Mechanical Fasteners and Joints: Design & Function
Mechanical Joints and Fasteners
Fixed Joints
Fixed joints are used for joining thin, flat pieces that cannot support welded parts, or where welds might cause internal tensions and deform the material. Riveting is a common method for creating fixed joints.
Types of Riveted Joints
- Lap Joints: Where two pieces overlap and are riveted together.
- Butt Joints with Single Cover Plate: Where two pieces are on the same plane and are linked together by a single riveted plate (cover plate) that joins both pieces.
सामग्री, मिश्रधातु और औद्योगिक अनुप्रयोग
सतह की सफाई और यांत्रिक फिनिशिंग
सतह की सफाई और यांत्रिक फिनिशिंग विभिन्न उद्योगों में एक महत्वपूर्ण प्रक्रिया है। यह सतह की गुणवत्ता को सुधारने और उसे उपयोग के लिए तैयार करने में सहायक होती
Read MoreComplete Crown Tooth Preparation Protocol
Understanding Complete Dental Crowns
Dental crowns represent a crucial intervention, often considered a last resort to preserve a compromised tooth. They are particularly useful when a tooth requires significant recontouring to restore its normal anatomy and function. Crowns offer superior retention and resistance compared to other restorative options. A complete crown, also known as a full crown or full coverage casting, encases the entire tooth structure.
Indications for Crown Placement
- When significant
Types of Industrial Paint Coatings
Epoxy-Asphalt/Coal Tar Paint
Consisting of a mixture of epoxy and asphalt or coal tar, these paints offer excellent water resistance and good adhesion to steel and cement. They maintain adhesion over a long period of exposure and have excellent chemical resistance to acids, alkalis, and salts. They have the ability to achieve high film build in a few layers. However, they have limited resistance to weathering and are only available in dark colors.
Commonly used on steel and cement surfaces where good
Read MoreMaterial Mechanical Property Testing
Shock Testing
Shock trials distort the fragility or ability of a material to absorb instantaneous loads. They check if a machine or structure fails or becomes brittle under working conditions.
Charpy Methods
Flexion by shock on simply supported bars. The specimens are placed flat on the machine with the notch opposite to the impact point.
Izod Methods
Flexion by shock on an embedded bar. The cantilever specimen is placed in a vertical position with the notch facing the impact.
Fatigue Testing
Fatigue is
Read MoreBasic Electrical Engineering Core Concepts
Basic Electrical and Electronics Engineering
Short Questions
1. Define Voltage, Current, and Power
i) Voltage:
- Definition: Voltage is the electrical potential difference between two points in a circuit. It represents the energy required to move a unit charge between those points.
- Unit: Volt (V)
ii) Current:
- Definition: Electric current is the rate of flow of electric charge through a conductor or circuit. It measures how many charges pass through a point in a given time.
- Unit: Ampere (A)
iii) Power:
- Definition: