Further Applications of Plastic Bending Theory

1996 ◽  
pp. 468-526
Keyword(s):  
Plastic Bending

scholarly journals Simulation approach for three-point plastic bending of additively manufactured Hastelloy X sheets

2019 ◽  
Vol 34 ◽  
pp. 475-481 ◽  
Author(s):  
Stephan Rosenthal ◽  
Marlon Hahn ◽  
A. Erman Tekkaya
Keyword(s):  
Simulation Approach ◽  
Plastic Bending ◽  
Hastelloy X

Plastic Bending of A514 Steel Beams

1969 ◽  
Vol 95 (9) ◽  
pp. 1851-1871 ◽  
Author(s):  
John F. McDermott
Keyword(s):  
Steel Beams ◽  
Plastic Bending

Technical Basis for Application of Collapse Moments for Locally Thinned Pipes Subjected to Torsion and Bending Proposed for ASME Section XI

2014 ◽  
Author(s):  
Kunio Hasegawa ◽  
Yinsheng Li ◽  
Bostjan Bezensek ◽  
Phuong H. Hoang ◽  
Howard J. Rathbun
Keyword(s):  
Power Plants ◽  
Bending Moments ◽  
Finite Element Analyses ◽  
Pure Bending ◽  
Plastic Bending ◽  
Evaluation Procedures ◽  
Wall Thinning ◽  
Applicable Range ◽  
Technical Basis ◽  
Local Wall Thinning

Piping components in power plants may experience combined bending and torsion moments during operation. There is a lack of guidance for pipe evaluation for pipes with local wall thinning flaws under the combined bending and torsion moments. ASME B&PV Code Section XI Working Group is currently developing fully plastic bending pipe evaluation procedures for pressurized piping components containing local wall thinning subjected to combined torsion and bending moments. Using elastic fully plastic finite element analyses, plastic collapse bending moments under torsions were obtained for 4 (114.3) to 24 (609.6) inch (mm) diameter pipes with various local wall thinning flaw sizes. The objective of this paper is to introduce an equivalent moment, which combines torsion and bending moments by a vector summation, and to establish the applicable range of wall thinning lengths, angles and depths, where the equivalent moments are equal to pure bending moments.

Theoretical Basis and Technology Development of the Combined Process of Asymmetric Rolling and Plastic Bending

2012 ◽  
Vol 586 ◽  
pp. 259-264 ◽  
Author(s):  
Mikhail Sverdlik ◽  
Alexander Pesin ◽  
D.O. Pustovoytov
Keyword(s):  
Theoretical Basis ◽  
Technology Development ◽  
Dynamic Loads ◽  
Asymmetric Rolling ◽  
Plastic Bending ◽  
Combined Process ◽  
Friction Forces ◽  
Order Curve ◽  
The Moment ◽  
Rolling Technology

The article focuses at technology development of the vertical asymmetric rolling and combined process of vertical asymmetric rolling and plastic bending. It has been shown that vertical asymmetric rolling peculiarity relates to the presence of a mixed zone, in which friction forces on contact roll surfaces are directed are differently. Experimental research showed serious drawbacks in the rolling technology caused by the growth of dynamic loads arising at the moment of plate contact with the bending roller. For solving the problem it was proposed to make the roller position motile to allow its movement along the required trajectory. The application of the motile roller helps to reduce dangerous torque differentiation at working rolls by the value of 1,5-2,5 compared with the rigidly fixed roller. The most effective bending roller trajectory is a second-order curve that is convex parabola.

Creep of Metals at High Temperature in Bending

1938 ◽  
Vol 5 (1) ◽  
pp. A29-A31
Author(s):  
E. A. Davis
Keyword(s):  
High Temperature ◽  
Plastic Bending ◽  
Theoretical Results

Abstract The author develops a theory for plastic bending and obtains equations for the creep due to bending. Results of tests on a chromium-nickel composition are given to show the agreement between the experimental and theoretical results.

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