Combined: Bending Test, Combined Loading, Curvature in Bending, Torsion Test, Poisson's Ratio, Tensile Test

In Bending Test, during elastic deformation of the specimen, the maximum stress on the top surface of the specimen will occur in the cross-section located at: A) the edge of the fixed support of the cantilever B) the center of the length of the cantilever C) none of the choices shown D) the free end of the cantilever

A) the edge of the fixed support of the cantilever

In the Combined Loading experiment, if the two lengths: bending arm (=Lbending) and the torsion arm (=Larm) were equal then the orientation (thetap) of the maximum principal stress (sigmamax) relative to the bending stress (sigmax) is A) 22.5 degrees B) 45 degrees C) 90 degrees

A) 22.5 degrees

In uniaxial tensile testing, the maximum normal stress occurs on a plane that is oriented (see your textbook) A) 90 degrees to the tensile axis B) 45 degrees to the tensile axis C) 0 degrees to the tensile axis

A) 90 degrees to the tensile axis

In Poisson's Ratio determination of aluminum, we measured Load-Strain data under A) Load Control, i.e., constant load rate B) Displacement Control, i.e., constant displacement rate C) none of the choices shown D) Strain Control, i.e. constant strain rate

A) Load Control, i.e., constant load rate

In Bending Test, during elastic deformation of the specimen, the following strain equation is valid: A) at each point on the specimen cross-section B) none of the choices shown C) only at the center of the cross-section D) only at the surface of the specimen cross-section

A) at each point on the specimen cross-section

In Bending Test, during elastic deformation of the specimen, the following stress equation is valid: A) at each point on the specimen cross-section B) none of the choices shown C) only at the center of the cross-section D) only at the surface of the specimen cross-section

A) at each point on the specimen cross-section

In Bending Test, during plastic deformation of the specimen the following strain equation is valid A) at each point on the specimen x-section B) only at the surface of the cross-section C) none of the choices shown

A) at each point on the specimen x-section

In Bending Test, during elastic deformation of the specimen, the maximum tensile strain in a given cross-section occurs: A) at the surface of the specimen B) at the center of the cross-section C) none of the choices shown

A) at the surface of the specimen

In Bending Test, during elastic deformation of the specimen, the maximum tensile stress in a given cross-section occurs: A) at the surface of the specimen B) at the center of the cross-section C) none of the choices shown

A) at the surface of the specimen

During elastic and uniform plastic deformation of a metallic material, at a given applied load, the true strain A) is always smaller than the engineering strain B) could be smaller or larger than the engineering strain C) is always larger than the engineering strain

A) is always smaller than the engineering strain

In Torsion Testing, the shear modulus you determined from the stress-strain curve is expected to be: A) less than half of the elastic modulus E you measured in tension B) more than half of the elastic modulus E you measured in tension C) about the same as the elastic modulus E you measured in tension

A) less than half of the elastic modulus E you measured in tension

In Bending Test, during plastic deformation of the specimen the following stress equation is valid A) none of the choices shown B) only at the surface of the cross-section C) at each point on the specimen x-section

A) none of the choices shown

In the Combined Loading experiment, after computing the principal stresses and their orientation, we expect A) sigmamax to always be greater than than the maximum in-plane shear stress (taumax) B) the maximum in-plane shear stress (taumax) to always be greater than (sigmamax - sigmamin) C) all of the choices shown above D) none of the choices shown above

A) sigmamax to always be greater than than the maximum in-plane shear stress (taumax)

In making strain measurements during Poisson's Ratio determination, we zeroed the load dial and then initialized (i.e., zeroed) the strain gages. Suppose that at this instance, the specimen experiences a true tensile load of 500 lb, then A) the measured (or calculated) Poisson's Ratio will be same as the actual Poisson's Ratio B) the measured (or calculated) Poisson's Ratio will be larger than the actual Poisson's Ratio C) the measured (or calculated) Poisson's Ratio will be smaller than the actual Poisson's Ratio

A) the measured (or calculated) Poisson's Ratio will be same as the actual Poisson's Ratio

In the Combined Loading experiment, during bending only portion of the experiment, from theory we expect A) the resulting shear strain to be zero B) the resulting transverse strain to be always positive in sign C) all of the choices shown above D) none of the choices shown above

