Abstract
To enhance the performance of spot weld joints, various improvement methods are used to strengthen the properties of welded joints. Spot welding process is very well suited for welding of various steels grades. Regression analysis is the statistical modeling technique, and it is suitable for predicting strength of welded joints. It is valuable for quantifying the impact of various loading types upon a spot weld rupture.In the present study quantification of impact strength of spot welded EHSS steel, Mild Steel (DC05) and AHSS (DP780) were carried out, by developing the regression models. The analysis includes Material, Thickness, Test type, Test Speed as process parameters. The complete analysis will be helpful in deciding the best combinations for desired performance characteristics. Taguchi technique revealed that the impact speed is the most significant factor in weld strength followed by thickness and material grade.
Highlights
The joining method has high share of costs in product manufacture and has Impact that a link failure for the functionality of the product in various industries
Lin et al (1998) have studied the ultimate tensile strength of resistance spot welds in mild steel subjected to combined loading tension and shear loads
Coupon tests were selected from a database maintained by the NAIR WSU based on the previous studies for Mild Steel (DC05), and EHSS steel (ASTM international, 2003)
Summary
The joining method has high share of costs in product manufacture and has Impact that a link failure for the functionality of the product in various industries. Some information is available from Donders, Brughmans, Hermans, and Tzannetakis (2005) and Schweizerhof, Schmid, and Klamser (2000) gives recent modeling information on spot weld process as well as the advantages of using spot weld compared with the most common joining techniques. Several investigations are reported with respect to the behavior and modeling of spot weld in steel. Lin et al (1998) have studied the ultimate tensile strength of resistance spot welds in mild steel subjected to combined loading tension and shear loads. A welded structure usually represents a weakness in various strength and surface hardness at weld. These low properties are limiting the use welded joints in the design of structural components. In its own the experiment was taken into account the strength of welds in normal, bending and shear
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