Sökning: "Lisbeth Hellström"

Hittade 3 avhandlingar innehållade orden Lisbeth Hellström.

1. 1. Fracture processes in wood chipping

   Författare :Lisbeth Hellström; Per Gradin; Torbjörn Carlberg; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wood chipping; chip formation; digital speckle photography; friction; fracture processes; analytical model; Engineering mechanics; Teknisk mekanik;

   Sammanfattning : In both the chemical and mechanical pulping process, the logs are cut into wood chips by a disc chipper before fibre separation. To make the wood chipping process more efficient, one have to investigate in detail the coupling between theprocess parameters and the quality of the chips. LÄS MER

3. 2. On the wood chipping process : a study on basic mechanisms in order to optimize chip properties for pulping

   Författare :Lisbeth Hellström; Torbjörn Carlberg; Per Engstrand; Sören Östlund; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wood chipping; Chip formation; Digital Speckle Photography; Friction; Fracture Processes; Analytical model; Laboratory Wood Chipper; Force Measurement; Vibration Synthesis; Energy Efficiency; Chip Damage; TMP; CTMP; Cellulose and paper engineering; Cellulosa- och pappersteknik;

   Sammanfattning : In both the chemical and mechanical pulping process, the logs are cut into wood chips by a disc chipper before fibre separation. To make the wood chipping process more efficient, one have to investigate in detail the coupling between process parameters and the quality of the chips. LÄS MER

4. 3. Some aspects on the energy dissipation during canter chipping

   Författare :Helen Lusth; Per Gradin; Lisbeth Hellström; Per Isaksson; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : .... LÄS MER