Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures

Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures PDF Author: Hugh L. McManus
Publisher:
ISBN:
Category : Polymeric composites
Languages : en
Pages : 32

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Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures

Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures PDF Author: Hugh L. McManus
Publisher:
ISBN:
Category : Polymeric composites
Languages : en
Pages : 32

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Book Description


Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures

Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722804831
Category :
Languages : en
Pages : 32

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Book Description
This report describes analytical methods for calculating stresses and damage caused by degradation of the matrix constituent in polymer matrix composite materials. Laminate geometry, material properties, and matrix degradation states are specified as functions of position and time. Matrix shrinkage and property changes are modeled as functions of the degradation states. The model is incorporated into an existing composite mechanics computer code. Stresses, strains, and deformations at the laminate, ply, and micro levels are calculated, and from these calculations it is determined if there is failure of any kind. The rationale for the model (based on published experimental work) is presented, its integration into the laminate analysis code is outlined, and example results are given, with comparisons to existing material and structural data. The mechanisms behind the changes in properties and in surface cracking during long-term aging of polyimide matrix composites are clarified. High-temperature-material test methods are also evaluated. McManus, Hugh L. and Chamis, Christos C. Glenn Research Center RTOP 505-62-10...

Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures

Stress and Damage in Polymer Matrix Composite Materials Due to Material Degradation at High Temperatures PDF Author: Hugh L. N. McManus
Publisher:
ISBN:
Category :
Languages : en
Pages : 26

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Book Description
Analytical methods are described for calculating stresses and damage in polymer matrix composite materials caused by degradation of the matrix constituent. Laminate geometry, material properties, and matrix degradation state as functions of position and time are specified. A model of matrix shrinkage and property changes as functions of the degradation state is used. The model has been incorporated into an existing composite mechanics computer code. Stresses, strains, and deformations at the laminate, ply, and micro levels are calculated, and it is determined if failure of any kind occurs. The rational for the model, based on published experimental work, is presented, its integration into the laminate analysis code outlined, and example results given, with comparisons to existing material and structural data. The mechanisms behind the changes in properties and surface cracking observed during long-term aging of polyimide matrix composites are clarified, and high temperature material test methods are evaluated.

Environmental Degradation of Industrial Composites

Environmental Degradation of Industrial Composites PDF Author: Celine A Mahieux
Publisher: Elsevier
ISBN: 0080531059
Category : Technology & Engineering
Languages : en
Pages : 323

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Book Description
Thanks to their low density and tailored properties, polymer matrix composites are attractive candidates for a large number of industrial applications ranging from aerospace to transportation and energy. However, the behaviour of polymer-based materials is strongly affected by a number of environmental factors. Environmental Degradation in Industrial Composites provides vital information on the effects of environmental factors such as temperature, liquid and gas exposure, electrical fields and radiations, and how micro- and micromechanical calculations during design and manufacture must take these effects into account. The book concludes with reviews on standard and specific testing methods for the various environmental factors and their combinations, helping mechanical/materials engineers and specifiers to predict possible changes due to environmental conditions. Each chapter is supplemented by industrial case studies to help in the understanding of degradation of composites in real life situations.This book will help you to...* Understand how environmental factors lead to degradation effects in polymer matrix composite structures* Build these factors into calculations when predicting the part performance and lifetime of structures* Compare real-life situations from case studies with your predicted results* Predict probable composite behaviour with greater accuracy This book will help you to...* Understand how environmental factors lead to degradation effects in polymer matrix composite structures* Build these factors into calculations when predicting the part performance and lifetime of structures* Compare real-life situations from case studies with your predicted results* Predict probable composite behaviour with greater accuracy

Fibrous Polymeric Composites

Fibrous Polymeric Composites PDF Author: Bankim Chandra Ray
Publisher: CRC Press
ISBN: 0429013957
Category : Technology & Engineering
Languages : en
Pages : 208

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Book Description
This book emphasizes the scientific origin of deformation and damage of FRP composites under various environmental effects and analyses present understanding on degradation mechanisms, role of interfaces and addition of nanofillers Discusses micro-characterization of composites and interfaces, also includes micro-mechanisms and microscopic evidences to establish the structure-property correlation Elucidates advantages and limitations of FRP composites in supercritical applications

