteady Areas of Non-Linear Friction Stir Welding

2007 ◽  
Vol 561-565 ◽  
pp. 1059-1062 ◽  
Author(s):  
H. Takahara ◽  
Masato Tsujikawa ◽  
Sung Wook Chung ◽  
Y. Okawa ◽  
Kenji Higashi
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Welding Parameter ◽  
Butt Joints ◽  
Friction Stir ◽  
Non Linear ◽  
Linear Friction ◽  
Fsw Parameters ◽  
Five Axis ◽  
Welding Direction

The influence of tool control in non-linear friction stir welding (FSW) on mechanical properties of joints was investigated. FSW is widely applied to linear joints. It is impossible for five axis FSW machines, however, to keep all the FSW parameters in optimum conditions at non-linear welding. Non-linear FSW joints should be made by compromise with the order of priority for FSW parameters. The tensile test results of butt joints with rectangular change in welding direction on plate plane (L-shaped butt joints) with various welding parameter change. It was found that turn to the retreating side is encouraged when welding direction change. And the method of zero inclination tool angle is effective at non-linear and plane welding.

A non-linear friction work formulation for the analysis of self-excited vibrations

2019 ◽  
Vol 443 ◽  
pp. 328-340 ◽  
Author(s):  
Z. Zhang ◽  
S. Oberst ◽  
J.C.S. Lai
Keyword(s):  
Non Linear ◽  
Linear Friction

scholarly journals Graphene used as a lateral force microscopy calibration material in the low-load non-linear regime

2018 ◽  
Vol 89 (11) ◽  
pp. 113902 ◽  
Author(s):  
Mathias J. Boland ◽  
Jacob L. Hempel ◽  
Armin Ansary ◽  
Mohsen Nasseri ◽  
Douglas R. Strachan
Keyword(s):  
Lateral Force ◽  
Linear Regime ◽  
Lateral Force Microscopy ◽  
Force Microscopy ◽  
Low Load ◽  
Non Linear ◽  
Calibration Material

scholarly journals Comparison of Balance and Out of Balance Main Battle Tank Armaments

2001 ◽  
Vol 8 (3-4) ◽  
pp. 167-174 ◽  
Author(s):  
David J. Purdy
Keyword(s):  
Vertical Acceleration ◽  
Non Linear ◽  
Linear Friction ◽  
Moving Platform

It has been commonly thought that stabilising an out of balance gun on a moving platform (tank or ship) is very difficult or impossible to achieve. Using models of a balanced and out of balance gun on a main battle tank this is shown not to be the case. The models of the guns used, include the effect of non-linear friction and out of balance. To improve the stabilisation of the out of balance gun, trunnion vertical acceleration feedforward is used.

Simultaneous Measurement of Surface Topography and Friction Force by a Single-Head Lateral Force Microscope

1995 ◽  
Vol 117 (2) ◽  
pp. 334-340 ◽  
Author(s):  
C.-J. Lu ◽  
Zhaoguo Jiang ◽  
D. B. Bogy ◽  
T. Miyamoto
Keyword(s):  
Friction Coefficient ◽  
Surface Topography ◽  
Friction Force ◽  
Rotation Angle ◽  
Point Contact ◽  
Lateral Force ◽  
Wear Depth ◽  
Optical Head ◽  
Lateral Force Microscope ◽  
Normal Deflection

Although friction force measurements using one sensor to detect both the normal deflection and rotation angle of a scanning probe are convenient and popular, the critical issues regarding the calibration of the instruments have not been fully studied. A Lateral Force Microscope (LFM), modified from the Point Contact Microscope (PCM), is used to simultaneously measure the surface topography and friction force. An optical head is used to measure the normal bending deflection and rotation angle of the cantilever that carries the diamond tip. Emphasis is put on the development of reliable calibration procedures for obtaining the normal deflection and rotation sensitivities of the optical head as well as the spring constants in the bending and torsion modes. The friction loop, which is essential for friction measurements, is investigated in detail. The LFM is used to measure a two-phase composite to show its ability to distinguish different materials on a surface. Wear tests on a single-crystal silicon <100> surface show different friction coefficient regimes, depending on the applied load. For small loads, there is no wear and the friction coefficient is constant. For larger loads, the friction coefficient and wear depth increase with normal load.

Smart Piezoelectric PZT Microcantilevers with Inherent Sensing and Actuating Abilities for AFM and LFM

1996 ◽  
Vol 459 ◽  
Author(s):  
C. Lee ◽  
T. Itoh ◽  
J. Chu ◽  
T. Ohashi ◽  
R. Maeda ◽  
...  
Keyword(s):  
Sample Surface ◽  
Lateral Force ◽  
Smart Structure ◽  
Thin Layers ◽  
Force Sensing ◽  
Free Standing ◽  
Atomic Force ◽  
Lateral Force Microscope ◽  
Dynamic Scanning ◽  
Piezoelectric Charge

ABSTRACTNovel designs of the force sensing components for an atomic force microscope (AFM) and lateral force microscope (LFM) have been proposed in this study. By using PZT thin layers, a smart structure that can perform force sensing and feedback actuation at the same time is applied to the AFM. Clear images can be derived by an AFM equipped with this smart structure. A structure of two parallel PZT bars integrated on a SiO2 free standing cantilever has shown potential for operation in an LFM, because a difference in the piezoelectric charge outputs from these two beams will be induced by frictional force when the cantilever end quasi-staticly contacts with the sample surface in dynamic scanning across the surface.

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