Physics- Stress, Strain, and Elastic Modulus
Compressive stress can be applied to a rubber band. Essentially, compressive force refers to a force per unit that bears a magnitude that can result in deformation (Shahapurkar, 2021). A compressive force applied to a rubber band, an elastic object, causes it to squeeze. When compressive stress is applied to a rubber band, the band shortens in length, and the cross-sectional area decreases because the rubber molecules are forced together and arise from the compression. Rubber is highly elastic, and when a rubber band is squeezed to the extent of deforming, the force will change from compressive stress to compressive stain. Notably, compressive strain refers to the quantity that describes the deformation of objects under stress. The elasticity of a rubber band can be compressed or stretched because the polymer chains that constitute the rubber are flexible and long. They can be stressed and strained at the same time. Both stress and strain are related in the light of compression because the greater the stress, the greater the strain. However, this kind of relationship is not necessarily linear.
The relationship between stress and strain is called elastic modulus in the light of compression. It is important to note that elastic modulus occurs when there is a constant proportionality between stress and strain. The general relation between strain and stress is given in as shown in the equation below:
Compressive stress = (elastic modulus)* Strain
Using the above expression, rubber has an elastic modulus of 0.01 to 0.1 (Wu et al., 2020). Notably, this indicates that rubber is highly elastic. As indicated in the discussion above, it can be concluded that compressive stress can be applied to a rubber band, making it shorter in length and reducing the cross-sectional area.
References
Shahapurkar, K. (2021). Compressive behavior of crumb rubber reinforced epoxy composites. Polymer Composites, 42(1), 329-341.
Wu, Y. F., Kazmi, S. M. S., Munir, M. J., Zhou, Y., & Xing, F. (2020). Effect of compression casting method on the compressive strength, elastic modulus, and microstructure of rubber concrete. Journal of Cleaner Production, 264, 121746.
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Question
Can compressive stress be applied to a rubber band?