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A Practical Engineering Approach To Predicting Fatigue Crack Growth In Riveted Lap Joints
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Book Synopsis A Practical Engineering Approach to Predicting Fatigue Crack Growth in Riveted Lap Joints by : C. E. Harris
Download or read book A Practical Engineering Approach to Predicting Fatigue Crack Growth in Riveted Lap Joints written by C. E. Harris and published by . This book was released on 2000 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive experimental database has been assembled from very detailed teardown examinations of fatigue cracks found in rivet holes of fuselage structural components. Based on this experimental database, a comprehensive analysis methodology was developed to predict the onset of widespread fatigue damage in lap joints of fuselage structure. Several computer codes were developed with specialized capabilities to conduct the various analyses that make up the comprehensive methodology. Over the past several years, the authors have interrogated various aspects of the analysis methods to determine the degree of computational rigor required to produce numerical predictions with acceptable engineering accuracy. This study led to the formulation of a practical engineering approach to predicting fatigue crack growth in riveted lap joints. This paper describes the practical engineering approach and compares predictions with the results from several experimental studies.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721204663 Total Pages :40 pages Book Rating :4.2/5 (46 download)
Book Synopsis A Practical Engineering Approach to Predicting Fatigue Crack Growth in Riveted Lap Joints by : National Aeronautics and Space Administration (NASA)
Download or read book A Practical Engineering Approach to Predicting Fatigue Crack Growth in Riveted Lap Joints written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive experimental database has been assembled from very detailed teardown examinations of fatigue cracks found in rivet holes of fuselage structural components. Based on this experimental database, a comprehensive analysis methodology was developed to predict the onset of widespread fatigue damage in lap joints of fuselage structure. Several computer codes were developed with specialized capabilities to conduct the various analyses that make up the comprehensive methodology. Over the past several years, the authors have interrogated various aspects of the analysis methods to determine the degree of computational rigor required to produce numerical predictions with acceptable engineering accuracy. This study led to the formulation of a practical engineering approach to predicting fatigue crack growth in riveted lap joints. This paper describes the practical engineering approach and compares predictions with the results from several experimental studies. Harris, C. E. and Piascik, R. S. and Newman, J. C., Jr. Langley Research Center NASA/TM-2000-210106, NAS 1.15:210106, L-17956
Book Synopsis A Practical Engineering Approach to Predicting Fatigue Crack Growth in Riveted Lap Joints by : Charles E. Harris
Download or read book A Practical Engineering Approach to Predicting Fatigue Crack Growth in Riveted Lap Joints written by Charles E. Harris and published by . This book was released on 2000 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Crack Growth in Riveted Joints by : Scott Anthony Fawaz
Download or read book Fatigue Crack Growth in Riveted Joints written by Scott Anthony Fawaz and published by . This book was released on 1997 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Riveted Lap Joints in Aircraft Fuselage by : Andrzej Skorupa
Download or read book Riveted Lap Joints in Aircraft Fuselage written by Andrzej Skorupa and published by Springer Science & Business Media. This book was released on 2012-06-23 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue of the pressurized fuselages of transport aircraft is a significant problem all builders and users of aircraft have to cope with for reasons associated with assuring a sufficient lifetime and safety, and formulating adequate inspection procedures. These aspects are all addressed in various formal protocols for creating and maintaining airworthiness, including damage tolerance considerations. In most transport aircraft, fatigue occurs in lap joints, sometimes leading to circumstances that threaten safety in critical ways. The problem of fatigue of lap joints has been considerably enlarged by the goal of extending aircraft lifetimes. Fatigue of riveted lap joints between aluminium alloy sheets, typical of the pressurized aircraft fuselage, is the major topic of the present book. The richly illustrated and well-structured chapters treat subjects such as: structural design solutions and loading conditions for fuselage skin joints; relevance of laboratory test results for simple lap joint specimens to riveted joints in a real structure; effect of various production and design related variables on the riveted joint fatigue behaviour; analytical and experimental results on load transmission in mechanically fastened lap joints; theoretical and experimental analysis of secondary bending and its implications for riveted joint fatigue performance; nucleation and shape development of fatigue cracks in riveted longitudinal lap joints; overview of experimental investigations into the multi-site damage for full scale fuselage panels and riveted lap joint specimens; fatigue crack growth and fatigue life prediction methodology for riveted lap joints; residual strength predictions for riveted lap joints in a fuselage structure. The major issues of each chapter are recapitulated in the last section.
