Mechanical Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 1 (Q.No. 30)
30.
In compression test, the fracture in cast iron specimen would occur along
Discussion:
27 comments Page 1 of 3.
Hasid said:
5 years ago
Cast iron is very strong in compression but weak in shear. When a cast iron specimen is subjected to a compression test, the perpendicular cross-section bears the direct compressive stress. But a plane inclined at 45 degree to the normal plane has shear stresses due to resolved compression force.
Thus this plane is subjected to shear stress. As said earlier, cast iron is weak in shear. So failure occurs along this inclined or oblique plane.
Thus this plane is subjected to shear stress. As said earlier, cast iron is weak in shear. So failure occurs along this inclined or oblique plane.
(1)
Saurabh sharma said:
6 years ago
In case of brittle material, the failure due to compression will be shear crack failure at 45degree which is an oblique plane so the answer is B.
Ethin said:
6 years ago
For tensile test it will in the right angle plane but for compression it fail in oblique plane normally 45deg.
Swapnil said:
6 years ago
Option C is correct. I too agree.
Dwaipayan said:
6 years ago
A brittle material will always fail along tge plane which is normal to the stress axis for uniaxial tension as it follows the maximum normal stress condition.
Nisar said:
8 years ago
The angle can be specified as 45 degrees for a brittle material.
Kaivalya sai said:
8 years ago
Oblique plane is the correct answer. I agree.
Chandra prakash said:
8 years ago
Every brittle material is in compression test fail at the oblique plan, but not at an angle of 45 degrees.
Sozharajan said:
8 years ago
Plane in any direction except 90 and 0 degree is called oblique plane example we find the stress at 32-degree in the plane, then the stress is called oblique stress.
Rajkumar thakur said:
8 years ago
In compression, brittle failure plane will be oblique since failure due shear, and in case tension test brittle material failure plane will be right angle to the axis.
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