Hey Guys, I am new to the forums but have seen you guys help alot with pointing people in the right direction. Here is my problem: A Cylinder with a Volume of 8000m3 has a pressure of 80MPa, Bulk Modulus of 74 MPa. I need to calculate the Young s modulus and determine the material type. So Far here is what i have: Using Bulk Modulus, Volumetric Strain can be found: Bulk Modulus K = Pressure / Volumetric Strain Volumetric Strain = Pressure / Bulk Modulus K = 80 x 106 Pa / 74 x 106 Pa = 1.081 Volumetric Strain Can also be determined using this formula: Volumetric Strain = Change in Volume / Volume Then the Change in Volume can be found using the Volumetric Strain: Change in Volume = Volumetric Strain x Volume = 1.081 x 8000m3 = 8648m3 My train of thought with calculating the youngs modulus is to use E = Stress (Volume x Pressure) / Volumetric strain So E = 592.05 GPa Or by Using K E = 3K(1-2v) --> 3x74MPa x (1-0.6) = 88.8MPa But neither answer looks right. Have i overlooked something here? Your input will be greatly appreciated.