High Temperature and Environmental Effects on Polymeric Composites

High Temperature and Environmental Effects on Polymeric Composites PDF Author: Thomas S. Gates
Publisher: ASTM International
ISBN: 9780803124240
Category : Technology & Engineering
Languages : en
Pages : 276

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Book Description


Progress in Durability Analysis of Composite Systems

Progress in Durability Analysis of Composite Systems PDF Author: K.L. Reifsnider
Publisher: CRC Press
ISBN: 9789054109600
Category : Technology & Engineering
Languages : en
Pages : 380

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Book Description
Composite material systems are the basis for much of the natural world around us and are rapidly becoming the basis for many modern engineering components. A controlling feature for the general use of such systems is their damage tolerance, durability and reliability. The present book is a comprehensive cross section of the state of the art in the field of the durability of polymer-based, composite, and adhesive systems. As such, it is of special value to researchers concerned with the frontier of the field, to students concerned with the substance of the subject, and to the applied community concerned with the finding methodologies that make it possible to design safe and durable engineering components using material systems.

Thermal and Mechanical Analysis of Polymer Matrix Composite Materials Exposed to a Concentrated Heat Source for a Short Duration

Thermal and Mechanical Analysis of Polymer Matrix Composite Materials Exposed to a Concentrated Heat Source for a Short Duration PDF Author: Charlotte Corlay
Publisher:
ISBN: 9781109794144
Category :
Languages : en
Pages : 236

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Book Description
Thus, for given boundary conditions of a composite material exposed to a concentrated heat source for a short duration, the degradation of the material can be estimated in terms of mechanical property changes, from the predicted thermal history of the exposed sample.

Creep and Fatigue in Polymer Matrix Composites

Creep and Fatigue in Polymer Matrix Composites PDF Author: Rui Miranda Guedes
Publisher: Woodhead Publishing
ISBN: 0081026021
Category : Technology & Engineering
Languages : en
Pages : 586

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Book Description
Creep and Fatigue in Polymer Matrix Composites, Second Edition, updates the latest research in modeling and predicting creep and fatigue in polymer matrix composites. The first part of the book reviews the modeling of viscoelastic and viscoplastic behavior as a way of predicting performance and service life. Final sections discuss techniques for modeling creep rupture and failure and how to test and predict long-term creep and fatigue in polymer matrix composites. Reviews the latest research in modeling and predicting creep and fatigue in polymer matrix composites Puts a specific focus on viscoelastic and viscoplastic modeling Features the time-temperature-age superposition principle for predicting long-term response Examines the creep rupture and damage interaction, with a particular focus on time-dependent failure criteria for the lifetime prediction of polymer matrix composite structures that are illustrated using experimental cases

Fatigue of Composite Materials

Fatigue of Composite Materials PDF Author: K.L. Reifsnider
Publisher: Elsevier
ISBN: 0444597182
Category : Technology & Engineering
Languages : en
Pages : 532

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Book Description
This book provides the first comprehensive review of its kind on the long-term behaviour of composite materials and structures subjected to time variable mechanical, thermal, and chemical influences, a subject of critical importance to the design, development, and certification of high performance engineering structures. Specific topics examined include damage, damage characterization, and damage mechanics; fatigue testing and evaluation; fatigue behaviour of short and long fibre reinforced polymer and metal matrix materials; viscoelastic and moisture effects; delamination; statistical considerations; the modeling of cumulative damage development; and life prediction. The volume provides an extensive presentation of data, discussions, and comparisons on the behaviour of the major types of material systems in current use, as well as extensive analysis and modeling (including the first presentation of work not found elsewhere). The book will be of special interest to engineers concerned with reliability, maintainability, safety, certification, and damage tolerance; to materials developers concerned with making materials for long-term service, especially under severe loads and environments, and to lecturers, students, and researchers involved in material system design, performance, solid mechanics, fatigue, durability, and composite materials. The scope of the work extends from entry level material to the frontiers of the subject.