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The book is targeted at engineers, university lecturers,
postgraduates, and final year undergraduate students involved in
computational modelling and experimental and theoretical analysis
of the high-temperature behavior of engineering structures. It will
also be of interest to researchers developing the thermal strength
theory as a branch of continuum mechanics. Thermal integrity is a
multidisciplinary field combining the expertise of mechanical
engineers, material scientists and applied mathematicians, each
approaching the problem from their specific viewpoint. This
monograph draws on the research of a broad scientific community
including the author's contribution. The scope of thermal strength
analysis was considerably extended thanks to modern computers and
the implementation of FEM codes. However, the author believes that
some material models adopted in the advanced high-performance
software, are not sufficiently justificated due to lack of
easy-to-follow books on the theoretical and experimental aspects of
thermal integrity. The author endeavors to provide a thorough yet
sufficiently simple presentation of the underlying concepts, making
the book compelling to a wide audience.
The book is targeted at engineers, university lecturers,
postgraduates, and final year undergraduate students involved in
computational modelling and experimental and theoretical analysis
of the high-temperature behavior of engineering structures. It will
also be of interest to researchers developing the thermal strength
theory as a branch of continuum mechanics. Thermal integrity is a
multidisciplinary field combining the expertise of mechanical
engineers, material scientists and applied mathematicians, each
approaching the problem from their specific viewpoint. This
monograph draws on the research of a broad scientific community
including the author's contribution. The scope of thermal strength
analysis was considerably extended thanks to modern computers and
the implementation of FEM codes. However, the author believes that
some material models adopted in the advanced high-performance
software, are not sufficiently justificated due to lack of
easy-to-follow books on the theoretical and experimental aspects of
thermal integrity. The author endeavors to provide a thorough yet
sufficiently simple presentation of the underlying concepts, making
the book compelling to a wide audience.
Computational mechanics, as a science employed for the numerical
model ing of processes in nature and engineering, has over the last
few decades developed two strands. The first concerns the putting
of more and more powerful software packages into computational
practice, using increas ingly high-performance computers with
increasingly large memory. The traditional finite element and
finite difference approaches are still preva lent. Over the years
however, researchers have met with new problems; their solutions on
the basis of traditional methods are at best difficult and at worst
impossible to obtain. Such problems provided a powerful impetus in
the development of the second strand, resulting in the development
of es sentially new approaches for numerical modeling, for example
meshless methods, "molecular" dynamics, neuron networks. The
current state of the art formed the basis of many papers presented
at the Fifth World Congress on Computational Mechanics, Vienna
2002. It is within the framework of the second strand that this
book has been written."
This monograph presents in detail the novel "wave" approach to finite element modeling of transient processes in solids. Strong discontinuities of stress, deformation, and velocity wave fronts as well as a finite magnitude of wave propagation speed over elements are considered. These phenomena, such as explosions, shocks, and seismic waves, involve problems with a time scale near the wave propagation time. Software packages for 1D and 2D problems yield significantly better results than classical FEA, so some FORTRAN programs with the necessary comments are given in the appendix. The book is written for researchers, lecturers, and advanced students interested in problems of numerical modeling of non-stationary dynamic processes in deformable bodies and continua, and also for engineers and researchers involved designing machines and structures, in which shock, vibro-impact, and other unsteady dynamics and waves processes play a significant role.
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