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Author: Peter A. Zinoviev Publisher: Routledge ISBN: 1351451375 Category : Science Languages : en Pages : 262
Book Description
All real materials in one way or another, exhibit a departure from ideal elastic behaviour, even at very small strain values. Under cyclic deformation, these departtures result in irreversible energy losses in material. The causes of such losses are many, and include the irreversible transfer of mechanical energy into heat, growth of cracks and other defects, and the microplastic deformaton of crystals to name a few. Several terms have been suggested to define these phenomena including damping, energy dissipation, imperfect elasticity and internal friction. This book is about materials damping; with damping or energy dissipation processes in vibrating solids.
Author: Peter A. Zinoviev Publisher: Routledge ISBN: 1351451375 Category : Science Languages : en Pages : 262
Book Description
All real materials in one way or another, exhibit a departure from ideal elastic behaviour, even at very small strain values. Under cyclic deformation, these departtures result in irreversible energy losses in material. The causes of such losses are many, and include the irreversible transfer of mechanical energy into heat, growth of cracks and other defects, and the microplastic deformaton of crystals to name a few. Several terms have been suggested to define these phenomena including damping, energy dissipation, imperfect elasticity and internal friction. This book is about materials damping; with damping or energy dissipation processes in vibrating solids.
Author: AK. Bledzki Publisher: ISBN: Category : Composites Languages : en Pages : 5
Book Description
This paper presents a method for the estimation of the vibratory fatigue strength of composite materials that is based on the accumulated dissipated energy. The accumulated dissipated energy was measured with a special measuring technique, which is able to catch quasi-continuously the mechanical properties of the tested samples. The curves of the accumulated dissipated energy were approximated with an equation that includes several parameters. These parameters were identified for experiments with different types of load and for samples with different contents of micropores. For samples that reach more than 106 load cycles, the accumulated dissipated energy in one-load-stage tests is a linear function. With this, the fatigue limit of the samples can be predicted.
Author: Peter A. Zinoviev Publisher: Routledge ISBN: 1351451367 Category : Science Languages : en Pages : 147
Book Description
All real materials in one way or another, exhibit a departure from ideal elastic behaviour, even at very small strain values. Under cyclic deformation, these departtures result in irreversible energy losses in material. The causes of such losses are many, and include the irreversible transfer of mechanical energy into heat, growth of cracks and other defects, and the microplastic deformaton of crystals to name a few. Several terms have been suggested to define these phenomena including damping, energy dissipation, imperfect elasticity and internal friction. This book is about materials damping; with damping or energy dissipation processes in vibrating solids.
Author: It Meng Low Publisher: Elsevier ISBN: 0128208791 Category : Technology & Engineering Languages : en Pages : 690
Book Description
Composite materials have been well developed to meet the challenges of high-performing material properties targeting engineering and structural applications. The ability of composite materials to absorb stresses and dissipate strain energy is vastly superior to that of other materials such as polymers and ceramics, and thus they offer engineers many mechanical, thermal, chemical and damage-tolerance advantages with limited drawbacks such as brittleness. Composite Materials: Manufacturing, Properties and Applications presents a comprehensive review of current status and future directions, latest technologies and innovative work, challenges and opportunities for composite materials. The chapters present latest advances and comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites. The book targets researchers in the field of advanced composite materials and ceramics, students of materials science and engineering at the postgraduate level, as well as material engineers and scientists working in industrial R& D sectors for composite material manufacturing. Comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites Features latest advances in terms of mechanical properties and other material parameters which are essential for designers and engineers in the composite and composite reinforcement manufacturing industry, as well as all those with an academic research interest in the subject Offers a good platform for end users to refer to the latest technologies and topics fitting into specific applications and specific methods to tackle manufacturing or material processing issues in relation to different types of composite materials
