In the field of nonlinear structural analysis, the term 'geometric stiffness' has long been used to describe the additional terms that...

Inclined 2-Bar Truss with Geometric Nonlinearity and Transformation Matrix This example models a 2-bar inclined truss using the Updated...

This workbook builds a nonlinear axial truss model using the Newton-Raphson method and a bilinear elastic-plastic material model. It...

Introduction In post-tensioned (PT) concrete slab design, one subtle yet critical phenomenon is the axial restraint  that develops at the...

by alpsdev When working with 3D structural elements such as beams, frames, or trusses, it is often necessary to define a local coordinate...

by alpsdev, 2025 When working with 3D truss structures , the transformation between local and global coordinates becomes crucial....

In structural engineering, when analyzing 3D frames, it’s critical to correctly transform the local stiffness matrix of each element into...

It can confuse when to use allocatable keyword when declaring dynamic arrays. We have two scenarios to declare the array here First...

The way modern Fortran provides to create matrix and vector is more convenient, let's check the example below. OUTPUT: A = 1.00000000 ...

To solve the linear system Ax = b, LAPACK provide a function dgesv() see more detail https://netlib.org/lapack/explore-html-3.6.1/d7/d3b/...

Consider this example of fix-sized and allocatable array case I: Fix-sized array Case II: Allocatable array One important thing to remark...

The code will compute and get the minimum distance between 2 sets of arbitrary numbers of points in 2D space. It also draws the lines...

OpenAI. (2024). ChatGPT (4) [Large language model]. https://chat.openai.com Jeff Bezanson, Stefan Karpinski, Viral B. Shah, and Alan...

Trapezoidal rule Simpson's 1/3 rule

! Main Program PROGRAM SolveLinearSystem IMPLICIT NONE REAL, DIMENSION(3, 3) :: A REAL, DIMENSION(3) :: b INTEGER :: n ! Define the...

MATLAB allows us to pass functions as arguments of another function. This is very useful when we call other functions (for example,...

In many engineering design problems, we often have to solve the same linear system for variable load cases. As shown in the figure below,...