3315 Meadow Wood Drive
Richardson, TX 75082
Tel: 972/480-8680 Fax: 972/480-8682
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Design Software Compatibility Pressure Sciences performs mechanical design and analysis with a variety of software. We have comprehensive installations of the latest versions of both ANSYS and ALGOR for Finite Element Analysis of components and systems. |
General Capabilities and Experience
including, but not limited to:
| These pictures show the results of preliminary analyses using LS-DYNA to determine the effectiveness of various configurations and combinations of energy absorbing material to protect the front head of a propane tanker. This run simulates the response of 15 inches of a dense foam material to a frontal impact. |
The vessel shown to the right was rerated for a reduced
MDMT (minimum design metal temperature) after 3 years in service, using
a combination of heat treatment, spectrographic analysis, impact testing,
and engineering analysis. The 12 inch nozzle prominent in the photo
was added at one of the locations where material was removed for testing.
Many individual items on the vessel had to be certified for the lower design
temperature in order to achieve National Board and State Chief Inspector
acceptance of the modification.
Additional
capabilities include:
Challenges Met::
FEA Stress Analysis of Reactor Pipe Cross
Pressure Sciences was contracted by a large Engineering
and Construction firm to perform a complex 3D FEA and code qualification
stress evaluation of a pressurized cross reactor vessel. For this job,
PSI selected ANSYS, and developed an FEA mesh of 3136 8-node isoparametric
shell elements. We were able to demonstrate that the maximum calculated
stress intensities in the most critical crotch region were within allowable
code limits. To the left is an illustration of the model developed
by Pressure Sciences.
Message From the President, Allen Selz, Ph.D., P.E.
*** Dr. Selz Elected Fellow of the ASME ***
See November 1997 Mechanical Engineering magazine
(private email: aselz@press-sci.com ; c.v. )
More Projects
This is a recently completed 3D ANSYS model of a 10 inch nozzle on a 30 inch OD elbow, for which Pressure Sciences provided the design basis ASME stress analysis for a large manufacturer in the US. The nozzle provides entry through the pressure boundary for an agitator shaft into a large pressure vessel, and is thus a pressure vessel component rather than a pipe. Because of the large opening in the elbow, pressure stresses were excessively high in the original design, and traditional vessel design software was not well suited to the task. Several analysis iterations and physical modifications were evaluated before converging on this arrangement, which meets all Section VIII, Division 1 material stress limits, although a Division 2 design by analysis approach was utilized. |
Pressure Sciences provided this high pressure stainless steel vessel under a design / build contract for a client in the electronics industry. The vessel was designed for quick access to the contents and for a high number of cycles. Its features include a fail-safe closure mechanism to mitigate against an operator error in closing, and minimized personnel lifting loads, to address OSHA guidelines. It is 11.8 inches tall, and 8.5 inches OD in the lower portion. The stainless steel components were precision machined by Gentile Manufacturing Co., Leechburg, PA, and tested / certified by an ASME U-Stamp holder - Harliss Specialties Inc., Irwin, PA. |
Detailed information is available for the following topics by clicking below.
Please call or email us to discuss the areas in which we can help you with your current problems. Inquiries may be directed to Dr. Selz.
Pressure Sciences
Incorporated
3315 Meadow Wood Drive
Richardson, Texas 75082
Telephone: (972) 480-8680
Fax: (972) 480-8682
Finalist, Pittsburgh 100 Fastest Growing Companies, 1999
ASME Region V Industry Recognition Awardee for 1997