VERSION 4.0 OF DE/CAASE COMPUTERIZED ENGINEERING HANDBOOK OFFERS WIDE RANGE
OF ADDITIONAL CAPABILITIES.

(Mahwah, New Jersey -- June 7, 1993) Desktop Engineering today announced
that version 4.0 of their DE/CAASE computerized engineering handbook has
been released. DE/CAASE greatly reduces the time required to solve
structural/mechanical engineering problems by helping the user select the
proper equation, prompting for required inputs, automatically solving the
equation and providing graphical illustrations. Version 4.0 includes three
entirely new programs as well as enhancements to 10 existing modules. The
MS-DOS release of Version 4.0 provides a completely new graphics user
interface that operates in a Windows-like environment. Version 4.0 also
operates on a Unix Platform in the X Window environment using the Motif
Window Manager and currently supports Intergraph, Sun Sparcstation and IBM
RS/6000 workstations.

The three new modules are Rotating Disks, Critical Speed of Rotating
Shafts, and Helical Springs. The Rotating Disks module analyzes four types
of rotating disks and provides output consisting of inertial radial and
tangential stress plots. The Critical Speed of Rotating Shafts module
determines the critical speed of multispan, stepped, rotating shafts
subjected to distributed or discrete masses. The shaft's critical speeds
and mode shapes are calculated and displayed. The Helical Spring module
analyzes cylindrical and conical springs with rectangular and circular
cross sections. Solutions are provided for shear stress, corrected shear
stress, rate of deflection, deflection and resistance under tensile or
compressive load. The main enhancement to existing modules include the
graphical display of all stress recovery results and analysis of annular
circular plates, nonsymmetric loading and boundary conditions for
rectangular plates, stress concentration factors for U-notch, V-notch, and
radial holes in circular shafts, and combinations of frame and truss
members.

DE/CAASE (Desktop Engineering/Computer Aided Analytical Solutions for
Engineers), incorporates solutions to over 5000 structural/mechanical
engineering applications found in over 100 reference books. It includes 41
modules grouped into the following categories: Geometric and material
properties; Beams and columns; Rings, arches and frames; Plates, shells
and pressure vessels; Natural frequencies and dynamics, stresses, cables
and springs; and utilities. Modules are self-prompting to help the user
find items like material properties and calculate section properties like
area, moment of inertia, etc. In addition, several utility modules are
included to assist the designer with complex problems. A superposition
module allows the designer to look at the effects of several concurrent
loads on the same structure. Another utility module allows the user to
calculate stresses in addition to forces and displacements calculated by
the other modules.

Once the problem is defined, the program will perform the calculations and
provide graphical and digitized output. In most cases, the program will do
the equation substitutions, integration, and boundary condition analysis
in exactly the way an engineer would solve the problem by hand. The
program also has a convenient material property database and several
modules that look at complex geometries and dynamic conditions. In some of
the more complicated analyses, the computerized handbook uses finite
elements to obtain a solution; however, the input and output format
remains similar to the other modules and the user is not required to know
finite element techniques. Although the program is self-explanatory, a
comprehensive user manual is provided along with an extensive theoretical
section which contains the equations and references for the entire
system.

Desktop Engineering is a software developer and distributor specializing in
engineering applications based in Mahwah, New Jersey. The company's other
products include DE/Mec which allows complex mechanisms to be designed
with virtually zero learning time for anyone used to laying out mechanisms
on a traditional drawing board and DE/Cartes software which provides a
revolutionary method of organizing and retrieving all types of data. The
company has Desktop Engineering Technical Centers in the United States,
England and Canada and representatives throughout Eastern Asia and Europe.
All Desktop Engineering products are available from authorized dealers
located throughout the world. For more information, contact Desktop
Engineering at 201-818-9700.

Desktop Engineering International Inc
1200 MacArthur Blvd, Mahwah, NJ 07430
201-818-9700;  fax: 201-818-9707

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