Global Approach on the Shear and Cross Tension Strength of Resistance Spot Welded Thin Steel Sheets

Abstract

Several correlations from the professional literature describing the shear and cross tension strength (STS and CTS) of resistance spot welded (RSWed) thin steel sheets were investigated. Some of them need chemical composition or weld nuggets strength hardness as input parameters, making them hardly applicable in the planning stage of the joints. Using STS and CTS data collected from over 250 papers, selected correlations were tested, whether they are applicable to predict the STS and CTS of the RSWed joints at the planning stage to help designers plan their static-loaded welds strength. Most correlations had limitations in the applicable base materials' tensile strength range. Therefore, new equations for STS and CTS are proposed, which can be used to plan in the 300–18900 MPa base metals tensile strength range for similar and dissimilar RSWed joints of thin steel sheets.

Behaviour of resistance spot welded thermomechanically rolled high strength steels under tensile shear and cross-tension loads

“…In numerous studies the spot weldability of different automotive grades as DP, TRIP, TWIP etc. are examined in terms of parameter optimization for continuous and pulsed technology considering different loading conditions (static, dynamic, cyclic) [1][2][3][4][5][6]. In general, it is challenging to nd a parameter combination which is ideal for all loading conditions.…”

“…The design of RSW for quasistatic load is generally performed based on tensile shear and cross-tension tests where the optimum parameters are often different for the two testing circumstances. The shear tensile and cross-tension loads can be estimated by standardized and recently developed calculation methods [1,2], although the applied RSW technology has still a crucial role for the nal load bearing capacity of the spot-welded joint.…”