The Finite Element Imitate of the Best Adjusting of Shear Blade Clearance of Disk Shear in Cutting Plate

2011 ◽  
Vol 422 ◽  
pp. 836-841
Author(s):  
Xian Jia ◽  
Qing Wang ◽  
Zhi Quan Huang ◽  
Qing Xue Huang
Keyword(s):  
Finite Element ◽  
Process Parameters ◽  
Steel Plate ◽  
Blade Clearance ◽  
Thick Steel ◽  
Main Factors ◽  
And Control ◽  
First Time ◽  
Relevant Factors ◽  
Disk Shear

In this paper the main factors of impacting the quality in cutting the plate between the Shear blade clearance adjustment and control were analyzed, Focused on further analyzing all relevant factors on adjusting the Shear blade clearance , combined with the accumulated process parameters in production of one certain Thick Steel Plate Plant . Proposed for the first time the mathematical models of the best adjusting of Shear blade clearance of disk shear in cutting plate，and also make a imitate testing of finite element.

The Mathematical Models of the Best Adjusting of Shear Blade Clearance of Disk Shear in Cutting Plate

2010 ◽  
Vol 145 ◽  
pp. 26-30 ◽  
Author(s):  
Zhi Quan Huang ◽  
Qing Xue Huang
Keyword(s):  
Mathematical Models ◽  
Steel Plate ◽  
Iron And Steel ◽  
Blade Clearance ◽  
Thick Steel ◽  
Main Factors ◽  
And Control ◽  
First Time ◽  
Relevant Factors ◽  
Disk Shear

In this paper the main factors of impacting the quality in cutting the plate between the Shear blade clearance adjustment and control were analyzed, Focused on further analyzing all relevant factors on adjusting the Shear blade clearance , combined with the accumulated process parameters in production of Thick Steel Plate Plant of He Bei Wen Feng Iron and Steel Co., Ltd. Proposed for the first time the mathematical models of the best adjusting of Shear blade clearance of disk shear in cutting plate.

Prediction of Residual Stress in Multi-Pass Welded Joint Using Idealized Explicit FEM

2012 ◽  
Author(s):  
Masakazu Shibahara ◽  
Shinsuke Itoh ◽  
Takashi Okada ◽  
Kazuki Ikushima ◽  
Satoru Nishikawa
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Steel Plate ◽  
Computational Time ◽  
Processing Unit ◽  
Memory Consumption ◽  
Explicit Finite Element ◽  
Thick Steel ◽  
Element Method

Heavy thick steel plate is used for pipes and also ship structures, and multi-pass welding is usually adopted for the welding. Because of the heavy thickness, residual stress plays an important role, particularly in crack propagation. Implicit Finite Element Method (FEM) is often used as a welding analysis method to examine the residual stress of the welded plate, but it is not easily applied to multi-pass welding problems with tens of thousands of degrees of freedom, because of the huge computational time and memory consumption. Alternatively, it is possible to simulate the residual stress in shorter time with lower memory consumption by using Idealized Explicit Finite Element Method developed by the authors. Moreover, the computational time can be shortened by using Idealized Explicit FEM using a Graphics Processing Unit (GPU). In this research, Idealized Explicit FEM parallelized using a GPU is applied to the analysis of the residual stresses of the multi-pass welding joint of a pipe structure made of heavy thick steel plate. As the result, the residual stress simulated by the Idealized Explicit FEM corresponds to the measured residual stress. Furthermore, it is found that the grouping method may affect to the residual stress distribution.

Finite element analysis of residual stress in hybrid laser-arc welding for butt joint of 12 mm-thick steel plate

2018 ◽  
Vol 62 (2) ◽  
pp. 289-300 ◽  
Author(s):  
Guoxiang Xu ◽  
Haichao Pan ◽  
Peng Liu ◽  
Pengfei Li ◽  
Qingxian Hu ◽  
...  
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Arc Welding ◽  
Steel Plate ◽  
Butt Joint ◽  
Element Analysis ◽  
Hybrid Laser Arc Welding ◽  
Thick Steel

Failure Analysis of Vessel Cover Under Internal Pressure Impulse

2018 ◽  
Author(s):  
Sha Yang ◽  
Qi Dong ◽  
Liucheng Zhang
Keyword(s):  
Experimental Data ◽  
Steel Plate ◽  
Impulse Loading ◽  
Simulation Data ◽  
Deformation And Failure ◽  
Containment Vessel ◽  
Vessel Closure ◽  
Thick Steel ◽  
Main Factors ◽  
Protective Performance

When under explosion, the cover of an explosion containment vessel will bear a much higher intensity of impulse loading because of the reflection and superposition of the shock waves, especially in cylindrical vessels. To assure the integrity of the explosion containment vessel closure, a thick steel plate is often used as the cover, while in the supporting part of the shell thickening or reinforcement is also needed. Tooth locks are widely used as a quick-actuating closure. Experiments and numerical simulations were conducted to examine the protective performance of the tooth lock covers. The deformation and failure results agree well with the experimental data. Three types of covers with different number of teeth are calculated. Main factors and weak spots are analyzed with the experimental data and the simulation data. This study may help in the designing of explosion containment vessels and evaluating the protective performance of vessel covers.

