Showing papers on "Vibration fatigue published in 1969"
01 Feb 1969
TL;DR: In this article, an elastic structure involving cross correlations between two randomly varying excitation forces was used to measure the response of an elastomer structure with respect to the response response of a vibrator.
Abstract: : Contents: Electrical generation of motion in elastomers; Controlled deceleration specimen protection systems for electrodynamic vibration systems; Control techniques for simultaneous three-degree-of-freedom hydraulic vibration system; Initial report on equivalent damage measurement by utilizing S/N fatigue gages; Hologram interferometry as a practical vibration measurement technique; Response of an elastic structure involving cross correlations between two randomly varying excitation forces; Automatic normalization of structural mode shapes; Resonant beam high 'G' vibration testing; The use of liquid squeeze- films to support vibrating loads; Point-to-point correlation of sound pressures in reverberation chambers; Environmental laboratory missile failure rate test with aerodynamic function simulation; Apollo CSM dynamic test program; Modal survey results from the Mariner Mars 1969 spacecraft; Uprated Saturn I full scale dynamic test correlation; An approach for duplicating spacecraft flight- induced body forces in a laboratory; Flexure guides for vibration testing; A compression-fastened general-purpose vibration and shock fixture; Vibration equivalence, fact or fiction; Providing realistic vibration test environments to tactical guided missiles; The reduction of the vibration level of a circular shaft moving transversely through water at the critical Reynolds number; Analysis and design of resonant fixtures to amplify vibrator output.
37 citations
TL;DR: In this paper, the effects and control of dissipative heating of a working specimen and the role of efficient matrix-to-fiber stress transfer are considered, and a test procedure with which the severity of dissipation can be continuously followed and controlled during an accelerated fatigue test is described.
Abstract: The fatigue failure of thermoplastics and glass-reinforced thermoplastics is a function of cyclic stress or deflection level, test frequency, viscoelastic polymer parameters and matrix-to-fiber stress transfer. This paper reports an investigation of the modes of high frequency fatigue failure in glass-reinforced and unreinforced thermoplastics. In particular the effects and control of dissipative heating of a working specimen and the role of efficient matrix-to-fiber stress transfer are considered. A test procedure with which the severity of dissipative heating can be continuously followed and controlled during an accelerated fatigue test is described.
30 citations
01 Jan 1969
TL;DR: In this paper, the maximal vibratory response of linear excited system to time modulated stationary random vibration is estimated, in terms of the number of vibrations produced by the system.
Abstract: Approximated maximal vibratory response of linear excited system to time modulated stationary random vibration
4 citations