Stress and strain calculation method for contact type measurement

The invention discloses a contact type measurement stress and strain calculation method which is specifically implemented according to the following steps: step 1, defining average axial stress # imgabs0 # according to a field quantity average theory; step 2, analyzing stress and strain borne by a carbon steel matrix, and calculating a relationship between average stress # imgabs1 # and average strain in the carbon steel matrix according to the relationship between the average stress and the average strain; 3, stress and strain borne by the coating are analyzed, and the relation between the average stress # imgabs2 and the average strain in the coating is calculated according to the relation between the average stress and the average strain; 4, equivalent intrinsic strain epsilon * is defined, and the relation between the thermal strain difference value of the coating and the carbon steel matrix and the equivalent intrinsic strain is obtained; and step 5, obtaining a thermal stress difference value sigma 'T o