Xem 1-17 trên 17 kết quả Elastic bodies
  • The scope of the series covers the entire spectrum of solid mechanics. Thus it includes the foundation of mechanics; variational formulations; computational mechanics; statics, kinematics and dynamics of rigid and elastic bodies; vibrations of solids and structures; dynamical systems and chaos; the theories of elasticity, plasticity and viscoelasticity; composite materials; rods, beams, shells and membranes; structural control and stability; soils, rocks and geomechanics; fracture; tribology; experimental mechanics; biomechanics and machine design.

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  • n view of the growing importance of product liability and the demand for fulfillment of extreme specifications for new products, this book provides the basic tools for establishing model equations in structural mechanics. Additionally, it illustrates the transition and interrelation between structural mechanics and structural optimization. Nowadays, this new direction is extremely important for more efficiency in the design process. The book is divided into four parts covering the fundamentals of elasticity, plane and curved load-bearing structures and structural optimization.

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  • It is well known that no surface, natural or manufactured, is perfectly smooth. Nonetheless the idealized case of elastic bodies with smooth surfaces is considered in this chapter as the theoretical reference for the contact between rough surfaces. The latter will be discussed in Chapter 4 and used as the basis for evaluating the frictional resistance.

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  • No matter what stresses are imposed on an elastic body, provided the material does not rupture, displacement at any point can have only one value. Therefore the displacement at any point can be completely given by the three single valued components u, v and w along the three co-ordinate axes x, y and z respectively. The normal and shear strains may be derived in terms of these displacements.

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  • Aims and Scope of the Series The fundamental questions arising in mechanics are: Why?, How?, and How much? The aim of this series is to provide lucid accounts written by authoritative researchers giving vision and insight in answering these questions on the subject of mechanics as it relates to solids. The scope of the series covers the entire spectrum of solid mechanics.

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  • The term engineering rock mechanics is used to describe the engineering application of rock mechanics to civil, mining, petroleum and environmental engineering circumstances. The term mechanics, means the study of the equilibrium and motion of bodies, which includes statics and dynamics l. Thus, rock mechanics is the study of mechanics applied to rock and rock masses. ’Engineering rock mechanics’ is this study within an engineering context, rather than in the context of natural processes that occur in the Earth‘s crust, such as folding and faulting.

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  • Vibrations occur all around us: in the human body, in mechanical systems and sensors, in buildings and structures, and in vehicles used in the air, on the ground, and in the water. In some cases, these vibrations are undesirable and attempts are made to avoid them or to minimize them; in other cases, vibrations are controlled and put to beneficial uses. Until recently, many of the application areas of vibrations have been largely concerned with objects having one or more of its dimensions being tens of centimeters and larger, a size that we shall denote as the macro scale.

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  • The technology-based Effluent Guidelines could not guarantee achievement of adequate water quality in all receiving waters, so permit writers were required to set even more stringent “water-quality-limited” standards for plants discharging into such water bodies. These standards necessarily depended on the current conditions of the receiving water body and its capacity to absorb waste. Also, the effluent limitations for any firm affected and were affected by the effluent limitations on all other firms. The front-line administration of this program—i.e.

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  • A large body of research over several decades has grappled with how and whether fear can persuade consumers to change their health behaviors. Different models have been proposed to describe the cognitive and emotional processes involved.

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  • A robust body of literature details reproductive effects in fish, amphibians, and reptiles related to exposure to endocrine disruptors. Evidence of these effects has also been seen in wild mammals such as polar bears and seals. Environmental exposure assessments and wildlife, laboratory and epidemiologic studies show exposure to low-level environmental contaminants, such as pesticides and other chemicals, subtly undermines the ability to reproduce.

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  • At the same time the education sector had been developing its own sophisticated view of learning and teaching. For example a large body of evidence about how young people learn, curriculum theories and models, teaching approaches and styles, school leadership and management, have all shaped how the education sector thinks and acts about the purposes of school education. The competencies schools aim for, seek to empower young people with abilities to enter the adult world and also to have skills about, and insight into their own learning needs.

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  • Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials. It uses methods of analytical solid mechanics to calculate the driving force on a crack and those of experimental solid mechanics to characterize the material's resistance to fracture.In modern materials science, fracture mechanics is an important tool in improving the mechanical performance of materials and components.

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  • SYMBOLSANDUNITS A AB Ar AS Cross-sectional area, in2 (mm2) Cross-sectional area of the body of a bolt, in2 (mm2) Cross-sectional area of the body of the rivet, in2 (mm2) Cross-sectional area of the tensile stress area of the threaded portion of a bolt, in2 (mm2) A19 A2, A3, etc. Cross-sectional areas of individual fasteners, in2 (mm2) b Number of shear planes which pass through the fastener; and/or the number of slip surfaces in a shear joint d Nominal diameter of the bolt, in (mm) E Modulus of elasticity, psi...

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  • Solid mechanics, which includes the theories of elasticity and plasticity, is a broad discipline, with experimental, theoretical, and computational aspects, and with a twofold aim: on the one hand, it seeks to describe the mechanical behavior of solids under conditions as general as possible, regardless of shape, interaction with other bodies, field of application, or the like; on the other hand, it attempts to provide solutions to specific problems involving stressed solid bodies that arise in civil and mechanical engineering, geophysics, physiology, and other applied disciplines.

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  • This configuration enables the rubber to be loaded in both shear and compression with the majority of engine rotational flexibility being carried out in shear. Vertical deflection due to body pitch when accelerating or braking is absorbed mostly in compression. Vertical elastic stiffness may be increased without greatly effecting engine roll flexibility by having metal spacer interleafs bonded into the rubber. Double inclined wedge with longitudinal control mounting (Fig. 1.

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  • A vehicle on elastic suspensions may be modelled as a system made by a certain number of rigid bodies connected with each other by mechanisms of various kinds and by a set of massless springs and dampers simulating the suspensions. A vehicle with four wheels can be modelled as a system with 10 degrees of freedom, six for the body and one for each wheel. This holds for any type of suspension, if the motion of the wheels due to the compliance of the system constraining the motion of the suspensions (longitudinal and transversal compliance of the suspensions) is neglected....

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  • Low-frequency acoustic energy released within the Earth's crust and mantle mostly propagates - depending on the density and elasticity of the medium - through several types of seismic waves categorized as body waves (longitudinal P and transverse S) or surface waves (long L and ground roll R). The importance of seismic wave research lies not only in our ability to understand and predict earthquakes and tsunamis, it also reveals information on the Earth's composition and features in much the same way as it led to the discovery of Mohorovicic's discontinuity....

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