Author: DL. Graesser
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 7
Book Description
An analysis method suitable for prediction of the residual strength of a stiffened composite panel containing a center crack is presented. The analysis is based on the superposition of anisotropic elasticity solutions for an infinite plate. Strength predictions are made for two panel configurations and compared with experimental data. Reasonable comparisons between predictions and data are obtained for a panel with relatively small tear straps and little crack tip damage growth prior to final failure. However, the model shows some unconservative predictions for a panel with relatively large tear straps and crack tip damage growth.
Damage Tolerance Predictions for Stiffened Composite Panels--Part II
Author: DL. Graesser
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 7
Book Description
An analysis method suitable for prediction of the residual strength of a stiffened composite panel containing a center crack is presented. The analysis is based on the superposition of anisotropic elasticity solutions for an infinite plate. Strength predictions are made for two panel configurations and compared with experimental data. Reasonable comparisons between predictions and data are obtained for a panel with relatively small tear straps and little crack tip damage growth prior to final failure. However, the model shows some unconservative predictions for a panel with relatively large tear straps and crack tip damage growth.
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 7
Book Description
An analysis method suitable for prediction of the residual strength of a stiffened composite panel containing a center crack is presented. The analysis is based on the superposition of anisotropic elasticity solutions for an infinite plate. Strength predictions are made for two panel configurations and compared with experimental data. Reasonable comparisons between predictions and data are obtained for a panel with relatively small tear straps and little crack tip damage growth prior to final failure. However, the model shows some unconservative predictions for a panel with relatively large tear straps and crack tip damage growth.
Damage Tolerance Predictions for Stiffened Composite Panels
Author: DL. Graesser
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 10
Book Description
An analysis method suitable for prediction of strain fields in a stiffened composite panel containing a center crack is presented. The analysis is based on the superposition of anisotropic elasticity solutions for an infinite plate. Strain field predictions are made for two panel configurations and compared with strain gage data. Reasonable comparisons between predictions and measurements are obtained. This paper lays the foundation for the predictions of the damage tolerance of stiffened composite panels that will be discussed further in a second paper.
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 10
Book Description
An analysis method suitable for prediction of strain fields in a stiffened composite panel containing a center crack is presented. The analysis is based on the superposition of anisotropic elasticity solutions for an infinite plate. Strain field predictions are made for two panel configurations and compared with strain gage data. Reasonable comparisons between predictions and measurements are obtained. This paper lays the foundation for the predictions of the damage tolerance of stiffened composite panels that will be discussed further in a second paper.
Recent Development in the Design, Testing and Impact-damage Tolerance of Stiffened Composite Panels
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
Book Description
Applied Mechanics Reviews
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 932
Book Description
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 932
Book Description
A Study of Damage Tolerance in Curved Composite Panels
Author: Brendan L. Wilder
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description
As more and more composite materials are used in modern aircraft construction, the understanding of the damage tolerance of this relatively stiff, brittle, anisotropic material becomes important to designers. This thesis investigated the behavior of a cylindrical composite panel made of AS4/3501-6 graphite/epoxy with ply orientations. Abrasion and burn surface damage was physically modeled in the panels. The panels were then tested by compressively loading them and a comparison was made to buckling predictions obtained. These tests indicated that panels which have suffered minor surface damage do not deviate significantly from buckling predictions. Composite laminates subjected to a low speed impact, such as a dropped tool or a manufacturing load, often develop an internal delamination. Since curved panels are 3-dimensional, and buckling is a non-linear phenomenon, the compressive load which will cause curved panels to become unstable is extremely hard to predict analytically. This thesis presents a technique whereby the local buckling loads at the delamination may be predicted using a 2-dimensional model with a plane strain correction.
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description
As more and more composite materials are used in modern aircraft construction, the understanding of the damage tolerance of this relatively stiff, brittle, anisotropic material becomes important to designers. This thesis investigated the behavior of a cylindrical composite panel made of AS4/3501-6 graphite/epoxy with ply orientations. Abrasion and burn surface damage was physically modeled in the panels. The panels were then tested by compressively loading them and a comparison was made to buckling predictions obtained. These tests indicated that panels which have suffered minor surface damage do not deviate significantly from buckling predictions. Composite laminates subjected to a low speed impact, such as a dropped tool or a manufacturing load, often develop an internal delamination. Since curved panels are 3-dimensional, and buckling is a non-linear phenomenon, the compressive load which will cause curved panels to become unstable is extremely hard to predict analytically. This thesis presents a technique whereby the local buckling loads at the delamination may be predicted using a 2-dimensional model with a plane strain correction.
