Cost Oriented Object-Related Damage Analysis with the Ultrasonic Method for Small Steel Bridges

Author(s):  
Thomas Krausche ◽  
Hartmut Pasternak
2021 ◽  
Vol 351 ◽  
pp. 01026
Author(s):  
Sebastian Karolewski ◽  
Sylwester Borowski ◽  
Karolina Karolewska

The paper presents the applications of glued joints in many industry branches. The advantages and disadvantages of glued joints as well as the methods of detecting weld damage are presented. The methods of damage analysis to the glued joints were divided and explained. The most important detection techniques are the X-ray method, the ultrasonic method, the Laser Ultrasound method, the guided wave method, the electromechanical impedance method and the active thermography method. The advantages and limitations that may allow for the proper selection of the research method depending on the diagnosed material and the conditions accompanying the study were indicated.


2006 ◽  
Vol 137 ◽  
pp. 219-222 ◽  
Author(s):  
W. Marczak ◽  
T. Kowalska ◽  
M. Bucek ◽  
D. Piotrowski ◽  
M. Sajewicz
Keyword(s):  

Author(s):  
Harold James

The history of Krupp is the history of modern Germany. No company symbolized the best and worst of that history more than the famous steel and arms maker. This book tells the story of the Krupp family and its industrial empire between the early nineteenth century and the present, and analyzes its transition from a family business to one owned by a nonprofit foundation. Krupp founded a small steel mill in 1811, which established the basis for one of the largest and most important companies in the world by the end of the century. Famously loyal to its highly paid workers, it rejected an exclusive focus on profit, but the company also played a central role in the armament of Nazi Germany and the firm's head was convicted as a war criminal at Nuremberg. Yet after the war Krupp managed to rebuild itself and become a symbol of Germany once again—this time open, economically successful, and socially responsible. This book presents a balanced account, showing that the owners felt ambivalent about the company's military connection even while becoming more and more entangled in Germany's aggressive politics during the imperial era and the Third Reich. By placing the story of Krupp and its owners in a wide context, this book also provides new insights into the political, social, and economic history of modern Germany.


2020 ◽  
Vol 2020 (1) ◽  
pp. 34-52
Author(s):  
Rafał Szymański

AbstractThe article is in line with the contemporary interests of companies from the aviation industry. It describes thermoplastic material and inspection techniques used in leading aviation companies. The subject matter of non-destructive testing currently used in aircraft inspections of composite structures is approximated and each of the methods used is briefly described. The characteristics of carbon preimpregnates in thermoplastic matrix are also presented, as well as types of thermoplastic materials and examples of their application in surface ship construction. The advantages, disadvantages and limitations for these materials are listed. The focus was put on the explanation of the ultrasonic method, which is the most commonly used method during the inspection of composite structures at the production and exploitation stage. Describing the ultrasonic method, the focus was put on echo pulse technique and the use of modern Phased Array heads. Incompatibilities most frequently occurring and detected in composite materials with thermosetting and thermoplastic matrix were listed and described. A thermoplastic flat composite panel made of carbon pre-impregnate in a high-temperature matrix (over 300°C), which was the subject of the study, was described. The results of non-destructive testing (ultrasonic method) of thermoplastic panel were presented and conclusions were drawn.


Author(s):  
J Downing ◽  
A Hook

Two steel substrate test panels were developed to represent common plate thicknesses found on naval vessels and scanned using the Babcock developed ultrasonic technique. One sample comprised of a series of slotted surface breaking flaws of varying widths and through thicknesses to represent fracturing/cracking. The inspection method detected simulated cracking to a depth of 2mm and 0.5mm in width. The second sample included numerous loss of wall thickness areas of varying diameters and through thicknesses, with the smallest detectable loss of wall thickness being 0.1mm at a 15mm diameter. After proving confidence in detection, there was a need to characterise flaws to provide support and ascertain a repair action. Samples were produced that were subjected to either impact or heat exposure to induce realistic representative damage. The practical ultrasonic method was successfully used to independently characterise between the samples, with induced de-laminations caused by blisters, and multi layered matrix cracking caused by varying levels of projectile impacts, due to their unique morphology.


Author(s):  
Shirley García ◽  
Thairon Reis ◽  
Auteliano Antunes dos Santos Junior

2002 ◽  
Vol 86 (16) ◽  
pp. 125-133
Author(s):  
Frank Rapattoni
Keyword(s):  

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