Problem 914 | Combined Axial and Bending

Problem 914
The structure shown in Figure P-914 is hinged to fixed is hinged to fixed supports at A and C. Assume that the pin connections at A, B, and C are frictionless. The bars are each 4 in. by 4 in. in section. Compute the maximum compressive stress developed in bar AD.



Solution 914


a block weighting 1000N is kept on a rough plane inclines at 40 digress to the horizontal the coefficient of friction between the block and the plane is 0.6.Determine the smallest force inclines at 15 digress to the plane required just to move the block up the plane.

Neil tambz

Let: P=force needed to move up the block

Take summation of forces vertical

N=1000cos40+Psin15 eq.1

Take summation of forces horizontal Fh=0;

Pcos15=F+100sin40 eq.2

note: F=uN

where F stands for friction force
u stands for coefficient of friction
N stands for normal force on plane

Subst. eq. 1 to the formula;

F=0.6[(1000cos40+Psin15] eq.3

Then subst. eq.3 to eq.2;


Solving for P;

P=1359.94 N answer

Hope this will help you..

Mithran Venkatesh
Mithran Venkatesh's picture

sir what software you are using to draw the beam diagram with different support conditions like pin and dollar supports

MATHalino's picture

MS Visio for figures in this page.

Topic locked
Subscribe to on