Inferring the degradation of pultruded composites from dynamic nonlinear resonance measurements

2001 ◽  
Vol 22 (4) ◽  
pp. 555-567 ◽  
Author(s):  
K. Van Den Abeele ◽  
J. Carmeliet ◽  
K. Van De Velde
Keyword(s):  
Nonlinear Resonance ◽  
Pultruded Composites

NONLINEAR RESONANCE IN CuAlNi ALLOYS

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-1025-C5-1030 ◽  
Author(s):  
M. Wuttig ◽  
T. Suzuki
Keyword(s):  
Nonlinear Resonance

Desmocomp® – Raw Materials for Pultruded Composites with Excellent Chemical and Weathering Resistance

2019 ◽  
Author(s):  
Liang Chen ◽  
James Thompson-Colón, ◽  
Alan Bushmire ◽  
Nathan Chaffin ◽  
Dan Williams ◽  
...  
Keyword(s):  
Raw Materials ◽  
Pultruded Composites ◽  
Weathering Resistance ◽  
Excellent Chemical

Nonlinear Resonance in Neuron Dynamics

1995 ◽  
Vol 50 (8) ◽  
pp. 718-726 ◽  
Author(s):  
Scott Rader ◽  
Diek W. Wheeler ◽  
W.C. Schieve ◽  
Pranab Das
Keyword(s):  
Neural Networks ◽  
Energy Transfer ◽  
Power Spectrum ◽  
Nonlinear Resonance ◽  
Nonlinear Oscillators ◽  
Hopfield Neural Networks ◽  
Neuron Dynamics

Abstract Hübler's technique using aperiodic forces to drive nonlinear oscillators to resonance is analyzed. The oscillators being examined are effective neurons that model Hopfield neural networks. The method is shown to be valid under several different circumstances. It is verified through analysis of the power spectrum, force, resonance, and energy transfer of the system.

Nonlinear Resonance Ultrasonic Spectroscopy (NRUS) for the Quality Control of Additively Manufactured Samples

2021 ◽  
pp. 102495
Author(s):  
Evan Bozek ◽  
Sam McGuigan ◽  
Zack Snow ◽  
Edward W. Reutzel ◽  
Jacques Riviere ◽  
...  
Keyword(s):  
Quality Control ◽  
Nonlinear Resonance ◽  
Ultrasonic Spectroscopy

Nonlinear-resonance line shapes: Dependence on the transverse intensity distribution of a light beam

2004 ◽  
Vol 69 (2) ◽  
Author(s):  
A. V. Taĭchenachev ◽  
A. M. Tumaikin ◽  
V. I. Yudin ◽  
M. Stähler ◽  
R. Wynands ◽  
...  
Keyword(s):  
Light Beam ◽  
Intensity Distribution ◽  
Resonance Line ◽  
Nonlinear Resonance ◽  
Line Shapes

Structural Performance of Pultruded Composites under Elevated Temperatures

2009 ◽  
Vol 79-82 ◽  
pp. 2223-2226
Author(s):  
Ayman S. Mosallam
Keyword(s):  
Elevated Temperature ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Oxidative Degradation ◽  
Viscoelastic Behavior ◽  
Structural Performance ◽  
Crystalline Polymers ◽  
Damage To The Material ◽  
Continuous Working ◽  
Pultruded Composites

One of the major limitations for wider use of pultruded fiber reinforced polymeric (PFRP) composites in the civil engineering sector has been their behavior under elevated temperature and ultimately fire. This limitation arises not only due to the reduction in mechanical properties at high temperatures, including increased propensity to creep, but also due to limitations on the continuous working temperature causing permanent damage to the material as a result of thermal and oxidative degradation. Significant gains in property retention at high temperatures with crystalline polymers have been derived from the incorporation of fibrous reinforcement, but the development of new polymer matrices is the key for further elevation of the useful temperature range. This paper presents summary results of a research project focused on characterizing the viscoelastic behavior of commercially-produced, off-the-shelf unidirectional PFRP materials subjected to elevated temperature environments.

Problems of Nonlinear Multiple-Mode Vibrations of Thin Elastic Shells of Revolution

2000 ◽  
Author(s):  
Veniamin D. Kubenko ◽  
Piotr S. Kovalchuk
Keyword(s):  
Degrees Of Freedom ◽  
Asymptotic Methods ◽  
Nonlinear Resonance ◽  
Shells Of Revolution ◽  
Elastic Shells ◽  
Resonance Amplitude ◽  
Multiple Degrees Of Freedom ◽  
Free And Forced Vibrations ◽  
Multiple Mode ◽  
Averaged Equations

Abstract A method is suggested for the calculation of nonlinear free and forced vibrations of thin elastic shells of revolution, which are modeled as dynamic systems of multiple degrees of freedom. Cases are investigated in which the shells are characterized by two or more closely-spaced eigenfrequencies. Based on an analysis of averaged equations, obtained by making use of asymptotic methods of nonlinear mechanics, a number of new first integrals is obtained, which state a regular energy exchange among various modes of cylindrical shells under conditions of nonlinear resonance. Amplitude-frequency characteristics of multiple-mode vibrations are obtained for shells subjected to radial oscillating pressure.

Internal nonlinear resonance on a charged jet

2013 ◽  
Vol 58 (5) ◽  
pp. 664-672 ◽  
Author(s):  
S. O. Shiryaeva ◽  
N. A. Petrushov ◽  
A. I. Grigor’ev
Keyword(s):  
Nonlinear Resonance ◽  
Internal Nonlinear Resonance
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