The current paper establishes an axisymmetric model for an inductive heating process. Therein, the fully coupled MAXWELL equations, assuming a temperature dependent permeability, are combined with the non-linear heat conduction equation to yield a monolithic solution strategy. The latter is based on a consistent linearization together with a higher order finite element discretization using GALERKIN'S method in space. For the temporal discretization, the generalized Newmark-? methods, higher order RUNGE-KUTTA methods, and discontinuous and continuous GALERKIN methods are used. Furthermore, the residual error is introduced to open an alternative way to obtain a numerically efficient estimation of the time integration accuracy. Simulation results of the electric, magnetic and thermal fields are provided, together with parameter studies concerning spatial discretization, frequency dependence and penetration depth of the heating zone. Another topic analyzed is the residual error and its estimation quality regarding polynomial degree and time step size. A further aspect of this work is the investigation of the thermal fluid-structure interaction with respect to functionally graded materials. Different coupling strategies for the acceleration of the fixed-point iteration in each time step is in the foreground. Relaxation methods as well as extrapolation methods make it possible to significantly reduce the number of fixed point iterations. At the same time, an adaptive strategy with higher order RUNGE-KUTTA methods can provide a further advantage in combination with acceleration methods.

The present thesis investigates the usage of higher order accurate time integrators together with appropriate error estimators for small and finite dynamic (visco)plasticity. Therefore, a general (visco)plastic problem is defined which serves as a basis to create closed-form solution strategies. A classical access towards small and finite (visco)plasticity is integrated into this concept. This approach is based on the idea, that the balance of linear momentum is formulated in a weak sense and the material laws are included indirectly. Thus, separate time discretizations are implemented and an appropriate coupling between them is necessary. Limitations for the usage of time integrators are the consequence. In contrast, an alternative multifield formulation is derived, adapting the principle of Jourdain. The idea is to assume that the balance of energy - taking into account a pseudopotential representing dissipative effects – resembles a rate-type functional, whose stationarity condition leads to the equations describing small or finite dynamic (visco)plasticity. Accordingly, the material laws and the balance of linear momentum can be solved on the same level and only one single time discretization has to be performed. A greater freedom in the choice of time integrators is obtained and the application of higher order accurate schemes - such as Newmark’s method, fully implicit as well as diagonally implicit Runge-Kutta schemes, and continuous as well as discontinuous Galerkin methods - is facilitated. An analysis and a comparison of the classical and the multifield formulation is accomplished by means of distinct examples. In this context, a dynamic benchmark problem is developed, which allows to focus on the effect of different time integrators. For this investigation, a variety of time discretization error estimators are formulated, evaluated, and compared.

Special topic volume with invited peer-reviewed papers only

Selected peer-reviewed extended articles based on abstracts presented at the 7th International Conference on Recent Advances in Materials, Minerals and Environment (RAMM2022) Aggregated Book

Smart Materials in Additive Manufacturing, Volume 2 covers the mechanics, modeling, and applications of the technology and the materials produced by it. It approaches the topic from an engineering design perspective with cutting-edge modeling techniques and real-world applications and case studies highlighted throughout. The book demonstrates 4D printing techniques for electro-induced shape memory polymers, pneumatic soft actuators, textiles, and more. Modeling techniques with ABAQUS and machine learning are outlined, as are manufacturing techniques for highly elastic skin, tunable RF and wireless structures and modules, and 4D printed structures with tunable mechanical properties. Closed-loop control of 4D printed hydrogel soft robots, hierarchical motion of 4D printed structures using the temperature memory effect, multimaterials 4D printing using a grasshopper plugin, shape reversible 4D printing, and variable stiffness 4D printing are each discussed as well. - Outlines cutting-edge techniques, structural design, modeling, simulation, and tools for application-based 4D printing - Details design, modeling, simulation, and manufacturing considerations for various fields - Includes case studies demonstrating real-world situations where the techniques and concepts discussed were successfully deployed - Applications covered include textiles, soft robotics, auxetics and metamaterials, micromachines, sensors, bioprinting, and wireless devices - Covers the mechanics, manufacturing processes and applications of 4D-printed smart materials and structures - Discusses applications in civil, mechanical, aerospace, polymer and biomedical engineering - Presents experimental, numerical and analytical studies in a simple and straightforward manner, providing tools that can be immediately implemented and adapted by readers to fit their work

The aim of this Ebook is to provide a comprehensive overview of the basic production techniques for manufacturing of metal-based graded materials. A concise description of experimental methods and short analysis of some specific structures obtained are pr

Essential reading on the latest advances in virtual prototyping and rapid manufacturing. Includes 110 peer reviewed papers covering: 1. Biomanufacturing, 2. CAD and 3D data acquisition technologies, 3. Materials, 4. Rapid tooling and manufacturing, 5. Advanced rapid prototyping technologies and nanofabrication, 6. Virtual environments and

In the evolving market of product design, the optimization of surface patterns is a crucial factor in determining the functionality of future products. However, despite numerous surface designs introduced in recent years, the field remains significantly underdeveloped. The absence of systematic and well-defined methodologies for generating deterministic topologies has turned the design of surfaces into more of an art than a precise science. This deficiency is further exacerbated by a dominant design culture that attempts to tame nature rather than establish harmonious coexistence within the Man Engineered Systems Domain (MESD). The challenge lies in the lack of a holistic surface design methodology that can merge function, form, and topography to produce optimized constructs capable of efficient operation within an envelope of constraints. Bio-Locomotion Interfaces and Biologization Potential in 4-D Printing is a comprehensive solution to the challenges faced in biomimetic surface design. This groundbreaking book recognizes the underdeveloped state of the field and proposes a trans-disciplinary approach that seamlessly integrates engineering, physics, and biology. It addresses the need for a new surface design methodology, emphasizing the importance of generating bio-inspired functional surfaces in MESD. Unlike existing approaches that rely on mere bio-mimicry, this book delves into the core of design generation, emphasizing the implementation of design rules rather than the replication of natural constructions. It is the ultimate guide for scholars seeking to bridge the gap between biology and engineering and acquire the methodologies needed to deduce design rules and construct deterministic surfaces inspired by bio-analogues.

Fabricate 2024: Creating Resourceful Futures is the fifth volume in the series of Fabricate publications. The first conference – ‘Making Digital Architecture’ – explored the ways in which technology, design and industry are shaping the world around us. Since then, we have become finely attuned to the negative impacts of this shaping. The 2024 conference, hosted in Copenhagen, sets focus on the pressing need to develop new models for architectural production that rethink how resource is deployed, its intensity, its socio-ecological origins and sensitivity to environment. This book features the work of designers, engineers and makers operating within the built environment. It documents disruptive approaches that reconsider how fabrication can be leveraged to address our collective and entangled challenges of resource scarcity, climate emergency and burgeoning demand. Exploring case studies of completed buildings and works-in-progress, together with interviews with leading thinkers, this edition of Fabricate offers a plurality of tangible models for design and production that set a creative and responsible course towards resourceful futures.