The welding process parameters of resistance spot are determined by quality indicators, such as nugget diameter, and tensile shear test behavior, failure load location. In this study, deep-learning models were investigated to predict the indicators from base materials parameter information. For each model, hyperparameters, number hidden layers, nodes in layer, learning rate optimizer, epochs, o...

Gaussian Processes (GPs) are often used to predict the output of a parameterized deterministic experiment. They have many applications in the field of Computer Experiments, in particular to perform sensitivity analysis, adaptive design of experiments and global optimization. Nearly all of the applications of GPs to Computer Experiments require the inversion of a covariance matrix. Because this ...

The task of 1.2GPa ultra-high strength steel sheet in short time's high current spot welding has been clarified. High and time system frequency power supply developed. In order to prevent spatter, new double pulse method which primary energization, cooling secondary energization proposed. By using this novel method, nugget diameter tensile shear satisfied the target spatter did not occur. New e...

In order to study the effect of spot welding parameters such as welding force, welding time and welding current intensity on nugget formation and its size in resistance spot welding process of CR3 low carbon steel sheets using ANSYS commercial software package. A 2D axisymmetric electro-thermo-mechanical finite element (FE) model is developed to simulate the nugget forming process and to predic...

Abstract Ever new requirements for the environmental compatibility and safety of products do not stop at automotive industry. This results in ever shorter time windows pre-series processes. For this reason, time-consuming preliminary tests must be minimized to ensure an accelerated start-up production that is as trouble-free possible. maxim applies all parts automobile, but especially body shop...

Ti6Al4V titanium alloy is applied extensively in the aviation, aerospace, jet engine, and marine industries owing to its strength-to-weight ratio, excellent high-temperature properties and corrosion resistance. In order to extend the application range, investigations on welding characteristics of Ti6Al4V alloy using more welding methods are required. In the present study, Ti6Al4V alloy sheets w...

Surface composite layers were successfully fabricated on an A 1050-H24 aluminum plate by dispersed iron (Fe) and magnetite (Fe₃O₄) particles through friction stir processing (FSP). Fe and Fe₃O₄ powders were packed into a groove of 3 mm in width and 1.5 mm in depth, cut on the aluminum plate, and covered with an aluminum sheet that was 2-mm thick. A friction stir processing (FSP) tool of square ...

This paper describes our participation in the MobileClick track of NTCIR-11. We present our methods and results for both iUnit retrieval and summarization. Our ranking methods for the retrieval task are essentially two-step methods in which we first create a model pseudo-nugget, and then promote iUnits that are the most similar to that model pseudo-nugget. Our summarization methods consist in s...

We develop a value range analysis for higher-order programs. The analysis extracts a nugget that characterizes the value bindings resulting from program execution. This abstraction can be fed into a theorem prover to extract non-trivial inductive properties about programs, including the range of values assigned to variables during program execution. The paper incorporates several new technical ...