APM StructFEM

Russian CAE-automated strength analysis system. In fact, it is an integral part of the APM WinMachinesoftware product , but it can function as an independent one.

The APM StructFEM software product allows for the analysis of the stress-strain state (using the finite element method) of three-dimensional objects of any complexity with arbitrary fixation, static or dynamic (force or temperature) loading.

Finite element analysis tools allow preparing a structural model for calculations using bar (beam), lamellar and solid finite elements. The finite element mesh can be built automatically or manually. At the same time, the original geometry can be obtained from third-party CAD-systems by importing STEP and SAT file formats.

The product also includes a specialized calculation module for analyzing compounds in structures. This allows, having received information about the loading of the joint, to select its optimal characteristics, for example, the minimum required diameters and number of bolts or rivets, the leg and the length of the weld, etc.

APM StructFEM is intended for use in the following areas: automotive, nuclear, oil and gas, heavy and lifting and transport engineering, railway transport, education (training students of universities of technical specialties), etc.

This product is offered in two configurations:

• ST  - the dimension of tasks to be solved does not exceed 1.5 million degrees of freedom;
• XE  - there are no restrictions on the dimensions of the tasks being solved (the actual dimension is limited by the amount of RAM of the PC)

In addition to the basic features for the product, additional functionality is available (options) :

• Composite : calculation of structures made of composite materials;
• Fracture : design calculation with crack propagation analysis;
• Fatigue : fatigue analysis, calculation using random loads;
• Pipe : using special CEs for pipeline calculations;
• TopOpt : topological optimization of structures.

The product APM StructFEM is registered in the Register of Russian computer programs and databases :

The calculated core of the APM StructFEM product - the APM Structure3Dmodule - has a software certification certificate issued by ROSTEKHNADZOR, FBU NTC NRS.

Functionality APM StructFEM

Linear solutions

• Calculation of stress-strain state (static calculation)
• Calculation of safety factors and buckling

Nonlinear solutions

• Calculation of stress-strain state in view of the geometric and physical nonlinearity
• Calculation of stress-strain state in the case of contact interaction
• Calculation in the case of very large-scale deformation in view of geometrical and physical nonlinearity.
• Modeling of shock interaction (crash tests)

dynamic analysis

• Determination of frequencies and modes of vibration including 
  a preloading
• Calculation of the forced vibrations modeling system responses 
  real-time mode with a given law of variation of the driving load
• Calculation of fatigue strength under the influence of cyclical external influence at a constant, variable and random modes loaded
• Calculation of vibration bases
• Modeling the behavior of structures under seismic actions

Types of finite elements (to create a computational model)

• Rod arbitrary cross-sections
• Flexible elements sided hardness: ropes, cables and shrouds, etc.
• The shell and plate: isoparametric first order 3, 
  4 and the second 6 and node 8
• Solid volume: isoparametric first order (4, 8)
• Tubular
• Special elements: elastic connection, elastic supports, contact elements, concentrated masses and moments of inertia, etc.
• Superelement method substructures

Types of materials

• Isotropic
• orthotropic
• Anisotropic
• Multilayer
• Composite

The boundary conditions allow for the imposition of restrictions through the use of:

• absolutely rigid supports and pillars with partly exempt bonds
• elastic supports bi-directional communications
• elastic supports with unidirectional links
• rigid connections of elements, compounds with partially exempt bonds and connections eccentric elements
• supports with the given values ​​of linear and angular displacements possible
• contact elements

Loads and effects

• Concentrated forces and moments (fixed and variable over time)
• Moving loads
• Distributed loads along the length, area and volume of the load (constant, variable depending on the coordinates and time-varying)
• Loads specified linear and / or angular displacement (constant 
  and time-varying)
• Snow, wind (taking into account the fluctuating wind component), 
  as well as seismic loads (SNIP), taking into account the distributed 
  and concentrated masses, linear and rotational degrees of freedom
• Hydrostatic pressure type
• The pressure contact type
• The calculated combination of effort (DCS)
• Centrifugal (defined linear and / or angular acceleration)
• gravity

The results of the calculations are as follows:

• Maps and diagrams of equivalent stresses and their components and the principal stresses
• Maps and diagrams of linear, angular and total displacements
• Maps and diagrams of distribution of deformations in design elements
• Maps and diagrams of internal force distribution
• The map of distribution efforts in the contact zone
• Safety factors and buckling
• map allocation of safety factors and the number of the criterion of fatigue strength cycles
• Map allocation of safety factors for strength and durability
• Map of the distribution of the accumulated per unit volume of the internal strain energy
• coordinates of the center of gravity, weight, volume, length, surface area, moments of inertia design model
• Moments of inertia, static moments and cross-sectional areas
• The bearing forces and total reaction model shown in the center of gravity
• An animated presentation of the results

distribution maps are available both on the surface and the rod section and the volume elements.

Strength calculation of structures (APM StructFEM)

The Struct the APM to FEM is designed to solve a wide range of engineering problems. The system is based on the mathematical kernel of finite element analysis of the APM the Structure 3, the D .