A finite element package for learning
Project description
pyfem
A finite element package in python.
Installation
Use the package manager pip to install pyfem.
pip install pyfem
Development
ToDo list
- 增加Neumann边界条件,支持concentrated force,distributed和pressure定义方式
- 增加hdf5计算结果输出格式
- 完善帮助文档
- 完善输入文件的校检
- 增加测试模块
- 增加日志模块
- 增加后台运行模式
- 处理平面应力状态的面外应力平衡
- 增加粘弹性力学本构模型
- 增加晶体塑性力学本构模型
- 增加温度场求解单元
- 增加温度场-位移场耦合求解单元
- 增加相场-位移场耦合求解单元
- 增加内聚区单元
- 增加动力学求解器
- 建立前处理界面
Tutorial
Run in command line:
pyfem -i Job-1.toml
Job file Job-1.toml:
title = "Job-1"
[mesh]
type = "abaqus"
file = "hex8.inp"
[dof]
names = ["u1", "u2", "u3"]
order = 1
family = "LAGRANGE"
[[bcs]]
name = "BC-1"
category = "DirichletBC"
type = ""
dof = ["u1"]
node_sets = ['Set-X0']
element_sets = []
value = 0.0
[[bcs]]
name = "BC-2"
category = "DirichletBC"
type = ""
dof = ["u2"]
node_sets = ['Set-Y0']
element_sets = []
value = 0.0
[[bcs]]
name = "BC-3"
category = "DirichletBC"
type = ""
dof = ["u3"]
node_sets = ['Set-Z0']
element_sets = []
value = 0.0
[[bcs]]
name = "BC-4"
category = "NeumannBC"
type = "Distributed"
dof = ["u1"]
node_sets = ['Set-X1']
element_sets = ['Set-X1']
value = 1.0
[solver]
type = "NonlinearSolver"
option = "NewtonRaphson"
total_time = 1.0
max_increment = 1000000
initial_dtime = 0.1
max_dtime = 1.0
min_dtime = 0.001
[[materials]]
name = "Material-1"
category = "Plastic"
type = "KinematicHardening"
data = [100000.0, 0.25, 400.0, 1000.0]
[[amplitudes]]
name = "Amp-1"
type = "TabularAmplitude"
data = [
[0.0, 0.0],
[1.0, 1.0]
]
[[sections]]
name = "Section-1"
category = "Solid"
type = "Volume"
option = "SmallStrain"
element_sets = ["Set-All"]
material_names = ["Material-1"]
data = []
[[outputs]]
type = "vtk"
field_outputs = ['S11', 'S22', 'S33', 'S12', 'S13', 'S23', 'E11', 'E22', 'E33', 'E12', 'E13', 'E23']
on_screen = false
abaqus geometry file hex8.inp:
*Heading
*Preprint, echo=NO, model=NO, history=NO, contact=NO
**
** PARTS
**
*Part, name=Part-1
*Node
1, 1., 1., 1.
2, 1., 0., 1.
3, 1., 1., 0.
4, 1., 0., 0.
5, 0., 1., 1.
6, 0., 0., 1.
7, 0., 1., 0.
8, 0., 0., 0.
*Element, type=C3D8R
1, 5, 6, 8, 7, 1, 2, 4, 3
*Nset, nset=Set-X0, generate
5, 8, 1
*Elset, elset=Set-X0
1,
*Nset, nset=Set-X1, generate
1, 4, 1
*Elset, elset=Set-X1
1,
*Nset, nset=Set-Y0, generate
2, 8, 2
*Elset, elset=Set-Y0
1,
*Nset, nset=Set-Y1, generate
1, 7, 2
*Elset, elset=Set-Y1
1,
*Nset, nset=Set-Z0
3, 4, 7, 8
*Elset, elset=Set-Z0
1,
*Nset, nset=Set-Z1
1, 2, 5, 6
*Elset, elset=Set-Z1
1,
*Nset, nset=Set-All, generate
1, 8, 1
*Elset, elset=Set-All
1,
*End Part
**
**
** ASSEMBLY
**
*Assembly, name=Assembly
**
*Instance, name=Part-1-1, part=Part-1
*End Instance
**
*End Assembly
Bug list
- 采用abaqus网格文件时,如果存在node不属于任何element则在计算时会导致全局刚度矩阵奇异。
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