DLP-MECH-PP114 :Welded joints calculations Calculations of Machine Parts Welded joints calculations

The document provides an overview of stress and its application in welding, focusing on two common types of welds: butt welds and fillet welds. Stress, defined as the force per unit area (measured in Pascals or Newtons per square meter), is fundamental in understanding how materials respond to applied forces. Butt joints, used for end-to-end alignment of parts, experience stress calculated as

𝜎=𝑃𝐴​, where

P is the applied load and

A is the cross-sectional area of the joint. 

The area is determined by the thicknessh and length l of the joint.

Fillet welds, characterized by a triangular cross-section, are subjected to shear stress. The maximum allowable load P for a fillet weld is computed using the equation

𝑃=0.707×ℎ×𝑙×𝜏, where

h is the leg length,

l is the effective length of the weld, and

τ is the allowable shear stress for the weld material.

Two practical examples are provided to illustrate these concepts:

Calculating axial tensile stress in a butt joint given the joint dimensions and applied load.
Determining the maximum allowable load a fillet weld can withstand based on specified parameters (throat size, effective length, allowable shear stress).

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