Exploratory Study of Energy Dissipation at Aircraft Structural Joints

1962 ◽  
Vol 34 (5) ◽  
pp. 729-730
Author(s):  
Eric E. Ungar ◽  
Creighton M. Gogos
Keyword(s):  
Energy Dissipation ◽  
Exploratory Study ◽  
Structural Joints

scholarly journals EXPERIMENTAL ANALYSIS OF STRUCTURAL DAMPING FOR BOLTED AND WELDED SPLICE CONNECTION JOINT FOR IPE-80 STEEL PROFILE

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Ognjen Mijatović ◽  
Zoran Mišković ◽  
Ratko Salatić ◽  
Rastislav Mandić ◽  
Valentina Golubović-Bugarski ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Experimental Analysis ◽  
Damping Capacity ◽  
Dynamic Problems ◽  
Structural Damping ◽  
Structural Joints

Progress and demands of all types of constructions imposed the need for the development of modernstructures that are lightweight, but at the same time have high damping capacity and stiffness. Theconsequences of these requirements are increased dynamic problems related to vibrations anddissipative processes in structure connection joints. Structural joints are the main reason for thesignificant reduction of the level of energy dissipation and source of structural damping so thereforethey have become a subject of interest to many researchers. The aim of this paper is to present someproblems regarding research of structural damping and the importance of study Contact Mechanicsto better understand the problem of structural damping.

Damping in Structural Joints Subjected to Tangential Loads

1991 ◽  
Vol 205 (2) ◽  
pp. 121-129 ◽  
Author(s):  
K K Padmanabhan ◽  
A S R Murty
Keyword(s):  
Energy Dissipation ◽  
Machine Tools ◽  
Structural Response ◽  
Joint Damping ◽  
Metallic Interfaces ◽  
Structural Joints ◽  
Tangential Forces ◽  
Machine Tool Structures ◽  
Series Of Experiments ◽  
Excellent Source

Metallic mating surfaces in machine joints offer an excellent source of energy dissipation, resulting in damped dynamic structural response, for example in machine tools. This paper describes the results of a series of experiments where the energy loss per cycle occurring at preloaded flat metallic interfaces subjected to cyclic tangential forces are measured. The effects of certain pertinent joint variables on the joint damping effectiveness are investigated. The results should be useful to the designers of machine tool structures, where damping occurring in joints is important.

The Damping of Structural Vibration by Controlled Interfacial Slip in Joints

1983 ◽  
Vol 105 (3) ◽  
pp. 369-373 ◽  
Author(s):  
C. F. Beards
Keyword(s):  
Energy Dissipation ◽  
Dynamic Response ◽  
Maximum Energy ◽  
Structural Vibration ◽  
Significant Source ◽  
Interfacial Slip ◽  
Clamping Force ◽  
Joint Damping ◽  
Resonance Frequencies ◽  
Structural Joints

The most significant source of damping inherent in a structure is that damping which occurs in the structural joints due to interfacial slip. Thus, particular emphasis should be put on controlling and increasing the damping which occurs in these joints if the dynamic response, stress, and noise of a structure are to be reduced. It is shown that an optimum joint clamping force exists for maximum energy dissipation due to slip, and that the resonance frequencies of structures can be controlled to some extent by adjusting the clamping and, hence, the slip, in joints. The application of joint damping to beam-like structures, plates, and frameworks is considered, and its effect on the vibration of these structures discussed.

Energy dissipation in rotary structural joints

1977 ◽  
Vol 54 (4) ◽  
pp. 577-588 ◽  
Author(s):  
R.S.H. Richardson ◽  
H. Nolle
Keyword(s):  
Energy Dissipation ◽  
Structural Joints

A hospital clerkship program for dental students: an exploratory study

1969 ◽  
Vol 33 (2) ◽  
pp. 224-229
Author(s):  
EA Stuebner ◽  
RP Johnson
Keyword(s):  
Exploratory Study ◽  
Dental Students

Classifying Disfluencies in Preschool- and School-Age Spanish–English Bilinguals Who Do Not Stutter: An Exploratory Study

2020 ◽  
Vol 5 (1) ◽  
pp. 119-130
Author(s):  
Raúl Rojas ◽  
Farzan Irani
Keyword(s):  
Exploratory Study ◽  
Evidence Base ◽  
Medium Effect ◽  
Bilingual Children ◽  
Linear Regression Models ◽  
Cross Sectional ◽  
Total Percentage ◽  
Narrative Production ◽  
Language Measures ◽  
Mean Length Of Utterance

Purpose This exploratory study examined the language skills and the type and frequency of disfluencies in the spoken narrative production of Spanish–English bilingual children who do not stutter. Method A cross-sectional sample of 29 bilingual students (16 boys and 13 girls) enrolled in grades prekindergarten through Grade 4 produced a total of 58 narrative retell language samples in English and Spanish. Key outcome measures in each language included the percentage of normal (%ND) and stuttering-like (%SLD) disfluencies, percentage of words in mazes (%MzWds), number of total words, number of different words, and mean length of utterance in words. Results Cross-linguistic, pairwise comparisons revealed significant differences with medium effect sizes for %ND and %MzWds (both lower for English) as well as for number of different words (lower for Spanish). On average, the total percentage of mazed words was higher than 10% in both languages, a pattern driven primarily by %ND; %SLDs were below 1% in both languages. Multiple linear regression models for %ND and %SLD in each language indicated that %MzWds was the primary predictor across languages beyond other language measures and demographic variables. Conclusions The findings extend the evidence base with regard to the frequency and type of disfluencies that can be expected in bilingual children who do not stutter in grades prekindergarten to Grade 4. The data indicate that %MzWds and %ND can similarly index the normal disfluencies of bilingual children during narrative production. The potential clinical implications of the findings from this study are discussed.

Disfluency: An Exploratory Study of the Effects of Subcortical Stroke

2009 ◽  
Vol 36 (Fall) ◽  
pp. 149-156
Author(s):  
Charles Ellis ◽  
Maude Rittman
Keyword(s):  
Exploratory Study

An exploratory study from the patients' perspective of living with allergies

1997 ◽  
Vol 6 (5) ◽  
pp. 371-377
Author(s):  
Wendy Zernike ◽  
Tracie Corish ◽  
Sylvia Henderson
Keyword(s):  
Exploratory Study ◽  
Patients Perspective
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