Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Internal stresses in the cross-grain direction in glulam induced by climate variations

In English

Författare

  • Johan Jönsson

Summary, in English

Results are presented from an experimental investigation to determine internal stress states perpendicular to grain in glulam induced by moisture variations. The stresses are determined by measuring the released strains before and after cutting. Stress distributions are determined for specimens seasoned in constant humidity, specimens exposed to an artificial single climate change, specimens exposed to cyclic climate change and for specimens exposed to natural climate outdoors under shelter. Results for seasoned specimens show that internal stresses exist in glulam without the presence of moisture gradients. Stresses in specimens with an induced moisture gradient become larger when moistening from a specific climate A to another climate B than when drying from B to A. Tests in an outdoor sheltered climate show large variations in strains and stresses. The tensile stress level in the inner part of the glulam cross section exceeds the characteristic strength of 0.5 MPa during a period of approximately 80 days.

Publiceringsår

2004

Språk

Engelska

Sidor

154-159

Publikation/Tidskrift/Serie

Holzforschung

Volym

58

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

De Gruyter

Ämne

  • Building Technologies

Nyckelord

  • slicing
  • cross-grain direction
  • released deformation
  • contact free measuring technique
  • glulam
  • internal stress
  • moisture gradients
  • technique
  • KstrWood

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1437-434X