Improved Efficient Projection Density Function Based on Topology Optimization

Topology optimization is a powerful tool having capability of generating new solution to engineering design problems, while these designs enhance manufacturability and reduce manufacturing costs in a computational setting. Mesh-independent convergence and other techniques have been widely used as topology optimization technique, but they produce gray transition regions which is not a favorable condition for any material. In this article, a modified topology optimization formulation using a new function has been proposed. The suggested scheme makes use of the Heaviside Projection Method (HPM) to continuum topology optimization. Such technique is helpful to obtain the minimum length scale influence on void and solid phases. Application of this proposed approach is implemented to obtain the minimum compliance for macrostructures. Numerical remarkable examples illustrate the noteworthy value of the proposed approach.

The Rehabilitation Training Simulation of High Difficulty Movement and Sports Strain Site Based on Big Data

We study the rehabilitation training of damaged parts of ice and snow sports clock and ensure the physical safety of athletes. The results show that the RBF neural network updates the center, weight, and width of the radial basis function, and the predicted maximum compliance is 99%, and the minimum compliance is 93%. After many analysis times, the prediction results show that the difference between the predicted degree of conformity and the actual results is less than 8%. The RBF neural network is trained according to the risk database of sports injury, and the RBF neural network will output corresponding values to realize sports injury estimation. The experimental results show that the designed model has high precision and efficiency.

Isogeometric Shape Optimization for Design Dependent Loads

This paper presents an isogeometric shape optimization approach for a special class of problems in structural optimization known as design dependent load problems. Isogeometric method has been widely used for structural analysis and shape optimization for its advantages in modeling smooth surfaces, high accuracy, local control, and interfacing with CAD tools. Isogeometric method may be of special advantage for shape optimization problems with design dependent loads as the loads in such class of problems depend on the geometry of the designed surface. The method outlined in this paper is applicable to design dependent load problems where there is a pressure load acting on the boundary of the structure, the direction of the pressure being normal to the profile of the designed structure. In this work minimum compliance optimization subject to volume constraint is considered and isogeometric formulations based on NURBS are presented for such class of problems. The control points of the boundaries of the NURBS geometries are taken as the design variables in the optimization problems. Analytical sensitivity formulations are derived for design dependent load problems and compared with numerically derived sensitivities. A few representative 2D and 3D examples are solved and compared with existing literature to demonstrate the application of the proposed method.

Advocating for green building minimum compliance system in Rwanda: Using bricks to achieve sustainability

Development countries in Africa will see 75% increase of its current building stock until 2060 due to the economic development, rapid urbanization and population growth. Rwanda?s Third National Communication under the United Nations Framework Convention on Climate Change estimates that the carbon dioxide emissions from buildings will increase by 574% by 2050 in the business as usual scenario. The aim of this paper puts sustainable architecture and green buildings in a context of rapidly urbanizing Rwanda, showing five recently constructed brick buildings that exploit the culture while meeting the sustainability demands of the 21st century. Global sustainability agendas are advocating for the use of brick for its durability, quality, with environmental, economic, and social benefits for construction sector. This paper provides insights on the policies, such as the Green Building Minimum Compliance System, advocating for the use of brick as a sustainable construction material. Despite the rapid urbanization in Rwanda, the existing sustainable construction practices help in reducing carbon dioxide emissions, while this paper also documents results on social and economic perspectives for the community from construction sector.

Application of Topology Optimization to Thighbone/Implant Interaction Modelling

This paper presents an application of topology optimization in the analysis of the thighbone with an inserted endoprosthesis. A variational minimum compliance approach with mass constraints is employed to solve the problem. Changes in the bone structure depending on the implant’s mechanical parameters are studied. Numerical results for mass distribution in the modelled thighbone with an inserted endoprosthesis are analyzed using an original numerical algorithm and a program developed in Matlab. It is numerically proven that owing to the use of an implant with material properties similar to those of the bone no degradation of the latter in the vicinity of the implant occurs. The endoprosthesis will serve longer and the postoperative complications connected with the accelerated degradation of the bone in the neighborhood of the implant will be avoided if the implant has similar material properties as the bone.