Merge pull request #14 from saullocastro/tsdt_sym

TSDT symmetric

Author: saullocastro

CITATION.cff

@@ -5,6 +5,6 @@ authors:
     given-names: "Saullo G. P."
     orcid: "https://orcid.org/0000-0001-9711-0991"
 title: "Methods for analysis and design of composites"
-version: 0.8.0
+version: 0.8.1
 doi: 10.5281/zenodo.2871782
-date-released: 2025-07-04
+date-released: 2025-07-15

README.md

@@ -31,7 +31,7 @@ Citing this repository
 ----------------------
 
 Castro, SGP. Methods for analysis and design of composites (Version
-0.8.0) [Computer software]. 2025. https://doi.org/10.5281/zenodo.2871782
+0.8.1) [Computer software]. 2025. https://doi.org/10.5281/zenodo.2871782
 
 Bibtex :
 

composites/__init__.py

@@ -8,18 +8,26 @@
 The ``composites`` module includes functions used to calculate properties and
 perform analysis on laminated composites and isotropic plates.
 
-Classical and first-order shear deformation theories are supported. For
-classical plate theories or classical laminated plate theories (CLPT), the
-relevant matrices are A, B, D, whereas for the first-order shear deformation
-theories (FSDT) the matrices are A, B, D, E. All these matrices are part of the
+Classical, first- and third-order shear deformation theories are supported. For
+classical plate theories or classical laminated plate theories (CLPT), and for
+the first-order shear deformation theory (FSDT) the relevant matrices are the
+A, B, D and Atrans. For the third-order shear deformation theory (TSDT) the
+relevant matrices are the A, B, D, E, F, H; and the Atrans, Dtrans and Ftrans.
+The matrices indicated with "trans" are 2 by 2 matrices containing the
+transverse shear stiffnesses.  All these matrices are part of the
 :class:`.Laminate` object.
 
+The implementation of the CLTP, FSDT and TSDT closely follows the notation
+adopted by::
+
+    Reddy J.N., Mechanics of laminated composite plates and shells, theory and
+    analysis. Second Edition, Boca Raton: CRC Press, 2004.
+
 For isotropic plates, the :class:`.Laminate` object is also used for
 convenience, and since offsetting the mid-surface is supported, there can be an
 extension-bending coupling (B matrix) different than zero even for isotropic
 plates.
 
-
 The most convenient usage is probably with the
 :func:`composites.utils.isotropic_plate` or the
 :func:`composites.utils.laminated_plate` functions::
@@ -43,10 +51,9 @@
 
     >>> plate.ABD
 
-and when transverse shear stiffnesses are required, the ``ABDE`` matrix, with
-``shape=(8, 8)``::
+and when transverse shear stiffnesses are required, with ``shape=(2, 2)``::
 
-    >>> plate.ABDE
+    >>> plate.Atrans
 
 .. automodule:: composites.core
     :members:

composites/core.pyx

@@ -733,6 +733,13 @@ cdef class Laminate:
         self.B66 = 0
 
         # TSDT
+        self.E11 = 0
+        self.E12 = 0
+        self.E16 = 0
+        self.E22 = 0
+        self.E26 = 0
+        self.E66 = 0
+
         self.F16 = 0
         self.F26 = 0
         self.H16 = 0

doc/source/index.rst

@@ -28,14 +28,14 @@ https://github.com/saullocastro/composites
 Citing this library
 -------------------
 
-Castro, S. G. P. Methods for analysis and design of composites (Version 0.8.0) [Computer software]. 2025. https://doi.org/10.5281/zenodo.2871782
+Castro, S. G. P. Methods for analysis and design of composites (Version 0.8.1) [Computer software]. 2025. https://doi.org/10.5281/zenodo.2871782
 
 Bibtex :
 
     @misc{composites2025,
         author = {Castro, Saullo G. P.},
         doi = {10.5281/zenodo.2871782},
-        title = {{Methods for analysis and design of composites (Version 0.8.0) [Computer software]. 2025}}
+        title = {{Methods for analysis and design of composites (Version 0.8.1) [Computer software]. 2025}}
         }
 
 Tutorials

setup.py

@@ -86,7 +86,7 @@ def read(fname):
 """
 
 is_released = True
-version = '0.8.0'
+version = '0.8.1'
 
 fullversion = write_version_py(version, is_released)