A) the resulting shear strain to be zero

In Bending Test, when a load is applied at the free end of the cantilever, the transverse strain gage on the top surface: A) shows tensile or compressive strain depending on the magnitude of the applied load B) always shows a compressive strain on the strain indicator C) always shows a tensile strain on the strain indicator

B) always shows a compressive strain on the strain indicator

In Bending Test, when a load is applied at the free end of the cantilever and the transverse strain gage is placed at the bottom surface of the cantilever, it: A) always shows a compressive strain on the strain indicator B) always shows a tensile strain on the strain indicator C) shows tensile or compressive strain depending on the magnitude of the applied load

B) always shows a tensile strain on the strain indicator

In tensile testing of aluminum, we measured Load-Strain data under A) Strain Control, i.e., contant strain rate B) Displacement Control, i.e., constant displacement rate C) Load Control, i.e., constant load rate D) None of the choices shown

B) Displacement Control, i.e., constant displacement rate

During uniaxial elastic and tensile deformation of homogeneous and isotropic solids with Poisson's Ratio less than 0.5, the volume of the specimen A) always decreases B) always increases C) stays the same

B) always increases

In uniaxial tensile testing of homogeneous and isotropic metallic materials, the ratio of transverse strain to axial strain is A) always zero B) always negative C) always positive

B) always negative

In Torsion Testing, during elastic deformation of the specimen, the maximum shear strain occurs A) none of the choices shown B) at the surface of the specimen C) at the center of the specimen cross-section

B) at the surface of the specimen

In Torsion Testing, during elastic deformation of the specimen, the maximum shear stress occurs A) at the center of the specimen cross-section B) at the surface of the specimen C) none of the choices shown

B) at the surface of the specimen

In tensile testing, after necking begins, the strain measured by the extensometer A) may or may not be a reliable value B) is not a reliable value C) is a reliable value

B) is not a reliable value

In Torsion Testing, during plastic deformation of the specimen, the shear stress equation: A) at each point on the specimen cross-section B) none of the choices shown C) only at the surface of the specimen

B) none of the choices shown

During uniaxial elastic and tensile deformation of homogeneous and isotropic solids with Poisson's Ratio equal to 0.5, the volume of the specimen A) always decreases B) stays the same C) always increases

B) stays the same

In Torsion of ductile material, the fracture surface looks as follows: A) Cup and Cone B) straight break C) jagged break

B) straight break

In the Combined Loading experiment, during bending only portion of the experiment, if the strain rosette was attached to the bottom surface of the rod, then from theory we expect A) strain "B" to be always positive in sign B) strain "C" must be the same as strain "A" in both sign and magnitude C) all of the choices shown above D) none of the choices shown above

B) strain "C" must be the same as strain "A" in both sign and magnitude

In tensile testing of metallic materials, non-uniform plastic deformation begins when the applied stress equals A) elastic modulus B) tensile strength C) elastic limit D) yield strength

B) tensile strength

In making strain measurements during Poisson's Ratio determination, we zeroed the load dial and then initialized (i.e., zeroed) the strain gages. Suppose that at this instance, the specimen experiences a true tensile load of 500 lb, then A) the measured (or calculated) Elastic Modulus will be larger than the actual Elastic Modulus B) the measured (or calculated) Elastic Modulus will be same as the actual Elastic Modulus C) the measured (or calculated) Elastic Modulus will be smaller than the actual Elastic Modulus

B) the measured (or calculated) Elastic Modulus will be same as the actual Elastic Modulus

In the Four Point Bending Setup (see Figure 6 - Experimental Setup), if we swap the load cells and weight hangers then A) the shear force in the middle span is no longer zero B) the middle span still experiences pure bending C) the deflection of the mid-point of the beam will still be upward D) the bending moment in the middle span is no longer constant

B) the middle span still experiences pure bending

In the Combined Loading experiment, if the two lengths: bending arm (=Lbending) and the torsion arm (=Larm) were equal then A) the tensile stress (sigmax) will be the same as the shear stress (tauxz) B) the tensile stress (sigmax) will be the twice as much as the shear stress (tauxz) C) the tensile stress (sigmax) will be the half as much as the shear stress (tauxz)