Book Synopsis A Root-Mean-Square Approach for Predicting Fatigue Crack Growth Under Random Loading by : CM. Hudson
Download or read book A Root-Mean-Square Approach for Predicting Fatigue Crack Growth Under Random Loading written by CM. Hudson and published by . This book was released on 1981 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A round-robin analysis was conducted which evaluated and compared different methods currently in practice for predicting crack growth under random loading. This report describes the prediction method used by the Fracture Mechanics Engineering Section (FMES) at NASA-Langley Research Center. It also presents the ratios of the predicted lives to the test lives for eleven of the thirteen specimens tested.
Book Synopsis NASA Langley Scientific and Technical Information Output: 1999 by :
Download or read book NASA Langley Scientific and Technical Information Output: 1999 written by and published by . This book was released on 2000 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Analysis of a Paper Airplane by : Michael R. Urban Ph.D.
Download or read book Fatigue Analysis of a Paper Airplane written by Michael R. Urban Ph.D. and published by Covenant Books, Inc.. This book was released on 2023-10-02 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accounting for fatigue loadings has been a concern ever since the widespread introduction of metallic materials into load-bearing components in the nineteenth century. Calculations were developed based on the analysis capabilities of their time incorporating all the latest technologies of their era. At the time, that technology was pencil-and-paper calculations. Today's calculations are computer-based. The widespread use of computing methods has greatly enhanced the analyst abilities for simulating internal stress and strain fields. Unfortunately, current fatigue analyses often force-fit current stress field calculations into fatigue analysis methods meant for nineteenth century stress calculation methods. It's never a good idea to force methods optimized for pre-computer calculations to work with computers. This text presents a more integrated approach to computer-based fatigue analysis methods. Like what was originally done, the latest technologies are applied rather than force-fitting computer computational capabilities into nineteenth-century techniques. Holistic approaches incorporating all knowledge have long been established as the most successful approach to problem-solving. Incorporating all knowledge with the most modern capabilities is the preferred approach. Holistic methods strive to reduce subjective inputs and replace them with consistent objective ones. This text aims to transition disjointed inefficient analyses into a unified computer-based holistic technique by introducing a fatigue analysis method specifically developed for computer simulations. Ultimately, for any method or theory to be valuable, it must be put into practice and prove itself. That entails leadership decision-making. Engineering design development activities will lead to final decisions. Information in a holistic approach must include the reliability of the information. How consistent are the predictions? Are the two types of potential scatter, analytic, and physical properly addressed? Is analytic scatter minimized while maintaining creativity? Is physical scatter totally understood? Effective program management requires knowledge on both types of scatter and, most importantly, the ability to realize the difference. A novel computer-based unified approach to fatigue methods is presented which incorporates a holistic approach for more accurate and consistent analyses, including the management and leadership of fatigue analysis projects, minimization of analytic scatter, management of physical scatter, and unification of methods that minimize subjective inputs often needed to bridge inconsistent techniques.
