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Author: Paul A. Lagace Publisher: ISBN: Category : Languages : en Pages : 26
Book Description
Ongoing research into interlaminar stresses and delamination failure in laminated composites has pointed out the lack of a practical and reliable method for measuring the through-the-thickness strength of composite materials, a necessary parameter in any strength-of-materials approach for prediction of delamination initiation and growth. In this work, a specimen has been developed which allows 13.4-mm-thick laminates to be tested to failure in pure [sigma]zz (out-of-plane tension, or "flatwise loading"). This is achieved by bonding aluminum loading bars to a composite specimen tapered through its thickness. This specimen allows direct measurement of the through-the-thickness strength of such laminates. This specimen was used to measure both the transverse and through-the-thickness strength of AS4/3501-6 graphite/epoxy. The transverse strength of 57.6 MPa obtained showed good correlation with that measured with standard coupons, giving confidence in the specimen design. The measured through-the-thickness strength was 43.0 MPa. The through-the-thickness strength appeared to be independent of layup, as unidirectional and cross-ply laminates yielded only negligibly different results. Suggestions are also given as to how the specimen can be improved to facilitate manufacture and testing.
Author: Paul A. Lagace Publisher: ISBN: Category : Languages : en Pages : 26
Book Description
Ongoing research into interlaminar stresses and delamination failure in laminated composites has pointed out the lack of a practical and reliable method for measuring the through-the-thickness strength of composite materials, a necessary parameter in any strength-of-materials approach for prediction of delamination initiation and growth. In this work, a specimen has been developed which allows 13.4-mm-thick laminates to be tested to failure in pure [sigma]zz (out-of-plane tension, or "flatwise loading"). This is achieved by bonding aluminum loading bars to a composite specimen tapered through its thickness. This specimen allows direct measurement of the through-the-thickness strength of such laminates. This specimen was used to measure both the transverse and through-the-thickness strength of AS4/3501-6 graphite/epoxy. The transverse strength of 57.6 MPa obtained showed good correlation with that measured with standard coupons, giving confidence in the specimen design. The measured through-the-thickness strength was 43.0 MPa. The through-the-thickness strength appeared to be independent of layup, as unidirectional and cross-ply laminates yielded only negligibly different results. Suggestions are also given as to how the specimen can be improved to facilitate manufacture and testing.
Author: PA. Lagace Publisher: ISBN: Category : Composites Languages : en Pages : 11
Book Description
Ongoing research into interlaminar stresses and delamination failure in laminated composites has pointed out the lack of a practical and reliable method for measuring the through-the-thickness strength of composite materials, a necessary parameter in any strength-of-materials approach for prediction of delamination initiation and growth. In this work, a specimen has been developed that allows 13.4-mm-thick laminates to be tested to failure in pure ?zz (out-of-plane tension, or "flatwise loading"). This is achieved by bonding aluminum loading bars to a composite specimen tapered through its thickness. This specimen allows direct measurement of the through-the-thickness strength of such laminates. This specimen was used to measure both the transverse and through-the-thickness strength of AS4/3501-6 graphite/epoxy. The transverse strength of 57.6 MPa obtained showed good correlation with that measured with standard coupons, giving confidence in the specimen design. The measured through-the-thickness strength was 43.0 MPa. The through-the-thickness strength appeared to be independent of layup, as unidirectional and cross-ply laminates yielded only negligibly different results. Suggestions are also given as to how the specimen can be improved to facilitate manufacture and testing.
Author: Christos C. Chamis Publisher: ASTM International ISBN: 0803111967 Category : Composite materials Languages : en Pages : 295
Book Description
Annotation Proceedings of a symposium on [title] held in Phoenix, AZ, Nov. 1986. Data and test methods on: extreme/hostile environments, design allowables, property/behavior specific testing. Annotation copyrighted by Book News, Inc., Portland, OR.
Author: J M Hodgkinson Publisher: Elsevier ISBN: 1855738910 Category : Technology & Engineering Languages : en Pages : 379
Book Description
Testing of composite materials can present complex problems but is essential in order to ensure the reliable, safe and cost-effective performance of any engineering structure. This essentially practical book, complied from the contributions of leading professionals in the field, describes a wide range of test methods which can be applied to various types of advanced fibre composites. The book focuses on high modulus, high strength fibre/plastic composites and also covers highly anisotrpoic materials such as carbon, aramid and glass.Engineers and designers specifying the use of materials in structures will find this book an invaluable guide to best practice throughout the range of industrial sectors where FRCs are employed.
Author: M. Hinton Publisher: Elsevier ISBN: 9780080444758 Category : Science Languages : en Pages : 1276
Book Description
Fiber reinforced polymer composites are an extremely broad and versatile class of material.Their high strength coupled with lightweight leads to their use wherever structural efficiency is at a premium. Applications can be found in aircraft, process plants, sporting goods and military equipment. However they are heterogeneous in construction and antisotropic, which makes making strength prediction extremely difficult especially compared to that of a metal. This book brings together the results of a 12year worldwide failure exercise encompassing 19 theories in a single volume. Each contributor describes their own theory and employs it to solve 14 challenging problems. The accuracy of predictions and the performance of the theories are assessed and recommendations made on the uses of the theories in engineering design. All the necessary information is provided for the methodology to be readily employed for validating and benchmarking new theories as they emerge. Brings together 19 failure theories, with many application examples. Compares the leading failure theories with one another and with experimental data Failure to apply these theories could result in potentially unsafe designs or over design.
Author: Leif A. Carlsson Publisher: CRC Press ISBN: 1439848599 Category : Technology & Engineering Languages : en Pages : 366
Book Description
Over the last three decades, the evolution of techniques for the experimental testing of composite materials has struggled to keep up with the advances and broadening areas of application of the composite materials themselves. In recent years, however, much work has been done to consolidate and better understand the test methods being used. Finally
Author: Abdul-Hamid Zureick Publisher: ASTM International ISBN: 0803128932 Category : Carbon fibers Languages : en Pages : 278
Book Description
From a March 2001 symposium in Phoenix, Arizona, 17 papers consider such topics as tabbed versus untabbed fiber-reinforced composite compression, qualification using a nested experimental design, determining and characterizing imperfections in composite pressure vessels, philosophies for assessing t
Author: Paul A. Lagace
Author: Paul A. Lagace
Author: PA. Lagace
Author: Christos C. Chamis
Author: J M Hodgkinson
Author: M. Hinton
Author: Leif A. Carlsson
Author: Ravi B. Deo
Author: Wade C. Jackson
Author: C. T. Sun
Author: Abdul-Hamid Zureick