Determine the force in the link DE of the metal cutter. 15° 400 mm 15% 20 mm $15⁰ 15° 20 mm 400 mm Ca E D B 5-P 30 mm 80 mm/ A 15° 100 N 100 N
Design Against Fluctuating Loads
Machine elements are subjected to varieties of loads, some components are subjected to static loads, while some machine components are subjected to fluctuating loads, whose load magnitude tends to fluctuate. The components of a machine, when rotating at a high speed, are subjected to a high degree of load, which fluctuates from a high value to a low value. For the machine elements under the action of static loads, static failure theories are applied to know the safe and hazardous working conditions and regions. However, most of the machine elements are subjected to variable or fluctuating stresses, due to the nature of load that fluctuates from high magnitude to low magnitude. Also, the nature of the loads is repetitive. For instance, shafts, bearings, cams and followers, and so on.
Design Against Fluctuating Load
Stress is defined as force per unit area. When there is localization of huge stresses in mechanical components, due to irregularities present in components and sudden changes in cross-section is known as stress concentration. For example, groves, keyways, screw threads, oil holes, splines etc. are irregularities.
![**Toggle Clamps: Analyzing Force**
The figure below shows a toggle clamp. If force F is exerted as shown, determine the vertical clamping force at E.
[Include detailed explanation of any graphs or diagrams if presented here.]
**Explanation of Diagram:**
The diagram typically illustrates a mechanical setup of a toggle clamp, which is a fastening device used to hold a workpiece in place. The toggle clamp shown in the figure is subjected to an external force labeled as F. The objective is to calculate the resultant vertical clamping force at point E.
To solve this problem, follow these steps:
1. **Identify Points and Forces:** Clearly mark the locations where forces are applied and their directions.
2. **Analyze Lever Arms:** Determine the length of lever arms involved in the clamping mechanism.
3. **Apply Static Equilibrium Equations:** Use equations of static equilibrium to relate the exerted force F to the clamping force at E.
4. **Calculate Moments:** Consider moments around relevant points to simplify the calculations.
The calculated clamping force at E will help in understanding how effective the toggle clamp is in securing the workpiece under the applied force F.
**Note:** Ensure to refer to the specific diagram provided in your materials for accurate comprehension and analysis.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2ceacb0b-43f6-4b23-a073-44942bf7117a%2F87cf8009-634f-4bb1-a000-45fb5b5cae13%2F00842ni_processed.png&w=3840&q=75)


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