
The maximum moment produces bending stresses that vary over the depth of the cross section as shown. Note the discontinuity in stress magnitudes at the junction of the timber and CFRP plate. The bending strain in both materials is identical at this location, but the elastic modulus of the CFRP is 14 times greater than the elastic modulus of the timber. Therefore, the CFRP stresses are 14 times greater than the wood stresses at this location.