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Dynamic Fracture Toughness of Polymer Composites

2012
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Release : 2012
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Book Synopsis Dynamic Fracture Toughness of Polymer Composites by : Harmeet Kaur

Download or read book Dynamic Fracture Toughness of Polymer Composites written by Harmeet Kaur. This book was released on 2012. Available in PDF, EPUB and Kindle. Book excerpt: Polymer composites are engineered materials widely being used and yet not completely understood for their dynamic response. It is important to fully characterize material properties before using them for applications in critical industries, like that of defense or transport. In this project, the focus is on determining dynamic fracture toughness property of fiber reinforced polymer composites by using a combined numerical- experimental methodology. Impact tests are conducted on Split-Hopkinson pressure bar with required instrumentation to obtain load-history and initiation of crack propagation parameters followed by finite element analysis to determine desired dynamic properties. Single edge notch bend(SENB) type geometry is used for Mode-I fracture testing and similarly end-notched flexure (ENF) type of geometry is proposed to test the samples for Mode-II type of fracture. Two different linear elastic fracture mechanics approaches are used- crack opening displacement and strain energy release rates. Dynamic fracture toughness values of around 50 MPa[square root of m] and 100 MPa[square root of m] in Mode-I, whereas, around 40 MPa[square root of m] and 6 MPa[square root of m] in Mode-II are observed for carbon-epoxy and fiberglass-epoxy composites respectively. To provide a better estimate of material response, Hashin damage model is employed which takes into account non-linear behavior of composites. As observed in previous studies, values estimated using a non-linear response of composite laminates are nearly three times as high, therefore, using a linear elastic material model could underestimate a material's capacity to sustain dynamic loads without failure. It is concluded that fracture initiation toughness property is rate dependent and is higher when subjected to dynamic loads. Microscopic examination of damaged samples and a higher value of dynamic fracture toughness for fiberglass-epoxy laminates as compared to carbon-epoxy laminates suggest that dynamic fracture toughness is also a function of many other variables like mode of fracture, dominant damage criteria, manufacturing process, constituent materials and their ratios.

Impact and Dynamic Fracture of Polymers and Composites (ESIS 19)

1995 Science
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Release : 1995
Genre : Science
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Book Synopsis Impact and Dynamic Fracture of Polymers and Composites (ESIS 19) by : J. G. Williams

Download or read book Impact and Dynamic Fracture of Polymers and Composites (ESIS 19) written by J. G. Williams. This book was released on 1995. Available in PDF, EPUB and Kindle. Book excerpt: Impact and Dynamic Fracture of Polymers an Composites consist of thirty-nine reviewed and revised papers presented at the European Symposium on Impact and Dynamic Fractures of Polymers and composites held in Sardinia. The volume is divided into four sections. The first section deals with experimental methods and concepts in high-speed loading. Dynamic crack propagation is described in section 2, and rate-dependence and impact fracture toughness of plastics is dealt with in section 3. the last section is concerned with the impact damage of composites. Finally an extensive index facilitates the location of specific information for readers. This volume is the nineteenth in a series of special technical publications produced by the European Structural Integrity Society. It is an informative and original piece of work and can be thoroughly recommended to engineering designers, manufacturing engineers, and material scientists. Indeed, Impact and Dynamic Fracture of Polymers and Composites makes a significant contribution to the literature on this important subject, and will make essential reading to all those involved in this field of mechanical engineering.

Dynamic Deformation, Damage and Fracture in Composite Materials and Structures

2022-09-15 Technology & Engineering
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Release : 2022-09-15
Genre : Technology & Engineering
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Book Rating : 808/5 ( reviews)

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Book Synopsis Dynamic Deformation, Damage and Fracture in Composite Materials and Structures by : Vadim Silberschmidt

Download or read book Dynamic Deformation, Damage and Fracture in Composite Materials and Structures written by Vadim Silberschmidt. This book was released on 2022-09-15. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Deformation, Damage and Fracture in Composite Materials and Structures, Second Edition reviews various aspects of dynamic deformation, damage and fracture, mostly in composite laminates and sandwich structures, and in a broad range of application areas including aerospace, automotive, defense and sports engineering. This book examines low- and high-velocity loading and assesses shock, blast and penetrative events, and has been updated to cover important new developments such as the use of additive manufacturing to produce composites, including fiber-reinforced ones. New microstructural, experimental, theoretical, and numerical studies with advanced tools are included as well. The book also features four new chapters covering topics such as dynamic delamination, dynamic deformation and fracture in 3D-printed composites, ballistic impacts with fragmenting projectiles, and the effect of multiple impacting. - Examines dynamic deformation and fracture of composite materials, covering experimental, analytical and numerical aspects - Features four new chapters covering topics such as dynamic interfacial fracture, fracture in 3D-printed composites, ballistic impacts with fragmenting projectiles, and the effect of multiple impacting - Addresses important application areas such as aerospace, automotive, wind energy, defense and sports

Fracture and Fatigue

2016-06-15 Technology & Engineering
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Release : 2016-06-15
Genre : Technology & Engineering
Kind : eBook
Book Rating : 713/5 ( reviews)

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Book Synopsis Fracture and Fatigue by : Lawrence J. Broutman

Download or read book Fracture and Fatigue written by Lawrence J. Broutman. This book was released on 2016-06-15. Available in PDF, EPUB and Kindle. Book excerpt: Composite Materials, Volume 5: Fracture and Fatigue covers the concepts, theories, and experiments on fracture and fatigue behavior of composite materials. The book discusses the fracture of particulate composites, including metal, polymer, and ceramic matrices; relates micromechanics effects to composite strength; and summarizes the various theories relating constituent properties and microstructure to fracture. The text also describes differing theories regarding the strength and fracture of composites; and the theory and experiment relating to time-dependent fracture covering both long-term as well as dynamic fracture. The fatigue of both polymer- and metal-matrix composites and the factors influencing the toughness of both brittle and ductile matrix composites are also considered. Design engineers, materials scientist, materials engineers, and metallurgists will find the book useful.

Fracture Failure Analysis of Fiber Reinforced Polymer Matrix Composites

2021-04-19 Technology & Engineering
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Release : 2021-04-19
Genre : Technology & Engineering
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Book Rating : 420/5 ( reviews)

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Book Synopsis Fracture Failure Analysis of Fiber Reinforced Polymer Matrix Composites by : Sanjay Mavinkere Rangappa

Download or read book Fracture Failure Analysis of Fiber Reinforced Polymer Matrix Composites written by Sanjay Mavinkere Rangappa. This book was released on 2021-04-19. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a unified approach to fracture behavior of natural and synthetic fiber-reinforced polymer composites on the basis of fiber orientation, the addition of fillers, characterization, properties and applications. In addition, the book contains an extensive survey of recent improvements in the research and development of fracture analysis of FRP composites that are used to make higher fracture toughness composites in various applications.The FRP composites are an emerging area in polymer science with many structural applications. The rise in materials failure by fracture has forced scientists and researchers to develop new higher strength materials for obtaining higher fracture toughness. Therefore, further knowledge and insight into the different modes of fracture behavior of FRP composites are critical to expanding the range of their application.

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