This example problem demonstrates how to model a fluid that is fully enclosed by a solid (the container). The problem shows how loading on the container and container deformation affect the pressure, volume, density and mass of the contained fluid. Highlights include modeling hydrostatic fluid elements with negative and positive volumes, use of a gas material model, and reinforcing.

This example problem demonstrates how to simulate stent-artery interaction during and after stent placement in an occluded artery. The analysis uses advanced modeling techniques including contact, element birth and death, mixed u-P formulation, and nonlinear stabilization.

This example problem demonstrates the capabilities and advantages of the surface-projection-based contact method in a highly nonlinear problem. This analysis of a rubber boot seal model includes geometric, material, and changing status nonlinearities (contact). Highlighted analysis capabilities include 3-D surface-to-surface contact element technology, surface-projection-based contact, and the use of Neo-Hookean hyperelastic material.

This example problem is the second of two problems that simulate a rocket nozzle. The new problem demonstrates how to simulate the thermal stresses induced during the operation of the nozzle. (The existing problem demonstrates how to simulate the thermal stresses during the manufacturing stage of a rocket nozzle.)

It is assumed that the rocket has been launched and that hot gases are flowing through the nozzle, subjecting the inside and outside of the nozzle body to convection heat loading. The heat loading leads to a significant thermal gradient through the thickness of the body that manifests as high thermal stresses. Solid thermal and structural elements accurately simulate the multiphysics of the problem. While a fully coupled element could solve the problem, a loose coupling method is used instead. Because the body material could be homogenous or a layered composite, the simulation requires a solid element type with both homogeneous and layered material capabilities.

Hot-rolling is a metal-forming process occurring above the recrystallization temperature of the material. Many types of hot-rolling processes exist, including structural shape rolling, where a component is passed through rollers to achieve the desired shape and cross section. Structural steel is the most common hot-rolled material.

In this example problem, the hot-rolling process to form the I-beam is simulated statically using rezoning to repair a severely distorted mesh in a 3-D large-deformation analysis. The analysis also uses contact technology and symmetric expansion.

This example problem demonstrates how to simulate the friction stir welding (FSW) process. Several typical characteristics of FSW are presented, including plastic deformation, tool-workpiece surface interaction, and heat generation due to friction and plastic deformation. Thermal and mechanical behaviors are mutually dependent and coupled together during the process. A nonlinear direct coupled-field analysis is performed. Highlighted analysis capabilities include direct structural-thermal analysis using solid coupled-field elements, frictional heat generation using contact elements, plastic heat generation in coupled-field elements, and use of surface-projection-based contact.

This example problem demonstrates the use of acoustic elements coupled with structural elements to analyze the performance of a speaker assembly. Highlights include structural-acoustic coupling using fluid-structure interaction (FSI) in 3-D, a symmetric FSI algorithm, perfectly matched layers (PML) to absorb outgoing acoustic waves, sound pressure level (SPL) and velocity postprocessing, far-field postprocessing of acoustic field, and user-defined symmetric expansion options.

Routines and functions documented in the Programmer's Manual have been updated to reflect the current source code. To see specific changes in a file, ANSYS, Inc. recommends opening both the old and current files (using a text editor that displays line numbers), then comparing the two to determine which lines have changed. You can copy the updated files to your system by performing a custom installation of the product.