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Related Concept Videos

Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

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The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
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Residual Stresses in Bending01:18

Residual Stresses in Bending

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In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
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Unsymmetric Bending - Angle of Neutral Axis01:15

Unsymmetric Bending - Angle of Neutral Axis

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Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
538
Unsymmetric Bending01:18

Unsymmetric Bending

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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
537
Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

294
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
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Shear and Bending Moment Diagram: Problem Solving01:24

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When analyzing a beam supporting concentrated loads and a distributed load, drawing the shear and bending moment diagrams is essential. These diagrams help understand the internal forces and moments acting on the beam, which is crucial for designing safe and efficient structures. Follow these steps to create the shear and bending moment diagrams:
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Related Experiment Video

Updated: Oct 20, 2025

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
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A Versatile Punch Stroke Correction Model for Trial V-Bending of Sheet Metals Based on Data-Driven Method.

Yongsen Yu1,2, Zhiping Guan1,2, Mingwen Ren1,2

  • 1Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130022, China.

Materials (Basel, Switzerland)
|September 10, 2021
PubMed
Summary

This study introduces a data-driven method to correct punch stroke in sheet metal air bending. A neural network model effectively guides trial bending, reducing iterations and improving production efficiency.

Keywords:
V-bendingdimensional analysisneural networkpunch strokespringback

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Manufacturing Processes

Background:

  • Springback in sheet metal air bending necessitates iterative punch stroke correction.
  • Current trial-and-error methods are time-consuming and reduce production efficiency.

Purpose of the Study:

  • To develop a data-driven modeling method for accurate punch stroke correction in sheet metal air bending.
  • To guide trial bending processes and enhance forming accuracy.

Main Methods:

  • Generated large datasets using finite element simulations, varying material, die, blank dimensions, and processing parameters.
  • Developed two punch stroke correction models: one using neural networks and another using dimensional analysis.
  • Validated models through analytical comparison and actual trial bending tests.

Main Results:

  • The neural network model demonstrated superior suitability for guiding trial bending compared to dimensional analysis.
  • The neural-network-based model showed high versatility and accuracy in practical applications.
  • Significant reduction in the number of trial bends required was achieved.

Conclusions:

  • A data-driven, neural-network-based approach effectively corrects punch stroke in sheet metal air bending.
  • This method improves forming accuracy, reduces trial bending iterations, and boosts overall production efficiency.