Journal ArticleDOI
Prediction of impact forces using Hertzian contact theory and measured modal structural data
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In this paper, a method is presented for predicting the impact force between a mass of known velocity and a structure using measured frequency response functions to characterise the dynamics of the underlying structure and a Hertzian model of the local contact stiffness at the point of impact.About:
This article is published in Mechanical Systems and Signal Processing.The article was published on 1990-07-01. It has received 6 citations till now. The article focuses on the topics: Impact & Contact mechanics.read more
Citations
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Journal ArticleDOI
Identification of contact parameters from elastic-plastic impact of hard sphere and elastic half space
TL;DR: In this paper, a nonlinear contact model based on power law is used to extract the contact stiffness and frequency of contact resonance from these two main contact parameters, and the test results show that the adopted model using independently measured material data can predict the contact parameters due to hard sphere impact with elastic half space.
Journal ArticleDOI
Analysis of elastic and plastic impact models
TL;DR: In this paper, the analysis of elastic and plastic models for the determination of impact resistance from impact data of a spherical indenter and an elastic-plastic material is presented, where the impact wear depth for normal impact has been analytically and experimentally verified in terms of time to plastic deformation.
Book ChapterDOI
Estimation of Impact Force by an Inverse Analysis
TL;DR: In this article, an inverse problem of impact force is studied, in which an impact force acting on a body of arbitrary shape is estimated from responses induced at any point of the body.
Journal ArticleDOI
Theoretical analysis of characteristics and influencing factors for channel fracturing conductivity
TL;DR: In this paper, a generalized conductivity model is established by considering the embedment and pillar geometry of the proppant, and the interrelationships and interactions among embedment, permeability, conductivity models are derived analytically.
Nonsmooth impact mechanics of a free falling body
TL;DR: In this paper, the authors present a list of tables, figures, and abbreviations for each of the following categories: Table, Figure, Table, and Abbreviation.
References
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Book
Wave Motion in Elastic Solids
TL;DR: In this article, a comprehensive study of elastic wave propagation in solids is presented, ranging from the theory of waves and vibrations in strings to the three-dimensional theory of elastic waves in thick plates.
Book
Linear control system analysis and design
TL;DR: This paper presents a meta-modelling architecture suitable for linear control system analysis and design and some examples of such systems have been designed and tested in the wild.
Journal ArticleDOI
Impact Force Prediction Using Measured Frequency Response Functions
R. J. Thornhill,Craig C. Smith +1 more
TL;DR: In this article, a method for predicting impact forces using measured frequency response functions when an ideal mass elastically impacts a stationary structure was presented, where a frequency response function measured at the point of impact on the structure together with the impactor's mass and velocity can be used to form a function which, after inverse Fourier transformation yields the predicted force.
Journal ArticleDOI
Time Aliasing: A Digital Data Processing Phenomenon
R. J. Thornhill,Craig C. Smith +1 more
TL;DR: In this article, the frequency sampling theorem is interpreted for a function of frequency which was sampled either directly or indirectly by spectral identification techniques, and a generalized window is developed which implements a zoom inverse discrete Fourier transform for avoiding undesirable time aliasing effects.