What's New

R2022x FD01 (FP.2205)

Temperature Definition in Multiple Load Case Analysis

You can define a temperature field inside a load case in a static perturbation analysis.

You can now specify a predefined temperature field inside a load case in a static perturbation analysis. This capability allows you to perform a multiple load case analysis with a temperature field varying between load cases.

Benefits: A multiple load case analysis is generally much more efficient than the equivalent multiple step analysis.

For more information, see Multiple Load Case Analysis

Fluid Pressure Penetration Surface Loading with General Contact

You can now define fluid pressure penetration loads as surface loads that consider the contact pressure field arising from general contact in both Abaqus/Standard and Abaqus/Explicit.

A new distributed surface load type, PPEN, is used to model fluid pressure loads, similar to other distributed surface loading options, so that changes across steps and time variations in fluid pressure follow the same usage patterns as other load types. Unlike the preexisting method, this method does not require matching surface names in contact definitions and load definitions and does not require user specification of the main-secondary roles. In addition, the new method is available in both Abaqus/Standard and Abaqus/Explicit, while the preexisting method is available only for Abaqus/Standard.

The two figures below show initial and final extents of surface area exposed to fluid pressure for three variants of an axisymmetric O-ring seal simulation. The O-ring is compressed into a cavity between analytical rigid surfaces prior to the introduction of fluid pressure penetration loading in the top-left corner of the cavity. The first two cases shown in these figures use this new capability in Abaqus/Standard and Abaqus/Explicit, respectively. The third case corresponds to the preexisting capability. These three simulations provide similar results.

Benefits: This method provides more generality and ease of use than the previously available method in which fluid pressure penetration loads are applied pairwise in concurrence with contact pairs.

For more information, see Fluid Pressure Penetration Loads

Uniform Temperatures and Field Variables

You can now more easily define uniform temperatures and field variables as initial conditions and prescribed fields on nodes, node sets, and the whole model as required.

The main advantage of this new functionality is for models with shell and beam elements. To define uniform temperature and field variables in prior releases, you were required to manually specify the value for every temperature or field point on the shell or beam section attached to each node. With the new functionality, you only need to specify the uniform value once. In addition, you can omit the node number or node set to apply the specified uniform temperature or field variable to all nodes in the model automatically.

Benefits: You can define uniform temperatures and field variables as initial conditions and prescribed fields, which particularly improves the process for models with shell and beam elements.

For more information, see Initial Condition Types Predefined Fields