Book Synopsis Methodology for Predicting the Onset of Widespread Fatigue Damage in Lap-Splice Joints by :
Download or read book Methodology for Predicting the Onset of Widespread Fatigue Damage in Lap-Splice Joints written by and published by . This book was released on 1998 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Methods and Models for Predicting Fatigue Crack Growth Under Random Loading by :
Download or read book Methods and Models for Predicting Fatigue Crack Growth Under Random Loading written by and published by ASTM International. This book was released on with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2000 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computer-Aided Design, Manufacturing, Modeling and Simulation II by : Fang Yin Cheng
Download or read book Computer-Aided Design, Manufacturing, Modeling and Simulation II written by Fang Yin Cheng and published by Trans Tech Publications Ltd. This book was released on 2012-12-13 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings of the 2nd International Conference on Computer-Aided Design, Manufacturing, Modeling and Simulation (CDMMS 2012), held during the 21st to 23rd September 2012 in Chongqing, China, present original ideas and exciting new findings in disciplines such as CAD, CAM, Manufacturing, Mechanical Engineering, Modeling and Simulation.
Book Synopsis Advances in Fatigue and Fracture Mechanics Analyses for Metallic Aircraft Structures by : J. C. Newman (Jr)
Download or read book Advances in Fatigue and Fracture Mechanics Analyses for Metallic Aircraft Structures written by J. C. Newman (Jr) and published by . This book was released on 2000 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Expert System for Fatigue Crack Growth Predictions Based on Fatigue Crack Closure by : Ji-Ho Song
Download or read book Expert System for Fatigue Crack Growth Predictions Based on Fatigue Crack Closure written by Ji-Ho Song and published by Springer Nature. This book was released on 2022-03-04 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates fatigue crack growth under random loading graphically. This state-of-the-art monograph introduces an expert system for crack growth predictions, particularly based on crack closure. The system is developed after years of research by the authors by using the Math-type software consisting of 5 parts. This system is unique as it is fundamentally different from previous systems as it focuses on fatigue crack growth predictions based on fatigue crack closure. This book can be a useful guide for practicing engineers, researchers, and students in the fields of mechanical, aerospace, or civil engineering.
Book Synopsis Journal of Engineering Materials and Technology by :
Download or read book Journal of Engineering Materials and Technology written by and published by . This book was released on 2007 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Approach for Predicting Fatigue Crack Growth in Residual Stress Bearing Bodies by : Jihwi Kim
Download or read book Numerical Approach for Predicting Fatigue Crack Growth in Residual Stress Bearing Bodies written by Jihwi Kim and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue failure in mechanical components is one of the main concerns of the aircraft industry, so compressive residual stress is often applied to the components because it is beneficial to improve resistance to fatigue by slowing down crack growth. As a result, residual stress has been included in fatigue crack growth prediction methods. To date, residual stress was usually combined with applied loads to affect the stress intensity factor (at the current crack size) in the fatigue crack growth prediction. However, crack face contact may occur due to compressive residual stress during fatigue crack growth, and the contact effect was barely included in the prediction. Crack face contact near the crack tip under cyclic loading due to plasticity or roughness, which is called fatigue crack closure, has been studied extensively because it has a significant effect on fatigue crack growth rate (FCGR), but little research has been conducted to understand the details of crack closure due to bulk residual stress fields.This work focuses on crack closure due to compressive residual stress in an elastic material with bulk residual stress, and emphasizes that the effect of bulk residual stresses on crack closure described here is an elastic effect, which distinguishes it from the more commonly discussed forms of closure. This work describes a means to forecast crack closure due to bulk residual stress fields and assesses schemes to account for its effects on fatigue crack growth. First, contact pressure between two opposing crack faces is quantified with modeling the problem of frictionless contact. In the modeling, a weight function for a specific geometry is used and the problem is solved using quadratic mathematical programming. Second, the contact pressure is included as a form of stress intensity factor to the fatigue crack growth prediction, and the new prediction method is suggested. The new prediction method is compared to the previous methods in the literature for specific geometries (a crack on compact tension coupons and a radial crack at a hole in a strip), applied loads and residual stress fields. Additionally, in order to support this work, weight functions for cracks at a hole were newly developed.
Book Synopsis NASA Langley Scientific and Technical Information Output 2000 by :
Download or read book NASA Langley Scientific and Technical Information Output 2000 written by and published by . This book was released on 2001 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
