Structures that are normally loaded (or stressed) in more than one direction at once are said to be biaxially loaded. Due to the uncertainty and limitations in understanding how these materials, while under multiple stresses, behave during impact, their adoption by industry has been slowed. Limiting material testing to uniaxial tests can misrepresent the behavior of a material in an engineering structure. Using more realistic, biaxial loadings during these tests leads to more accurate modeling of the expected behavior of the structure as would occur in specific applications, which could lead to greater use of composites.