B) the tensile stress (sigmax) will be the twice as much as the shear stress (tauxz)

In the Four Point Bending Test (see Figure 6 - Experimental Setup), imagine that a strain gauge is glued on the bottom surface of the beam at the location of each of the three deflections indicators. The strain gauges are aligned along the longitudinal axis and connected to a meter to show all the three strain values. When weight W = 25N is placed in each of the two hangers, the strain meter will display A) the left and right strain to have the same (equal) value while the middle strain is zero B) the three strains to have the same equal value C) the three strains to have different (unequal) values D) the left and right strain to have the same (equal) value while the middle strain is nonzero but a different value

B) the three strains to have the same equal value

In uniaxial tensile testing, the maximum shear stress occurs on a plane that is oriented (see your textbook) A) 90 degrees to the tensile axis B) 0 degrees to the tensile axis C) 45 degrees to the tensile axis

C) 45 degrees to the tensile axis

The units of the modulus of resilience and modulus of toughness are same as A) energy per unit volume B) engineering stress C) all of the above D) none of the above

C) all of the above

In the Combined Loading experiment, after computing the principal stresses and their orientation, we expect A) the orientation angle thetap to be the same at each load B) the axial normal stress sigmax to always be the sum of the two principal stresses (sigmamin and sigmamax) C) all of the choices shown above D) none of the choices shown above

C) all of the choices shown above

In the Combined Loading experiment, during bending only portion of the experiment, from theory we expect A) strain "B" to be always positive in sign B) strain "C" must be the same as strain "A" in both sign and magnitude C) all of the choices shown above D) none of the choices shown above

C) all of the choices shown above

In the Combined Loading experiment, during bending only portion of the experiment, if the strain rosette was attached to the bottom surface of the rod, then from theory we expect A) the resulting shear strain to be zero B) the resulting transverse strain to be always positive in sign C) all of the choices shown above D) none of the choices shown above

C) all of the choices shown above

In the Combined Loading experiment, if the strain rosette was attached to the bottom surface of the rod then after computing the principal stresses and their orientation, we expect A) the orientation angle thetap to be the same at each load B) the axial normal stress sigmax to always be the sum of the two principal stresses (sigmamin and sigmamax) C) all of the choices shown above D) none of the choices shown above

C) all of the choices shown above

In Bending Test, when a load is applied at the free end of the cantilever and the axial strain gage is placed at the bottom surface of the cantilever, it A) shows tensile or compressive strain depending on the magnitude of the applied load B) always shows a tensile strain on the strain indicator C) always shows a compressive strain on the strain indicator

C) always shows a compressive strain on the strain indicator

In Torsion Testing, during elastic deformation of the specimen, the shear strain equation: is valid A) none of the choices shown B) only at the surface of the specimen C) at each point on the specimen cross-section

C) at each point on the specimen cross-section

In Torsion Testing, during elastic deformation of the specimen, the shear stress equation: is valid A) only at the surface of the specimen B) none of the choices shown C) at each point on the specimen cross-section

C) at each point on the specimen cross-section

In Torsion Testing, during plastic deformation of the specimen, the shear strain equation: is valid A)none of the choices shown B) only at the surface of the specimen C) at each point on the specimen cross-section

C) at each point on the specimen cross-section

In the Four Point Bending Test (see Figure 6 - Experimental Setup), imagine that a strain gauge is glued on the bottom surface of the beam at its two ends. The strain gauges are aligned along the longitudinal axis and connected to a meter to show both the strain values. When weight W = 25N is placed in each of the two hangers, the strain meter will display A) the two strain values to be different B) both the strain values to be nonzero but negative C) both the strain values to be zero D) both the strain values to be nonzero but positive

C) both the strain values to be zero

In tensile testing of metallic materials, uniform plastic deformation begins when the applied stress exceeds A) tensile strength B) elastic modulus C) elastic limit D) ductility

C) elastic limit

During elastic and uniform plastic deformation of a metallic material, at a given applied load, the true stress is A) is always smaller than the engineering stress B) could be smaller or larger than the engineering stress C) is always larger than the engineering stress