A Progressive Damage Methodology for Residual Strength Predictions of Notched Composite Panels
Author: Timothy W. Coats
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
Book Description
Advanced Durability and Damage Tolerance Design and Analysis Methods for Composite Structures: Lessons Learned from NASA Technology Development Programs
Author: Charles E. Harris
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 42
Book Description
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 42
Book Description
Delamination Behaviour of Composites
Author: Srinivasan Sridharan
Publisher: Elsevier
ISBN: 1845694821
Category : Technology & Engineering
Languages : en
Pages : 787
Book Description
Given such advantages as low weight compared to strength and toughness, laminated composites are now used in a wide range of applications. Their increasing use has underlined the need to understand their principal mode of failure, delamination. This important book reviews key research in understanding and preventing delamination.The first part of the book reviews general issues such as the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance. Part two describes techniques for detecting and characterising delamination such as piezoelectric sensors, the use of lamb waves and acoustic emission techniques. The next two sections of the book discuss ways of studying and modelling delamination behaviour. The final part of the book reviews research on delamination behaviour in particular conditions such as shell and sandwich structures, z-pin bridging and resin bonding.With its distinguished editor and international team of contributors, Delamination behaviour of composites is a standard reference for all those researching laminated composites and using them in such diverse applications as microelectronics, aerospace, marine, automotive and civil engineering. - Reviews the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance - Discuss ways of studying and modelling delamination behaviour - A standard reference for all those researching laminated composites
Publisher: Elsevier
ISBN: 1845694821
Category : Technology & Engineering
Languages : en
Pages : 787
Book Description
Given such advantages as low weight compared to strength and toughness, laminated composites are now used in a wide range of applications. Their increasing use has underlined the need to understand their principal mode of failure, delamination. This important book reviews key research in understanding and preventing delamination.The first part of the book reviews general issues such as the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance. Part two describes techniques for detecting and characterising delamination such as piezoelectric sensors, the use of lamb waves and acoustic emission techniques. The next two sections of the book discuss ways of studying and modelling delamination behaviour. The final part of the book reviews research on delamination behaviour in particular conditions such as shell and sandwich structures, z-pin bridging and resin bonding.With its distinguished editor and international team of contributors, Delamination behaviour of composites is a standard reference for all those researching laminated composites and using them in such diverse applications as microelectronics, aerospace, marine, automotive and civil engineering. - Reviews the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance - Discuss ways of studying and modelling delamination behaviour - A standard reference for all those researching laminated composites
Damage Assessment of Structures X
Author: Biswajit Basu
Publisher: Trans Tech Publications Ltd
ISBN: 3038261777
Category : Technology & Engineering
Languages : en
Pages : 1330
Book Description
Damage assessment of structures is an emerging field and has become increasingly important over the past decade or two. Diagnosis and prognosis of structural damage plays an important role not just in ensuring the structural integrity but also in optimizing the overall life cycle cost including the cost for operation and maintenance. Volume is indexed by Thomson Reuters CPCI-S (WoS). The Special collection consists of a compilation 159 papers on all research topics relevant to damage assessment of engineering structures and systems including numerical simulations, signal processing of sensor measurements, theoretical and experimental studies. Broad areas of damage assessment covered in the publication include applications to composite materials, civil infrastructure, mechanical devices and machineries, renewable energy, sensors, signal processing, structural health and condition monitoring.
Publisher: Trans Tech Publications Ltd
ISBN: 3038261777
Category : Technology & Engineering
Languages : en
Pages : 1330
Book Description
Damage assessment of structures is an emerging field and has become increasingly important over the past decade or two. Diagnosis and prognosis of structural damage plays an important role not just in ensuring the structural integrity but also in optimizing the overall life cycle cost including the cost for operation and maintenance. Volume is indexed by Thomson Reuters CPCI-S (WoS). The Special collection consists of a compilation 159 papers on all research topics relevant to damage assessment of engineering structures and systems including numerical simulations, signal processing of sensor measurements, theoretical and experimental studies. Broad areas of damage assessment covered in the publication include applications to composite materials, civil infrastructure, mechanical devices and machineries, renewable energy, sensors, signal processing, structural health and condition monitoring.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 602
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 602
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.