<Li> Point force on a surface of an isotropic half - space . </Li> <Li> Contact of two elastic bodies: the Hertz solution (see Matlab code). See also the page on Contact mechanics . </Li> <Table> <Tr> <Td> </Td> <Td> This section needs expansion with: more principles, a brief explanation to each type of wave . You can help by adding to it . (September 2010) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs expansion with: more principles, a brief explanation to each type of wave . You can help by adding to it . (September 2010) </Td> </Tr>

For a linear system type of displacement function for strain energy