C) is always larger than the engineering stress

In Torsion Testing, the modulus of rupture value you calculated from the torque: A) is expected to be much smaller than the true maximum shear stress at the surface when the specimen fails B) is expected to be about the same as the true maximum shear stress at the surface when the specimen fails C) is expected to be much larger than the true maximum shear stress at the surface when the specimen fails

C) is expected to be much larger than the true maximum shear stress at the surface when the specimen fails

In Torsion of brittle material, the fracture surface looks as follows: A) Cup and Cone B) straight break C) jagged break

C) jagged break

Given that the electrical resistivity of strain gage material increases with temperature, if at a constant applied load the strain gage warms up but not the specimen then A) the measured axial strain will be same as the mechanical strain in the specimen B) the measured axial strain will be smaller than the mechanical strain in the specimen C) the measured axial strain will be larger than the mechanical strain in the specimen

C) the measured axial strain will be larger than the mechanical strain in the specimen

In making strain measurements during Poisson's Ratio determination, we zeroed the load dial and then initialized (i.e., zeroed) the strain gages. Suppose that at this instance, the specimen experiences a true tensile load of 500 lb, then A) the measured axial strain will be same as the actual axial strain B) the measured axial strain will be larger than the actual axial strain C) the measured axial strain will be smaller than the actual axial strain

C) the measured axial strain will be smaller than the actual axial strain

In the Four Point Bending Test (see Figure 6 - Experimental Setup), if the elastic modulus "E" of the beam is increased then the radius of curvature A) will remain the same B) will decrease C) will increase D) may increase or decrease

C) will increase

In the Four Point Bending Test (see Figure 6 - Experimental Setup), if the thickness "t" of the beam is increased then the radius of curvature A) may increase or decrease B) will decrease C) will increase D) will remain the same

C) will increase

In the Four Point Bending Test (see Figure 6 - Experimental Setup), if the width "w" of the beam is increased then the radius of curvature A) will remain the same B) will decrease C) will increase D) may increase or decrease

C) will increase

In the Four Point Bending Test (see Figure 6 - Experimental Setup), imagine that a strain gauge is glued on the bottom surface of the beam at the location of each of the three deflections indicators. The strain gauges are aligned along the longitudinal axis and connected to a meter to show all the three strain values. When weight W = 25N is placed in each of the two hangers, the strain meter will display A) left and right strains to be the same negative value while middle strain is zero value B) all three strains to be positive values C) all three strains to be zero values D) all three strains to be negative values

D) all three strains to be negative values

In Poisson's Ratio determination of aluminum, we used an Universal Testing Machine where the crosshead was moved by A) none of the choices shown B) motor-driven screws C) pneumatically-driven pistons D) hydraulically-driven pistons

D) hydraulically-driven pistons

In tensile testing of aluminum, we used an Ultimate Testing Machine where the crosshead was moved by A) hydraulically driven pistons B) pneumatically driven pistons C) none of the choices shown D) motor driven screws

D) motor driven screws

In the Combined Loading experiment, if the strain rosette was attached to the bottom surface of the rod then after computing the principal stresses and their orientation, we expect A) sigmamax to always be greater than than the maximum in-plane shear stress (taumax) B) the maximum in-plane shear stress (taumax) to always be greater than (sigmamax - sigmamin) C) all of the choices shown above D) none of the choices shown above

D) none of the choices shown above

In the Four Point Bending Test (see Figure 6 - Experimental Setup), we did not include the weight of the hangers anywhere in our data or calculations. If the weight of the hangers were included in the data, will the newly recalculated radii of curvature values A) decrease B) increase in some cases and decrease in others C) increase D) remain the same

D) remain the same

In the Four Point Bending Test (see Figure 6 - Experimental Setup), if the spacing "b" between the weight hangers and the load cells is increased then the radius of curvature A) may increase or decrease B) will remain the same C) will increase D) will decrease

D) will decrease

In the Four Point Bending Test (see Figure 6 - Experimental Setup), if the spacing "a" between the deflection indicators is increased then the radius of curvature A) will increase B) will decrease C) may increase or decrease D) will remain the same

D) will remain the same

Compared to Poisson's Ratio measured during elastic deformation of a metallic material, the Poisson's Ratio measured during uniform plastic deformation is smaller the same larger

larger