## Category Archives: Stress Analysis

## Strength Criteria of Composite Material supported by FEM analysis

Strength Criteria of Composite Material supported by FEM analysis Continue reading

## Static Condensation – FEM Analysis

Background Theory With “condensation” is indicated a procedure adopted for the structural analysis to carry out a matrix of stiffness and load boundary conditions of a detailed finite model (DFEM), starting from a raw global finite model (GFEM). The DFEM … Continue reading

## 2.6. Calculation of Elastic Constants

2.6. Calculation of Elastic Constants Continue reading

## 2.5. Thermal Stress

1 . Analysis of the Orthotropic Lamina 1.1. Introduction 1.2. Hooke’s Law 1.3. Relationships between elastic constants and Matrix of Elasticity 1.4. Matrix of Elasticity 2. Classical theory of Laminates 2.1. Introduction 2.2. Basic Formulas 2.3. Laminate stiffener matrix 2.4. … Continue reading

## 2.4. Calculation of Stress and Strain

2.4. Calculation of Stress and Strain Continue reading

## Contact simulation with MSC/Nastran

Linear Gap The linear GAP is the simpliest contact form used in Nastran simulations. Linear GAP can solve a large class of problems like hole bearing, heel-toe interaction, fitting contacts. Linear, therefore does not include frition, large displacements, and material … Continue reading

## Non linear Buckling with FEM approach

Buckling analysis assesses the stability characteristics of a structure. An accurate solution to a buckling problem requires more efforts than just following a numerical procedure, there are a number of factors to consider before a buckling solution can be accepted … Continue reading

## Buckling of an imperfection-sensitive cylindrical shell

Buckling of an imperfection-sensitive cylindrical shell (EXTRACTED FROM ABAQUS GUIDE) This example serves as a guide to performing a postbuckling analysis using Abaqus for an imperfection-sensitive structure. A structure is imperfection sensitive if small changes in an imperfection change the … Continue reading

## Nastran run in batch mode

Sometimes is necessary to perform several Nastran runs, and by running one by one could be necessary a lot of time. Hereafter are illustrated two methods to speed up these operations. There is an effective method to perform this operation … Continue reading