ADINA 2025 (25.00.00.634)

ADINA 2025 (25.00.00.634) is powerful finite element software, built to help you solve the most difficult nonlinear problems involving geometric, material, and load nonlinearities; large deformations; and contact conditions.

New Explicit Bathe Time Integration Solution
A new and effective explicit time integration method b1/b2 – Bathe is implemented. The method is a one parameter scheme (b1 or b2) that accurately solves analysis problems of structural vibrations and wave propagations.

Fiber-beam element
A fiber beam is a specialized type of beam element with cross-sections composed of multiple fibers. It originates from ADINA’s standard beam element, retaining most theoretical aspects except those related to handling cross-section forces and deformations. While a standard beam cross-section can be selected from the cross-section library (such as Rectangular, Pipe, Box-beam, U-beam, I-beam, L-beam, and General), the cross-section of a fiber beam is formed by combining numerous fibers. Unlike the standard beam, which has a uniform material throughout the cross-section, the fiber beam allows different materials to be assigned to different fibers, offering greater flexibility.

New and Improved Material Models

Steel Uniaxial model
The steel model is a uniaxial material model available for truss, link and fiber beam elements. The model described in this section is based on a bounding surface plasticity framework. This model captures key cyclic behaviors of structural and reinforcing steel, including: the sharp yield, yield plateau, and strain hardening behavior under monotonic loading; the Bauschinger effect, which results in a reduced yield stress when the loading direction reverses; cyclic hardening behavior, where maximum and minimum stresses increase upon cycling between constant strain levels; gradual stabilization to constant hysteretic loops during cycling; mean stress relaxation in cases of large inelastic cycles with non-zero mean strain.

The figure below illustrates the characteristics of the model. In this example, a bar is axially loaded according to a specified cyclic load pattern, and the material response is shown in terms of normalized axial stress and strain.

Plastic-Fracturing (PF) Concrete Material Model
The Plastic-fracturing-concrete (PF-concrete) material model is designed to accurately represent the limiting behavior of concrete using plastic-fracturing theory and strain-based finite element methods. It incorporates several aspects for modeling concrete, including formulations for cracking, crack opening and closure, and crushing, similar to the solution implemented for the DF-concrete model. For tensile stress-strain behavior and tension-softening, it follows classical concrete theory as implemented in the DF-concrete as well. A new approach for compressive nonlinear behavior is implemented to achieve better response predictions with limit loads for practical engineering problems.

Drucker-Prager Material and Mohr-Coulomb Material Model
Complete strain hardening behavior is added to the Drucker-Prager and the Mohr-Coulomb geotechnical material models.

ADINA is a series of leading finite element analysis software for linear and nonlinear dynamic analysis of all types of structures, as well as their interaction with fluids and heat transfer between materials. ADINA was developed to solve the most difficult nonlinear problems in a wide range of engineering disciplines. The software can create or import models from various CAD systems, including Parasolid, FEMAP, STL, or other industry-standard file types to maximize the efficiency of the analysis and design process. Direct interfaces with other Bentley Systems analysis and design applications, such as STAAD.Pro and RAM Structural System, enable you to automatically export structural models into ADINA for the development of more advanced analyses.

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