GATE ME 2014 Set 4 — Question 65
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Machine Design → Joining → Bolted, Riveted & Welded Joints
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Question
A butt weld joint is developed on steel plates having yield and ultimate tensile strength of MPa and MPa, respectively. The thickness of the plates is mm and width is mm. Improper selection of welding parameters caused an undercut of mm depth along the weld. The maximum transverse tensile load (in kN) carrying capacity of the developed weld joint is _______
Correct answer
68 to 72
Solution
The maximum transverse tensile load carrying capacity of a weld joint is determined by the ultimate tensile strength of the material and the minimum cross-sectional area available to resist the load.Given Data:
The undercut reduces the thickness of the plate at the weld joint. The effective thickness is the remaining thickness after subtracting the undercut depth:Step 2: Calculate the effective cross-sectional area ()
The area resisting the transverse tensile load is the product of the width and the effective thickness:Step 3: Calculate the maximum load carrying capacity ()
To find the maximum capacity, we use the ultimate tensile strength ():Step 4: Convert the load to kNThe maximum transverse tensile load carrying capacity is kN, which falls within the accepted range of to .
- Yield strength, MPa
- Ultimate tensile strength, MPa
- Original plate thickness, mm
- Plate width, mm
- Undercut depth, mm
The undercut reduces the thickness of the plate at the weld joint. The effective thickness is the remaining thickness after subtracting the undercut depth:Step 2: Calculate the effective cross-sectional area ()
The area resisting the transverse tensile load is the product of the width and the effective thickness:Step 3: Calculate the maximum load carrying capacity ()
To find the maximum capacity, we use the ultimate tensile strength ():Step 4: Convert the load to kNThe maximum transverse tensile load carrying capacity is kN, which falls within the accepted range of to .
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