NextFEMpy

NextFEM REST API wrapper in pure Python, to be used with NextFEM Designer or NextFEM Server. It is a complete set of REST API call, wrapped in Python functions, distinguishing between mandatory and optional arguments.

If you're looking for NextFEMpy source, look into /nextfempy folder. If you're looking for sample code using nextfempy, look into /samples folder.

Installation instructions

pip install nextfempy

Upgrading instructions

pip install nextfempy --upgrade

Usage

Before using with your local installation of NextFEM Designer, start the plugin REST API Server.

from nextfempy import NextFEMrest
# connect to local copy of NextFEM Designer
nf=NextFEMapiREST.NextFEMrest()

To handle a property:

nf.autoMassInX=False
print(str(nf.autoMassInX))

To call a NextFEM API method:

nf.addOrModifyCustomData("test","Test")
print(nf.getCustomData("test"))

Sample code

A simple 3D frame using REST API. Remember to start the plugin REST API Server in NextFEM Designer.

import os
from nextfempy import NextFEMrest

# current dir, to be used eventually to save model
dir = os.path.dirname(os.path.realpath(__file__))
# connects to the open instance of NextFEM Designer with REST API server plugin running on your machine
nf=NextFEMrest()

# clear model
nf.newModel()
# material and section
mat=nf.addMatFromLib("C25/30"); print("Mat="+str(mat))
cSect=nf.addCircSection(0.2)
bSect=nf.addRectSection(0.2,0.2)
# nodes
n1=nf.addNode(0,0,0); n2=nf.addNode(0,0,3)
n3=nf.addNode(3,0,0); n4=nf.addNode(3,0,3)
n5=nf.addNode(0,3,0); n6=nf.addNode(0,3,3)
n7=nf.addNode(3,3,0); n8=nf.addNode(3,3,3)
# beams
b1=nf.addBeam(n1,n2,cSect,mat); b2=nf.addBeam(n3,n4,cSect,mat)
b3=nf.addBeam(n2,n4,bSect,mat)
b4=nf.addBeam(n5,n6,cSect,mat); b5=nf.addBeam(n7,n8,cSect,mat)
b6=nf.addBeam(n6,n8,bSect,mat)
b7=nf.addBeam(n2,n6,bSect,mat); b8=nf.addBeam(n4,n8,bSect,mat)
# restraints
nf.setBC(n1,True,True,True,True,True,True)
nf.setBC(n3,True,True,True,True,True,True)
nf.setBC(n5,True,True,True,True,True,True)
nf.setBC(n7,True,True,True,True,True,True)
# loading
nf.addLoadCase("sw"); nf.setSelfWeight("sw")
nf.addLoadCase("perm"); nf.addLoadCase("var")
# floorload type
print(nf.setFloorLoad("floor1","perm",-2.5,0,0,1)); print(nf.setFloorLoad("floor1","var",-3,0,0,1))
# floor plane on beams - nodes 2,4,8,6
print("Apply loading plane: " + str(nf.addFloorPlane("floor1",2,n2,n4,n8,n6)))

# analysis: run all loadcases and print outcome
print(nf.RunModel())
nf.refreshDesignerView(0,True)