This can be a result of tensile -LRB- pulling -RRB- forces , compressive -LRB- pushing -RRB- forces , shear , bending or torsion -LRB- twisting -RRB- .

It can be a result of tensile -LRB- pulling -RRB- forces , compressive -LRB- pushing -RRB- forces , shear , bending or torsion -LRB- twisting -RRB- .
