Svetskommissionen är en teknisk branschorganisation för fogande industri. Vi jobbar med standardisering, forskning och utbildning. Svetskommissionens viktigaste uppgift är att verka för våra medlemmars intressen.

Crash testing - measurement control

Olle Skrinjar

Abstract

In late 2002 a new module was taken into action at IM (Institutet för Metallforskning): The Crash Module. It’s an addition to a standard MTS servo hydralic test machine that will accelerate up to a velocity of 20m/s for high speed testing of specimens.

Different types of joints has been tested and also pure material behaviour at elevated strain rates.

In finite element calculation it’s of most importance to use correct material data. Most often will a true strain and true stress curve from experiment be sufficient. These data can be obtained from the crash module at different strain rates. From several gauges and measurements there will be different errors in obtaining the data, both systematic and random errors, that will influence the final result. From finite element and error analysis it is found that the true strain will have a standard uncertainty of u(ε) = ±0.001917 % and the true stress will have a standard uncertainty of be u(σtrue) = ±0.64 % for reported loadcase. Different ways to evaluate and to correct errors are discussed.

PDF

Senast ändrad av: Peter Hjertsson
26 mars 2015

 


Bli medlem

Medlemskapet i Svetskommissionen säkrar dina möjligheter till ökad lönsamhet.

1. Kostnadsfri rådgivning
2. Information om standarder
3. Fogningstekniskt nätverk
4. Tidningen Svetsen

Börja här

Kontakta oss

Besöksadress:
Grev Turegatan 12A
Visa på kartan ›

Postadress:
Box 5073
102 42 Stockholm

Telefon, växel:
08-120 304 00

E-post:
info@svets.se

Svetskommissionen  Box 5073, 102 42 Stockholm  Tel: 08-120 304 00  E-post: info@svets.se