Final answer:
To find the stress of a strip of chicken skin, one must perform a tensile test which involves measuring the initial cross-sectional area, applying a force until the strip breaks, and then calculating stress as the force per unit area.
Step-by-step explanation:
To find the stress of a strip of chicken skin, you need to perform a tensile test, which is a common method in materials science and engineering to measure the mechanical properties of a material. In this context, stress can be defined as force per unit area within materials that arises from externally applied forces, uneven heating, or permanent deformation and which allows a material to resist these forces.
To carry out a tensile test, you would generally follow these steps:
- Prepare the specimen: Cut the chicken skin into a standardized strip shape according to the requirements of the tensile testing machine.
- Measure the initial cross-sectional area of the strip, as this will be needed to calculate the stress.
- Fix the ends of the strip on the grips of the tensile testing machine.
- Gradually apply a pulling force to the strip until it breaks, noting the force at which it breaks.
- Calculate the stress by dividing the breaking force by the initial cross-sectional area of the strip. The unit of stress is typically Pascals (Pa) or Newtons per square meter (N/m2).
Stress is a key indicator of how much deformation a material can withstand before failure, and understanding it is important for applications that require certain mechanical properties, such as in medical devices using animal tissues.