Search for dissertations about: "Oskar Tofeldt"

Found 2 swedish dissertations containing the words Oskar Tofeldt.

  2. 1. Lamb wave evaluation of concrete plates

    Author : Oskar Tofeldt; Teknisk geologi; []
    Keywords : Lamb waves; guided waves; impact-echo; concrete; non-destructive evaluation;

    Abstract : This thesis is about the application of Lamb waves for non-destructive evaluation of plate-like concrete structures under one-sided access test condition using a portable equipment consisting of an accelerometer and impact hammer. With this type of equipment and based on array signal processing, the impact-echo (IE) method can be extended with measurements of surface waves; this extension allows an evaluation with Lamb waves. READ MORE

  4. 2. Ultrasonic testing of components produced with additive manufacturing : Towards improved detection and classification of defects

    Author : Mikael Sahl; Håkan Wirdelius; Erik Lindgren; Oskar Tofeldt; Madis Ratassepp; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Non-Destructive Testing NDT ; Super alloys; Microstructure; Ultrasonic Testing UT ; Productivity Enhancement; Production Technology; Produktionsteknik;

    Abstract : The focus in this work is on the use of ultrasonic testing as a method for inspecting components manufactured through additive manufacturing (AM) processes. The research is rooted in the need for effective non-destructive testingtechniques that can adapt to the unique challenges posed by AM-produced materials, including complex defect geometries and surface conditions. READ MORE