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Various damages, which develop in structural composites, cause a softening behavior which can cause significant load redistribution in non-critical as well as critical areas of various structural elements. The strain energy dissipation (SED) concept provides a set of consistent nonlinear constitutive relations for stress analyses and the in-plane loader (IPL) provides a way for material characterization. Damage surfaces for moderate values of dissipated energy densities (DED) were estimated to match the response of conventional (+/-theta) sub ns coupon tests, which are influenced by matrix mode damages. Softening behaviors for high values of DED which can result from fiber breakage/pull out were estimated using engineering judgement. Nonlinear finite element analyses were performed for two classes of structural elements; namely. (i) a (+/- theta) sub ns cylindrical pressure vessel, where the nonlinearities in load- deformation responses are noticeable before fiber failure. and (ii) open hole tension of two quasi-isotropic layups, where local failure and softening in the fiber direction become critical to cause catastrophic failure. The results show the usefulness of the approach for design purposes and for explaining the complex problem of the so called "hole size" effect. Extension of the SED concept to the 3-D problem is suggested and a new approach to the problem of certification is discussed. Usefulness of the data generated by the IPL could not be assessed since they were not available for use. However, it appears that such data would be useful if they can provide full information up to high DED levels required for complete softening due to fiber breakage and pull out. Additional studies are suggested for the following phases for utilizing the full potential of the approach. Use of the test devices (IPL) and/or other tests by other testing organizations are also recommended to determine their acceptability and versatility
Author: Publisher: ISBN: Category : Languages : en Pages : 76
Book Description
An approach to characterizing failure behavior and degree of load induced internal damage in composite materials and structures is formulated. This approach is based on a systematic experimental procedure to observe response of composite materials subjected to multiaxial load environment. The energy dissipated by internal failure mechanisms is employed as a measure of internal damage and is characterized by an energy dissipation function, which is identified by means of a deconvolution procedure data provided by NRL's automated in-plane loader. Use of this information as a failure analysis and prediction tool is demonstrated by simulating the structural response of some naval structural components made from several different composite materials. In addition, a general theory for the derivation of the constitutive behavior of the damaged composites is presented.
Author: Rikard Benton Heslehurst Publisher: CRC Press ISBN: 146658047X Category : Technology & Engineering Languages : en Pages : 216
Book Description
The advantages of composite materials include a high specific strength and stiffness, formability, and a comparative resistance to fatigue cracking and corrosion. However, not forsaking these advantages, composite materials are prone to a wide range of defects and damage that can significantly reduce the residual strength and stiffness of a structure or result in unfavorable load paths. Emphasizing defect identification and restitution, Defects and Damage in Composite Materials and Structures explains how defects and damage in composite materials and structures impact composite component performance. Providing ready access to an extensive, descriptive list of defects and damage types, this must-have reference: Examines defect criticality in composite structures Recommends repair actions to restore structural integrity Discusses failure modes and mechanisms of composites due to defects Reviews NDI processes for finding and identifying defects in composite materials Relating defect detection methods to defect type, the author merges his experience in the field of in-service activities for composite airframe maintenance and repair with indispensable reports and articles on defects and damage in advanced composite materials from the last 50 years.
Author: John B. Wachtman Publisher: John Wiley & Sons ISBN: 0470316225 Category : Technology & Engineering Languages : en Pages : 539
Book Description
This volume is part of the Ceramic Engineering and Science Proceeding (CESP) series. This series contains a collection of papers dealing with issues in both traditional ceramics (i.e., glass, whitewares, refractories, and porcelain enamel) and advanced ceramics. Topics covered in the area of advanced ceramic include bioceramics, nanomaterials, composites, solid oxide fuel cells, mechanical properties and structural design, advanced ceramic coatings, ceramic armor, porous ceramics, and more.
Author: Peter A. Zinoviev
Author: Peter A. Zinoviev
Author: AK. Bledzki
Author: Peter A. Zinoviev
Author: It Meng Low
Author: Hansong Huang
Author: 
Author: 
Author: Rikard Benton Heslehurst
Author: M. W. Yuan
Author: John B. Wachtman