Absolute phase analysis method for three-dimensional surface profilometry using frequency-modulated grating

2003 ◽  
Vol 42 (5) ◽  
pp. 1249 ◽  
Author(s):  
Yasuyuki Ikeda
Keyword(s):  
Phase Analysis ◽  
Three Dimensional ◽  
Analysis Method ◽  
Surface Profilometry ◽  
Absolute Phase ◽  
Dimensional Surface

Three-dimensional surface profilometry using structured liquid crystal grating

1999 ◽  
Author(s):  
Ken Yamatani ◽  
Hiroo Fujita ◽  
Masayuki Yamamoto ◽  
Akira Suguro ◽  
Yukitoshi Otani ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Three Dimensional ◽  
Surface Profilometry ◽  
Liquid Crystal Grating ◽  
Dimensional Surface

Spectral interference Mirau microscope with an acousto-optic tunable filter for three-dimensional surface profilometry

2003 ◽  
Vol 42 (7) ◽  
pp. 1296 ◽  
Author(s):  
Dalip Singh Mehta ◽  
Shohei Saito ◽  
Hideki Hinosugi ◽  
Mitsuo Takeda ◽  
Takashi Kurokawa
Keyword(s):  
Three Dimensional ◽  
Tunable Filter ◽  
Spectral Interference ◽  
Surface Profilometry ◽  
Dimensional Surface

scholarly journals A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method

2020 ◽  
Author(s):  
Ameen Topa ◽  
Burak Can Cerik ◽  
Do Kyun Kim
Keyword(s):  
Numerical Simulations ◽  
Maximum Stress ◽  
Three Dimensional ◽  
Material Model ◽  
Arbitrary Lagrangian Eulerian ◽  
Analysis Method ◽  
Seamless Pipe ◽  
Ale Formulation ◽  
Dimensional Surface ◽  
Good Agreement

The development of numerical simulations is potentially useful in predicting the most suitable manufacturing process and ultimately improving product quality. Seamless pipes are manufactured by rotary piercing process in which round bars are fed between two rolls and pierced by a stationary plug. During this process, the material undergoes severe deformation which renders it impractical to be modelled and analysed with conventional finite element methods. In this paper, three dimensional numerical simulations of the piercing process are performed with Arbitrary Lagrangian-Eulerian (ALE) Formulation in LS DYNA software. Details about the material model as well as the elements formulations are elaborated here and mesh sensitivity analysis was performed. The results of the numerical simulations are in good agreement with experimental data found in the literature and the validity of the analysis method is confirmed. The effects of varying workpiece velocity, process temperature, and wall thickness on the maximum stress levels of the product material/pipes are investigated by performing simulations of sixty scenarios. Three dimensional surface plots are generated which can be utilized to predict the maximum stress value at any given combination of the three parameters.

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