New ESDU CD-ROMs Give Easy Access to Design Methods, Data, and Programs Validated by International Experts.

ENGLEWOOD, Colo.--(BUSINESS WIRE)--October 28, 1998--

ESDU Dynamics, Heat Transfer, Fatigue, Vibration and Acoustic

Fatigue, and Noise CD-ROMs help aerospace engineers improve

design and reduce research time

IHS Engineering Products today announced six new aerospace-related ESDU (Engineering Sciences Data Unit) design research tools on CD-ROM: Dynamics; Fatigue - Endurance Data; Fatigue - Fracture Mechanics; Heat Transfer; Noise; and Vibration and Acoustic Fatigue.

Each ESDU title provides desktop access to in-depth analysis and data that has been validated by appointed committees of international industry and academic experts. This highly reliable data helps engineers improve design, performance, testing, and methodology. The ESDU Data Service streamlines engineering processes by giving engineers "ready-to-apply" methods, data, examples, programs, equations, and guidance notes. Companies can reduce time-to-market and leverage valuable engineering resources.

o Dynamics addresses the stability, response, and controllability of systems that can be modeled, for some part of their motion, by linear constant coefficient differential equations. Topics covered include: equations of motion, conversion formulas for rotation and translation of body axes, geometric and kinematic relationships for various axis systems, measures of damping, aircraft loading, aeroelasticity, responsive systems, servo-mechanics, parameter estimation, and much more.

o Fatigue - Endurance Data provides methods and data for strength calculations, primarily on aircraft and aerospace structures. It contains constant amplitude stress-endurance curves (S-N curves) for aircraft materials and structural joints. The data primarily deals with "safe-life design."

o Fatigue - Fracture Mechanics contains methods and data for strength calculations, primarily on aircraft and aerospace structures. Principles of linear elastic fracture mechanics are employed to provide data for strength analysis of cracked or flawed structures, or components.

o Heat Transfer deals with evaluation and prediction of the performance of heat transfer equipment, and the costing of heat exchangers. Step-by-step calculation methods are given, as well as indications of the limits of applicability and accuracy of empirical correlations.

o Noise provides reliable methods for the prediction of sound levels generated by various sources, and provides an understanding of the control and suppression of aircraft noise. It addresses jet noise, propeller noise, airframe noise, and boundary layer noise, as well as topics with wider industrial application such as noise barriers and sound propagation.

o Vibration and Acoustic Fatigue helps engineers investigate the possibility of acoustic fatigue. It provides simple and efficient methods for estimating the response and fatigue life of aerospace structures, including fiber-reinforced composites, when subjected to acoustic loading.

Twelve of the 20 ESDU hardcopy titles are now available on CD-ROM. Other titles of particular interest to the aerospace industry include Composites; Fluid Mechanics; Internal Flow, and Structures. The full ESDU collection addresses a wide range of specific aerospace, process, structural, and mechanical engineering topics and will be available on CD-ROM by year-end.

The ESDU Data Service is developed by renowned London-based ESDU International, plc, a division of IHS Engineering. ESDU has actively pursued excellence in design engineering for over 55 years. Guided by expert technical, volunteer committees, ESDU engineers gather, evaluate, and process the world's knowledge on engineering topics spanning four broad fields: aerospace, process, structural, and mechanical. The ESDU knowledge base combines applicable data, equations, charts, graphs, and computer programs into over 1,200 concise Data Items that address specific engineering issues.

IHS Engineering Products is the worldwide leader for engineering, technical, and regulatory information published in a variety of media, from CD-ROM to Internet to intranet. IHS Group is a leading international publisher of databases with annual sales of approximately $440 million. Its companies serve the vital information needs of customers across the world's technical, business, and professional sectors. IHS Group employs over 3,000 people worldwide.

For more information call IHS Engineering Products on 800-716-3447, ext. 202; fax [phone]; or e-mail [e-mail]. Outside the U.S. and Canada call [phone] or fax [phone].

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