A machine component is subjected to a load of P = 3,800 N. Which stress element represents the state of stress at point H? 25 mm 3.800 N 18 mm 50 mm 5 mm 12 mm 5 mm
A machine component is subjected to a load of P = 3,800 N. Which stress element represents the state of stress at point H? 25 mm 3.800 N 18 mm 50 mm 5 mm 12 mm 5 mm
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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
Transcribed Image Text:### Stress Analysis of a Machine Component
#### Problem Statement:
A machine component is subjected to a load of \( P = 3,800 \, \text{N} \). Which stress element represents the state of stress at point H?
#### Diagrams & Dimensions:
1. **Diagram of the Machine Component:**
- The machine component has an L-shaped arm that is anchored at the base.
- The load \( P \) of 3,800 N is applied horizontally at the end of the arm.
- The arm has the following dimensions:
- 25 mm from the base to the first bend vertically.
- 50 mm horizontally to the point where the load is applied.
- Cross-section:
- Height: 12 mm
- Width: 18 mm
- Thickness: 5 mm
2. **Cross-Sectional View:**
- The cross-sectional view is shown, highlighting the dimensions and the point \( H \), which is 5 mm from the bottom of the cross-section and in the middle along the width.
#### Stress Element Candidates:
Five different stress elements are presented, depicted as small squares with arrows indicating different types of stresses:
- **Option 1:** Exhibits both normal and shear stresses on all faces.
- **Option 2:** Shows primarily shear stresses.
- **Option 3:** Has normal stresses on vertical and horizontal faces, with no shear stress.
- **Option 4:** Displays shear stresses in opposite directions on each face.
- **Option 5:** Exhibits normal stresses on horizontal faces and shear stresses on vertical faces.
#### Explaination:
Given that point H is subjected to a load \( P \) of 3,800 N, we need to analyze the state of stress induced at that point. The different types of stresses that can occur are:
- **Normal Stress (σ):** Perpendicular to the face.
- **Shear Stress (τ):** Parallel to the face.
#### Conclusion:
Determine which stress element correctly represents the state of stress at point H considering the direction and nature of the load \( P \).
---
This problem helps understand the different types of stress elements and their implications in mechanical structures subjected to specific loads. It is crucial for solving real-world engineering problems, ensuring the reliability and safety of structural components.
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