Development of Design and Fabrication Method for Thin Steel Plate Structure and Its Application to a Passenger Ship

1991 ◽  
Vol 7 (02) ◽  
pp. 128-135
Author(s):  
Tomoya Hamasaki
Keyword(s):  
Steel Plate ◽  
Plate Structure ◽  
Construction Methods ◽  
Passenger Ship ◽  
Hull Structure ◽  
Thin Steel ◽  
Thick Steel ◽  
Design And Methods ◽  
Thin Steel Plate ◽  
First Time

The author's company was awarded a contract to build a cruise passenger ship which had a superstructure with 4.5-mm-thick steel plate decks. Since this first-time application of 4.5 mm to the hull structure was expected to cause a lot of troubles in conjunction with plate distortion, an effort was made to establish the most appropriate standards of design and methods for thin steel plate structure. Structural design and construction methods were carefully reviewed, selected, tested and applied to the ship, and thereby they were verified throughout the actual construction processes. Successful results were obtained from both quality and cost standpoints.

Influence of Blast Wave on Behavior of Steel Plate

2014 ◽  
Vol 619 ◽  
pp. 28-32
Author(s):  
Yo Han Yoo ◽  
Young Sik Choi ◽  
Joon Won Lee
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Steel Plate ◽  
Von Mises Stress ◽  
Arbitrary Lagrangian Eulerian ◽  
Element Analysis ◽  
Conventional Weapons ◽  
Particle Hydrodynamics ◽  
Thick Steel ◽  
Von Mises

The threat of terrorism has led to increased awareness about protecting properties from damage in terrorist attacks. With the rapid growth of the computer industry and progress in the field of finite-element analysis, evaluations of conventional weapons focus more on simulations than on experiments. There are many approaches to simulate blast and impact. These include Eulerian, Lagrangian, multi-material arbitrary Lagrangian-Eulerian (MM-ALE), and the meshless approach of smooth particle hydrodynamics (SPH) methods. Each method has distinct advantages. In this study, finite-element analysis was applied to simulate a 1 kg trinitrotoluene (TNT) blast in front of a 20-mm-thick steel plate. Three different approaches were simulated: Eulerian, MM-ALE, and SPH. Each method gave different results for the von Mises stress distribution, peak pressure, and displacement of the steel plate. A comparison of the three results implies that using one of these three approaches may generate a significant blast simulation.

Development of Vertical Welding Technology for Thick Steel Plate using Hot-wire Laser Welding Method

2016 ◽  
Vol 85 (3) ◽  
pp. 282-286
Author(s):  
Motomichi YAMAMOTO ◽  
Kenji SHINOZAKI ◽  
Hiroshi YAJIMA ◽  
Tsutomu FUKUI ◽  
Shin NAKAYAMA ◽  
...  
Keyword(s):  
Laser Welding ◽  
Steel Plate ◽  
Hot Wire ◽  
Welding Method ◽  
Welding Technology ◽  
Thick Steel

The Effects of Corporate Ownership on Public Accountants' Professionalism and Ethics

2002 ◽  
Vol 16 (2) ◽  
pp. 109-124 ◽  
Author(s):  
William E. Shafer ◽  
D. Jordan Lowe ◽  
Timothy J. Fogarty
Keyword(s):  
Current Trend ◽  
Auditor Independence ◽  
Corporate Ownership ◽  
Negative Effects ◽  
Public Accounting ◽  
Corporate Acquisitions ◽  
Accounting Professionals ◽  
Research Questions ◽  
And Control ◽  
First Time

The current trend toward corporate acquisitions of CPA firms poses potential threats to the autonomy and ethical standards of public accounting professionals. This recent consolidation movement suggests that for the first time a significant number of public accounting professionals are subject to the supervision and control of nonprofessionals. In addition to acknowledging the potential threats to auditor independence and objectivity, this paper suggests that these new organizational arrangements for the provision of public accounting services have other negative effects on professionalism and ethics such as desensitizing CPAs to traditional professional values, and subverting professional institutions to the goals of corporate employers. This paper develops a framework that identifies several specific research questions related to the effects of corporate ownership on professionalism and ethics in public accounting.

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