suanPan-v3.5

What's New:

1. add MaxForce constraint #204
2. update Armadillo to version 14.0.2
3. update OpenBLAS to version 0.3.28
4. update Catch2 to version 3.7.0
5. revise stiffness matrix formulation in shell elements #208
6. add dev containers for easier DE setup

suanPan-v3.4

What's New:

1. update Armadillo to version 12.8.2 #193
2. plane strain Duncan-Selig soil model #195
3. update Catch2 to version 3.5.4
4. update TBB to version 2021.12.0 #199
5. update MUMPS to version 5.7.1 #202

suanPan-v3.3

What's New:

1. (breaking) revise syntax for ConcreteTsai, Concrete21 and Concrete22 using a more consistent definition
2. fix tangent stiffness in ConcreteK4 model #171
3. update OpenBLAS to version 0.3.25
4. update SuperLU to version 6.0.1
5. better RCM algorithm that may result in a smaller bandwidth, thus, potentially more efficient
   solving #175
6. update Armadillo to version 12.6.7 #180
7. enable lazy evaluation and avoid temporary global matrices, faster dynamic
   analysis #183
8. bugfixes: #185
9. update Catch2 to version 3.5.2
10. update fmt to version 10.2.1
11. add nonviscous damping: NonviscousNewmark (global level integrator), ElementalNonviscous (element level
    modifier) and Nonviscous01 (material level model)

suanPan-v3.2

What's New:

1. revise uniaxial universal damage models #153
2. update OpenBLAS to version 0.3.24
3. add a new uniaxial concrete model ConcreteK4 #155
4. add beam element for arbitrary thin-/thick-walled open/close section with torsion and warping B31OS #159
5. better local iteration convergence criterion #161
6. B31OS and EB31OS associated transformations B3DOSL, B3DOSC; sections, Fibre3DOS, Cell3DOS; material wrappers OS146, OS146S
7. add elemental damping using Lee's model
8. support Lode angle in CDPM2 #163
9. add AICN cubic Newton solver #165
10. remove Bilinear2D material, use PlaneStress/PlaneStrain wrapper and BilinearJ2 3D model instead

suanPan-v3.1

What's New:

1. iterative solvers by the Lis library #145
2. update Armadillo to version 12.6.3 #149
3. add TimberPD 3D material for timber #151

suanPan-v3.0

What's New:

1. add experimental MAGMA based GPU sparse solver #123
2. add nonlinear transformation for shell elements #124
3. update VTK to version 9.2.6
4. add CustomNodeGroup #126
5. add TranslationConnector #127
6. add CustomAmplitude #129
7. update Armadillo to version 12.2 #134
8. add AsymmElastic1D #135
9. update TBB to version 2021.9.0
10. update MUMPS to version 5.6.0

suanPan-v2.9

A maintenance release focusing on performance improvement.

Non-AVX binaries are available.

What's New:

1. matrix optimsation
2. update Catch2 to version 3.3.1
3. update TBB to version 2021.8.0
4. add mixed precision algorithm for MUMPS solver #119
5. add CustomDegradation, CustomGurson and CustomGurson1D models
6. update Armadillo to version 12.0 #121

suanPan-v2.8

What's New:

1. better on screen display with the fmt library #99
2. add command overview
3. update OpenBLAS to version 0.3.21
4. add Euler buckling load check for T2D2 #104
5. speed-up analysis with visualisation recorder #102
6. update VTK to version 9.2.5
7. add Expression to support custom function definition #105
8. add CustomMises1D, CustomCC, CustomCDP, CustomDP, CustomJ2 and CustomHoffman models

suanPan-v2.7

Merry Christmas! What's New:

1. optimise assembling of symmetric global matrices #79
2. extend BatheTwoStep to allow customisation of spectral radius #81 and sub-step size #82
3. update Catch2 to version 2.13.10
4. update Armadillo to version 11.4
5. update modern Arpack #94
6. add Tchamwa #88, BatheExplicit #90 and GeneralisedAlphaExplicit #93 explicit time integration methods
7. add OALTS two-step implicit time integration method #92
8. add Sinh1D and Tanh1D nonlinear elastic 1D material
9. add linear_system flag to speed up linear system analysis

suanPan-v2.6.1

This patch mainly addresses the failure of loading plain text data, such as tabular amplitude.

What's New:

1. add -nu (--noupdate) flag to skip check of new version on startup
2. fix issue #74