Interactive Mesh-Free Stress Analysis for Mechanical Design Assembly With Haptics

Abstract

This paper describes a virtual reality application that performs fast stress reanalysis coupled with virtual reality and haptics that allows rapid evaluation of multiple designs throughout the product design process. The Interactive Virtual Design Application (IVDA) allows the engineer to interactively explore new design geometry while simultaneously examining the finite element analysis results. In the presence of other parts in the assembly, the new shape can be analyzed and modified, taking into consideration mating part fits. This approach supports concurrent product design and assembly methods prototyping. A "two-step" approach utilizing Taylor series approximations and Pre-conditioned Conjugate Gradient methods is used to perform quick reanalysis during interactive shape modification. The virtual environment provides an immersive threedimensional workspace. Haptics are used to provide feedback of the stress gradient as the part geometry is changed, thus facilitating the designer's understanding of the impact of shape change on product performance. ABSTRACT This paper describes a virtual reality application that performs fast stress reanalysis coupled with virtual reality and haptics that allows rapid evaluation of multiple designs throughout the product design process. The Interactive Virtual Design Application (IVDA) allows the engineer to interactively explore new design geometry while simultaneously examining the finite element analysis results. In the presence of other parts in the assembly, the new shape can be analyzed and modified, taking into consideration mating part fits. This approach supports concurrent product design and assembly methods prototyping. A "two-step" approach utilizing Taylor series approximations and Pre-conditioned Conjugate Gradient methods is used to perform quick reanalysis during interactive shape modification. The virtual environment provides an immersive three-dimensional workspace. Haptics are used to provide feedback of the stress gradient as the part geometry is changed, thus facilitating the designer's understanding of the impact of shape change on product performance.

Design of a novel serial and parallel force feedback master manipulator

“…According to mechanism configuration, the master manipulator mechanism is divided into serial type and parallel type [9]. Serial master manipulator has flexible motion and large workspace, but has large movement inertia, low stiffness, and poor force dynamic characteristics.…”

Legacy System Engineering, VPERC Consortium

“…Careful precomputation and/or linearization of the model can also yield interactive results. Such an approach was taken in [6] to give a design engineer interactive haptic feedback on stress computations given model shape changes.…”

Interactive Deformation Through Mesh-Free Stress Analysis in Virtual Reality

“…The OPCODE (Optimized Collision Detection) library [29] has been incorporated into IVDA so that several models can be analyzed and assembled without models intersecting with each other [30,31]. This software identifies collisions between deformable meshes and therefore is well suited for this work.…”