Controlled, uniform, peening has been used to impose precise cov onto mild steel plate specimens. This was achieved by using an the specimens under a single, precision-loaded, 2mm diameter studies have revealed a surprising relationship between percent surface residual stress. Stress increases almost linearly with low coverages but reaches a maximum at about 80% coverage. At 100% coverage the i...

In this research, the incremental slitting method was employed to determine throughthickness residual stress profile of a carbon/epoxy laminate. The method involves measuring strains at the back surface of the stressed specimen, while a narrow slit is cut by a CNC milling machine progressively from the top surface of the specimen. "Pulse Method" was selected as the computational approach for th...

Welding is a reliable and effective metal fabrication process which is widely used in industries. High heating at a one location during welding and further rapid cooling generates residual stress and distortion in the weld and base metal. In last few decades various research efforts have been directed towards the control of welding process parameter aiming at reducing residual stress and distor...

A quantitative method to determine the profile of the residual stress along the depth of a highly boron doped silicon film is reported. First, the stress profile relative to the stress at the neutral surface of the film is obtained by measuring deflection of p silicon cantilevers with different etch depths. Second, the average of the residual stress is obtained by using a rotating beam structur...

Computational Welding Mechanics, CWM, can not only be used for RSDP, Residual Stress and Distortion Prediction [1]. It can also be used for a broad range of applications such as remaining life time analyses of reactors, pressure vessels, boilers, furnaces, tubeand pipe systems. As well as the Manufacturing Engineering process of integrated metallic structures that is the engineering discipline ...

Experimental investigation and numerical simulation of the influence of the strain rate in laser forming are presented. To isolate and effectively study the strain rate effects, which are temperature dependent, a "constant peak temperature" method is developed with the aid of numerical modeling and solution. Under the condition of the constant peak temperature, the effects of strain rate on for...

The process of laser beam transformation hardening is principally controlled by two independent parameters, the absorbed laser power on a given area and the interaction time. These parameters can be transformed into two functional parameters: the maximum surface temperature and the hardening depth. It has been proved that with a constant hardening depth the results (hardness. residual stress. e...

Brittle parts of ceramic/metal assemblies are subjected to a residual stress field generated by the fabrication. During that process, cracks are initiated and the key question is whether they propagate through the whole brittle part. The use of classical probabilistic fracture models applied to the ceramic (i.e., based on a weakest link hypothesis), allow one to conclude that cracks are likely ...

A problem of thermally-induced residual stress under plane strain constraint is considered based on a Body Force Method (BFM). As a numerical example, a simple problem of limited plasticity due to a uniform strength of transient line heat source of finite width, which is applied to a surface of a semi-infinite solid for a short duration of time, was considered. Although the out-of-plane compone...