Computer-Assisted Strain-Gage Monitoring and Data Reduction System


Book Description

The objective of this program was to design and build a computer-based strain gage monitoring system (SGMS) for the Wright-Patterson Air Force Base (WPAFB) using state-of-the-art electronics to assist in real-time monitoring and subsequent reduction and analysis of compressor analog data. During aerodynamic and aeromechanical testing at the WPAFB Compressor Research Facility (CRF), the SGMS monitors blade and vane stress level data provided by sensors attached to a turbine engine compressor. The system monitors vibratory responses, provides ample warning of compressor component failure, and assists test engineers in data analysis. On-line data are presented to the test engineers via a graphics display terminal and printed reports. Keywords: Data reduction, Alarm limits. (Author) (kr).




Strain Gage Users' Handbook


Book Description

This highly detailed handbook is a resource for those entering the field of stress analysis and instrumentation. The authors were brought together to provide their expert experience and have presented many practical solutions.




Calibration of Strain-gage Installations in Aircraft Structures for the Measurement of Flight Loads


Book Description

A general method has been developed for calibrating strain-gage installations in aircraft structures, which permits the measurement in flight of the shear of lift, the bending moment, and the torque or pitching moment on the principle lifting or control surfaces. Although the stress in structural members may not be a simple function of the three loads of interest, a straightforward procedure is given for numerically combining the outputs of several bridges in such a way that the loads may be obtained. Extensions of the basic procedure by means of electrical combination of the strain-gage bridges are described which permit compromises between strain-gage installation time, availability of recording instruments, the data reduction time. The basic principles of strain-gage calibration procedures are illustrated by reference to the data for two aircraft structures of typical construction, one a straight and the other a swept horizontal stabilizer.




Reports


Book Description




Experimental Stress Analysis


Book Description

Designing and manufacturing structures of all kinds in an economic and a safe way is not possible without doing experimental stress analysis. The modernity of structures, with their higher reliability demands, as well as today's more stringent safety rules and extreme environmental conditions necessitate the improvement of the measuring technique and the introduction of new ones. Although theoretical/mathematical analysis is improving enormously, an example of which is the finite element model, it cannot replace experimental analysis and vice versa. Moreover, the mathematical analysis needs more and more accurate parameter data which in turn need improved experimental investigations. No one can do all those investigations on his own. Exchange of knowledge and experience in experimental stress analysis is a necessity, a thing acknowledged by every research worker. Therefore, the objective of the Permanent Committee for Stress Analysis (PC SA) is to promote the organization of conferences with the purpose disseminating new research and new measuring techniques as well as improvements in existing techniques, and furthermore, to promote the exchange of experiences of practical applications with techniques. rhis Vlllth International Conference on Experimental Stress Analysis on behalf of the PC SA is one in a series which started in 1959 at Delft (NL), and was followed by conferences at Paris (F), Berlin-W, Cambridge (~K), Udine (I), Munich (FRG) and Haifa (Isr.). Such a Conference will be held in Europe every fourth year, half-way bewteen the IUTAM Congresses.