In the thickness calculation, TS stands for which property?

In the thickness calculation, TS stands for which property?

• A. Tensile Strength
• B. Thermal Stress
• C. True Stress
• D. Tensile Stress

Answer: (A)

In thickness calculations for a pressure-containing wall, you base the design on how much stress the material can safely resist in tension. That property is Tensile Strength. It represents the maximum tensile stress the material can withstand before it fails, often expressed as the ultimate tensile strength. Designers convert this into an allowable stress by applying a factor of safety, then use the stress calculations from the internal pressure (hoop and longitudinal stresses) to determine the required wall thickness so the actual stresses stay below that allowable value.

Thermal stress is the stress produced by temperature differences, which is a different concern. True stress refers to the actual stress value using the current cross-sectional area, especially after deformation, not the material’s inherent resistance to tension. Tensile stress is the stress experienced during loading, not a material property. So the property used in setting the thickness is Tensile Strength.