Please be advised there are some changes for the Plus versions, both Wave2000 Plus and Wave3000 Plus. The changes apply to orthotropic materials and piezoelectric materials. The changes are the order of stress and strain vectors, as well as the order of corrensponding material properties. Here is an example of the changes:

New formula:

Old formula:

As shown above, besides the notation changes for strain, the orders of stress and strain vectors are changed from (11, 22, 33, 12, 23, 31) to (11, 22, 33, 23, 31, 12). If you created models using version 3.3, it is important to check if the material properties are correct when using version 3.5. Thank you for reading this note!