Simulation and Experimental Tests of Ballistic Impact on Composite Laminate Armor

Table 5

Mechanical properties of Kevlar 29. XY axes lie in the plane of the layers whereas Z is perpendicular to the layer [14].

Orthotropic elasticity
Temperature (°C)	Young’s modulus X direction (Pa)	Young’s modulus Y direction (Pa)	Young’s modulus Z direction (Pa)	Poisson’s ratio XY	Poisson’s ratio YZ	Poisson’s ratio XZ	Shear modulus XY (Pa)	Shear modulus YZ (Pa)	Shear modulus XZ (Pa)
25	1.85e + 010	1.85e + 010	6e + 009	0.25	0.33	0.33	7.7e + 008	5.43e + 009	5.43e + 009
Constant and response
Density (kg·m^−3)					Specific heat constant pressure J·kg^−1·C^−1
1440					1420
Yield strengths
Compressive yield strength (Pa)					Tensile yield strength (Pa)
1.85e + 008					1.85e + 009