Stresses caused by forces

Stresses caused by forces

1. Applied force = shape change

   • Resistance of change = stress
     • Different forces affect structures in various ways
       • Force cannot be seen directly
         • Measured by deformation caused
           • Result of
             • Applied loads
             • Changes in temperature
             • Changes in moisture content

2. Tensionised

   • Tensile stress
     • Forces act away from each other
       • Stretched
         • Pull

3. Compressed

   • Compressive stress
     • Forces act towards each other
       • Squashed
         • Push

4. Torsioned

   • Shear stress
     • Materials slide away from each other
   • Bending stress
     • Forces cause deflection
       • = distance structure moves or changes position
       • Combination of push and pull
         • Tension and compression