Solid modeling
Solid modeling is used to describe three-dimensional solids using mathematical methods. Solid modeling plays a particularly important role in computer-aided design in product development and simulation. Closely related scientific disciplines are computer graphics and geometric modeling .
description
The use of solid modeling techniques enables the automation of several difficult design calculations that are performed as part of the design process. The simulation, planning, and review of processes such as machining and assembly was one of the main catalysts for the development of solid modeling. More recently, the range of manufacturing applications supported has expanded significantly to include sheet metal fabrication, injection molding , welding , piping, etc. Beyond traditional manufacturing, volume modeling techniques serve as the basis for rapid prototyping , digital data archiving and reverse engineering through the reconstruction of solids from sample points on physical objects, mechanical analysis using finite elements, motion planning and NC path verification, kinematic and dynamic analysis of mechanisms. A central problem with all of these applications is the ability to effectively represent and manipulate three-dimensional geometry in a way that is consistent with the physical behavior of real artifacts. Solid modeling research and development has addressed many of these problems and remains a central focus of computational development.
Historical development
The history of solid modeling is closely related to the development of computer-aided design . In 1982, Romulus was the first commercial solid modeling kernel to be launched. The developers were Ian Braid, Charles Lang and the Shape Data team in Cambridge , England. CAD software providers such as Siemens and Hewlett-Packard use this for their products. Today, among the solid modeling kernels, ACIS from the French Groupe Dassault and Parasolid from Siemens PLM Software should be mentioned. Parasolid was once developed by Shape Data Ltd. developed.
Representation of solids
There are various possibilities for the mathematical description of solids. Among other things, the following can be mentioned here:
Boundary representation
In this model , the solid is described by its limiting surfaces.
Constructive Solid Geometry
In this model, solids are represented by combining objects using Boolean algebra .