What is the meaning of biaxial stress?
Try it first: pick an option, then read the explanation.
Correct answer: B. Stress acting along two axes
Asked in SSC JE 16/11/2022
Detailed Explanation
States of stress are named by how many axes carry normal stress: uniaxial (one), biaxial (two), triaxial (three).
Why “Stress acting along two axes” Is Correct
Biaxial stress means normal stresses act along two mutually perpendicular axes, as in the wall of a thin cylinder (hoop and longitudinal stresses) or a plate pulled in two directions.
Why the Other Options Are Wrong
- A. Stress acting along only one axis: That is uniaxial stress.
- C. Stress acting along the tangential direction only: Tangential stress alone is shear, not biaxial stress.
- D. Stress acting along more than two axes: Three axes is triaxial stress.
Key Point
Uniaxial: 1 axis; biaxial: 2; triaxial: 3.
Key Concepts for Students
- Thin cylinder walls are in biaxial stress.
- Soil samples in a triaxial test are in triaxial stress.
- Plane stress is a common biaxial case.
Practice more: this is question 4 in Stress and Strain MCQs – Part 1. Try the whole set and check every answer instantly.