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In material science, fatigue is the continuous weakening of material because of continued loading and unloading of weight on a surface. There are many other causes of cracks. There are also many different types of cracks. The paper would discuss fatigue crack on the canvas as indicated in the picture.
When loading and unloading keep repeating on a given surface, cracks begin to emerge (Zhang, Jin and Zhao 172). It happens when the load’s weight is more than the supposedly required amount of pressure on the surface. The big crack is a result of small cracks and tension on the surface. Repeated weight pressure continuously causes the movement of the surface that reveals at the top through cracks (Nenadic 524).
In the picture, the arrow points to the place where the weakness started. The weight of the canvas causes persistent slip bands and grain interfaces on the ground. The crack within the canvas reached a critical size and caused the fracturing of the canvas (René and Turcotte 86). The sharp corners led to elevated local stresses, and hence fatigue cracks emerged. As the process of weight lifting and unloading continued at the place of fatigue, the crack spread following the lines of weaknesses in the ground (Zhang and Jin 402).
The activities that take place on the canvas could be causing the break. One of the examples is that boxers or professional wrestlers could be using the area to compete (Zhu 262). The sport requires vigorous activities where the players keep jumping and moving around. As they do so, their feet may have found a spot on the canvas that was weak. The more they practiced or competed on the canvas, the greater the crack emerged (Zhang and Jin 402).
Various theories describe the causes and origin of cracks. They result from fatigue. Miner’s Rule suggests that there can be constant different stress magnitudes. Each contributing factor increases the size of the crack. The shape could be as a result of various tension lines. But Miller’s rule does not accept the probability and nature of the break (Zhang, Jin and Zhao 172). It also allows reversals to occur. When cycles of high stress occur after low stress, fatigue levels cause more damage.
From the picture, the arrow points to the beginning of the crack. But the crack spread in directions where the tension was greater than the previous one. As the tension shaped the curve of the crack, some particles that could not be firm broke away (Parker 178). They became the small pieces that could no longer be part of the larger particle. As the pieces were shaping up on the surface, the crack also extended downward. It caused the tilting of the crack on one side. The weight on the surface and the tension under the surface tended to move towards the weak side (Zhu 262). And that is why on the far right, the small particles have chipped away until a large hole is visible. On the large particle, another crack has emerged to divide it into two large pieces. On the upper side, there is no need for the crack to spread because the fault line or ridge divides the canvas from the other canvas (René and Turcotte 86).
Fatigue comes as a result of continuous pressure on a surface. Once the stretches become difficult to contain, they tear the particles into two or more objects. The crack emerges and thus the result of the picture in the study.
Works Cited
Nenadic, Nenad G. Seeding Cracks Using a Fatigue Tester for Accelerated Gear Tooth Breaking. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2011. Print.
Parker, Bradford H. A Comparison of the Capability of Sensitivity Level 3 and Sensitivity Level 4 Fluorescent Penetrants to Detect Fatigue Cracks in Various Metals. Greenbelt, Md.: National Aeronautics and Space Administration, Goddard Space Flight Center, 2011. Print.
René, Charles, and Eugene Turcotte. Handbook of Material Science Research. New York, NY: Nova Science Publishers, 2010. Print.
Zhang, Helen, and David Jin. Advanced Research on Material Science, Environmental Science and Computer Science. Durnten-Zurich, Switzerland: Trans Tech Publications, 2011. Print.
Zhang, Helen, David Jin, and X. J Zhao. Advanced Research on Material Science, Environmental Science and Computer Science. Durnten-Zurich, Switzerland: Trans Tech Publications, 2012. Print.
Zhu, Zeng. Material Science and Engineering Technology. Durnten-Zurich, Switzerland: Trans Tech Publications, 2012. Print.
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