Mechanics of Sheet Metal Forming, Second Edition by Jack Hu Ph.D. Mechanical Engineering University of

By Jack Hu Ph.D. Mechanical Engineering University of Michigan, Zdzislaw Marciniak, John Duncan

The easy idea of sheet steel forming within the automobile, equipment and airplane industries is given. This fills a spot among the descriptive remedies in such a lot production texts and the complicated numerical equipment utilized in computer-aided-design systems.

The booklet can be used by way of academics in undergraduate classes in production; abundant workouts and labored examples offer quantitative instructional difficulties for college kids. A separate, yet comparable simulation software program package deal marketed in this web page allows scholars to discover the boundaries of tactics and comprehend the impact of other strategy and fabric variables.

Engineers in stamping vegetation and press retailers locate the ebook beneficial in realizing what occurs in the course of forming and why mess ups take place. The publication is usually used as a textual content for business brief classes which have been given in lots of international locations. Die designers and tooling engineers locate the straightforward therapy of tactics valuable on the conceptual layout degree and in addition in deciding upon ameliorations had to conquer difficulties indicated by way of unique numerical analysis.

The unique textual content, released 10 years in the past, has been thoroughly rewritten for this variation and more moderen themes resembling hydroforming integrated. uncomplicated equations governing plastic deformation, press forming, bending, punch stretching and deep drawing are derived and defined. the purpose is to supply uncomplicated acceptable equipment instead of complicated numerical concepts for training engineers and for college students drawn to a quantitative and sensible approach.

SIMPLIFIED STAMPING SIMULATION software program "4S'

The analytical remedy during this ebook is used to advance simulation modules for easy situations of sheet forming comparable to stamping, deep drawing, bending and hydroforming. scholars can examine the impression of tooling dimensions, fabric houses and procedure variables equivalent to friction at the consequence of operations and spot from lively versions how, for instance, press quite a bit strengthen in the course of forming. purposes utilizing this package deal vastly improve curiosity within the improvement of concept within the book.

The site http://www.mssinternational.com offers extra details and a chance to run the various modules.

  • Presents the basics of sheet steel forming - bending, stretching, press forming, deep drawing and hydroforming
  • Shows how deformation, so much and approach limits will be calculated utilizing uncomplicated equations
  • Concentrates on uncomplicated, appropriate tools instead of advanced numerical techniques
  • Contains many workouts, labored examples and solutions
  • Used as a reference textual content in undergraduate production classes, as a required textual content in expert graduate classes and as a direction textual content for commercial brief courses
  • Is supported by means of a separate, yet similar simulation software program package deal defined below

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Additional resources for Mechanics of Sheet Metal Forming, Second Edition

Example text

Although there are major differences in the mathematical form of these two criteria, the values of stress predicted for any given value of α will not differ by more than 15%. 8 Yield locus for plane stress for a von Mises yield condition. 5 The flow rule A yield theory allows one to predict the values of stress at which a material element will deform plastically in plane stress, provided the ratio of the stresses in the plane of the sheet and the flow stress of the material are known. In the study of metal forming processes, we will also need to be able to determine what strains will be associated with the stress state when the element deforms.

A number of tests have been devised in which sheet is deformed in a particular process using standard tooling. Examples include drawing a cup, stretching over a punch and expanding a punched hole. The principles of these tests are covered in later chapters. 4 Exercises Ex. 1 A tensile specimen is cut from a sheet of steel of 1 mm thickness. 5 mm and the gauge length is 50 mm. 0563 mm. Determine the initial yield stress and the elastic modulus. 41. Determine the R-value. 88] Ex. 66 kN respectively.

2(b) for a general plane stress sheet process. 2(b), in terms of either the strain ratio β or the stress ratio α. For a proportional process, which is the only kind we are considering, both will be constant. 2 Principal stresses and strains for elements deforming in (a) uniaxial tension and (b) a general plane stress sheet process. principal directions so that σ1 > σ2 and the third direction is perpendicular to the surface where σ3 = 0. 6) σ3 = 0 The constant volume condition is used to obtain the third principal strain.

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