Virtual Experiment System for Material Mechanical Performance Testing Based on VB and VRML

A virtual experiment system is built for material mechanical performance testing. The development process, including object modeling, 3D scene building, VRML connecting to the real-time database, design of interactive virtual 3D scene and complex virtual interaction, is discussed in this paper. In addition, the following key problems have been solved during the system development: virtual models building and geometrical transforming, database designing and optimizing, 3D virtual experimental scenes combining dynamically, the realization of database accessing and the communication of virtual entities.