HOMEPAGE

 


Introduction

  https://www.fembestpractices.com/2020/09/general-opener.html

BASICS

1.       Methods of Structural Analysis

2.       Load paths in human body

3.       Load paths in a bicycle

4.       Human Body, More insights, Pain and stress

5.       Components in series / parallel - 1

6.       Components in series/parallel - 2

1.       Consistent units in FEA

Minimum Constraints

1.       Overview

2.       Application: Sanity Checks

3.       Application: Zero resultant force problems

4.       Application: Inertia Relief

Submodeling

Two-Dimensional Elements

1.       Plane stress, Plane strain and Generalized plane strain

2.       2D elements – example Problem

Tower Bolts

1.       Design analysis – simple model

2.       Review of assumptions

3.       Nonlinear model with tension-only links

General

1.       Verification and Validation

1.       Saint-Venant Principle – Interpretations and Applications

FEA and Design

1.       An overview

2.       Machine design teaching – Chief concerns

3.       Design process assessment (DPA) -1, Square Keys

1.       Design Procedure Assessment -2 , Transverse Fillet Weld

Nonlinearities

1.       Understanding Geometric Nonlinearity - 1



Comments

Post a Comment

Popular posts from this blog

Design Analysis of Tower Bolts by Kotur Raghavan

Image
In this article we will look into design requirements of tower bolts which we find as integral part of the doors of residential buildings. Design of exterior doors will be assessed from security point of view. Typical tower bolt arrangements are shown in the figure below. Fig. 1 The main part of the bolt is fastened to the door through set screws. When the door is to be secured the bolt will engage into the socket which is fastened to the frame through set screws. When all the bolts are in engaged position the door and the frame will be nearly integral. The security concern is that a burglar may use force from outside and break open the door. Load Transfer When any pushing force is applied to the door from outside, the load gets transferred to the frame partly at hinge locations and partly at socket locations. The latter force will have tendency to pull the sockets from the frame. In the entire assembly the set screw connections between the sockets and the frame happen to be the
Read more

Saint-Venant’s Principle, Interpretations and Applications by Kotur Raghavan

Image
General Adhemar Jean Claude Barre de Saint-Venant, better known as Saint-Venant, was a nineteenth century Mechanician and Mathematician. He has made pioneering contributions in the areas of fluid Mechanics and Theory of Elasticity. Fig. 1 In solid mechanics he is best remembered for development of mathematical equations applicable to torsion and the Saint-Venant’s Principle which deals with treatment of statically equivalent forces. This article is essentially concerned with Saint-Venant’s Principle, interpretations and applications. The Principle If the forces acting on a small portion of the surface of an elastic body are replaced by another statically equivalent system of forces acting on the same portion of the surface, this redistribution of loading produces substantial changes in the stresses locally but has a negligible effect on the stresses at distances which are large in comparison with the linear dimensions of the surface over which the forces are acting. There
Read more

Minimum Constraints in FEA – 5. Submodeling by Kotur Raghavan

Image
  General Submodeling is a technique usually adopted in order to fine-tune the stress results at critical locations. One conducts local analysis with refined mesh by imposing the boundary conditions from the full or global model. Deformations from the full (coarse) model are interpolated with the help of element shape functions. This is the conventional approach and is based on Saint-Venant’s principle. This can be called as Cut-Boundary-Displacement (CBD) approach. The approach is well established and promotes productivity enhancements as the need to refine the mesh in the entire structure is eliminated. However, there are two limitations. The first one is that the geometry should be identically similar in the global and the submodel. If there is any change in stiffness the computed stresses will be in error.  In addition, it is valid strictly for linear analysis. The above limitations can be overcome by resorting to one of the two variants. The first alternative is based on impos
Read more