List of top Strength of Materials Questions

In a forming operation, the plastic deformation of a steel specimen starts under plane stress condition, where the principal stresses are \(σ_1=200\ Mpa\) and \(σ_2 = 100\ Mpa\). If the steel specimen follows von-Mises yield criterion, then the uniaxial tensile yield strength (in Mpa) of this steel material is ____ . (Rounded off to 1 decimal place)

In the truss shown in the figure, member AC is an inextensible string, other members are rigid, and ABCD is a square with each side of length a. The maximum value of force F (in kN) for which the truss will remain in static equilibrium is _____ . (Rounded off to 2 decimal places)

For a mild steel specimen subjected to uniaxial tensile load, which of the following is/are TRUE?

A 2D thin plate (plane stress) has $E=1.0~\text{N/m^2$ and Poisson's ratio $\mu=0.5$. The displacement field is $u=Cx^2y$, $v=0$ (in m). Distances $x,y$ are in m. The stresses are $\sigma_{xx}=40xy~\text{N/m}^2$ and $\tau_{xy}=\alpha x^2~\text{N/m}^2$. Find $\alpha$ (in $\text{N/m}^4$, integer).}

In a two-dimensional stress analysis, the state of stress at a point is shown in the figure. The values of length $PQ$, $QR$, and $RP$ are $4$, $3$, and $5$ units, respectively. The principal stresses are \underline{\hspace{3cm}. (round off to one decimal place)} \includegraphics[width=0.5\linewidth]{image8.png}

When a simply-supported elastic beam of span $L$ and flexural rigidity $EI$ is loaded with a uniformly distributed load $w$ per unit length, the deflection at the mid-span is \[ \Delta_0=\frac{5}{384}\,\frac{wL^4}{EI}. \] If the load on one half of the span is now removed, the mid-span deflection \underline{\hspace{1.5cm}.}

A circular solid shaft of span \( L = 5 \, m \) is fixed at one end and free at the other end. A torque \( T = 100 \, kN.m \) is applied at the free end. The shear modulus and the polar moment of inertia of the section are denoted as \( G \) and \( J \), respectively. The torsional rigidity \( \frac{GJ}{L} \) is \( 50,000 \, kN.m^2/rad \).
Statement i) The rotation at the free end is \( 0.01 \, rad \).
Statement ii) The torsional strain energy is \( 1.0 \, kN.m \).
With reference to the above statements, which of the following is true?

The infinitesimal element shown in the figure (not to scale) represents the state of stress at a point in a body. What is the magnitude of the maximum principal stress (in N/mm², in integer) at the point? \includegraphics[width=0.5\linewidth]{image7.png}

A hanger is made of two bars of different sizes. Each bar has a square cross-section. The hanger is loaded by three point loads in the mid-vertical plane as shown: the upper bar is $100\,\text{mm\times100\,\text{mm}$ and the lower bar is $50\,\text{mm}\times50\,\text{mm}$. Ignore self-weight and stress concentration. What is the maximum tensile stress (in N/mm$^2$) anywhere in the hanger?} \includegraphics[width=0.25\linewidth]{image27.png}

What is the ratio of maximum shear stress to average shear stress for a circular section

Match List I with List II

	LIST I		LIST II
A.	\(\frac{σ ^2v}{2E}\)	I.	Axial load
B.	\(\frac{I^2v}{2G}\)	II.	Bending load
C.	\(\frac{I^2v}{4G}\)	III.	Shear load
D.	\(∫^l_0\frac{m^2xdx}{2EI}\)	IV.	Torsional load

Choose the most appropriate answer from the options given below:

Match List I with List II

	LIST I		LIST II
A.	Shear centre	I.	Tension
B.	Principal plane	II.	slope
C.	Fixed end	III.	Shear stress
D.	Middle third Rule	IV.	Twisting

Choose the most appropriate answer from the options given below: