A force 2P is acting on the double transverse fillet weld. Leg of weld is h and length l. Determine the shear stress in a plane inclined at θ with horizontal.

A double fillet welded joint with parallel fillet weld of length '$$l$$' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by

A

$$\frac{{\sqrt 2 {\text{P}}}}{{{\text{s}}l}}$$

B

$$\frac{{\text{P}}}{{2{\text{s}}l}}$$

C

$$\frac{{\text{P}}}{{\sqrt 2 {\text{s}}l}}$$

D

$$\frac{{2{\text{P}}}}{{{\text{s}}l}}$$

A fillet-welded joint is subjected to transverse loading F as shown in the figure. Both legs of the fillets are of 10 mm size and the weld length is 30 mm. If the allowable shear stress of the weld is 94 MPa, considering the minimum throat area of the weld, the maximum allowable transverse load per weld in kN is

A

14.44

B

17.92

C

19.93

D

22.16

Parallel fillet weld and transverse fillet weld both have the plane in which maximum shear stress occurs at 45’ to the leg dimension.

A

True

B

False

The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

A

7.5 kN

B

10.6 kN

C

15 kN

D

22.5 kN

The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, $$l$$ = Length of weld and $${\sigma _{\text{t}}}$$ = Allowable tensile stress for weld metal)

A

$$0.5\,{\text{s}}l{\sigma _{\text{t}}}$$

B

$${\text{s}}l{\sigma _{\text{t}}}$$

C

$$\sqrt 2 \,{\text{s}}l{\sigma _{\text{t}}}$$

D

$$2\,{\text{s}}l{\sigma _{\text{t}}}$$

With reference to the following figure, a plate, 75mm wide and 10mm thick, is joined with another plate as shown. The permissible tensile and shear stress in the welds are 50/mm² and 40N/mm². Determine the required length of each parallel fillet weld if length of transverse weld is 40mm.

A

11mm

B

9mm

C

8mm

D

7mm

Maximum shear stress in transverse fillet weld of leg h and length l is

A

P/hl

B

1.21P/hl

C

P/1.21hl

D

None of the listed

Tresca or maximum-shear stress criteria assumes that yielding occurs when the maximum shear stress reaches a value of the shear stress in the uniaxial tension test. Assume the principal stress being σ1, σ2, σ3 where σ1 is largest, and σ3 is the smallest principal stresses. Find the value of minimum shear stress to cause yielding, given that yield stress in tension is equal to σo?

A

τ = σo

B

τ = σo/2

C

τ = σo/3

D

τ = σo/4

A single transverse weld is preferred over double transverse fillet weld.

A

True

B

False

Strength of parallel fillet weld is greater than strength of transverse fillet weld.

A

True

B

False

A force 2P is acting on the double transverse fillet weld. Leg of weld is h and length l. Determine the shear stress in a plane inclined at θ with horizontal.

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