Abstract
During fracture of membranes loading often produces buckles above and below the crack
surface. This changes the stress state surrounding the crack-tip and stresses in the
neighbourhood of the crack-tip posses a weaker singularity than r
-1/2. As a result, fracture
occurs when the crack-tip stress distribution is different as compared with that when buckling
is artificially prevented. Therefore the conditions for transfer of lab results to real structures
are changed. The weaker singularity is here utilised to formulate an adopted fracture
mechanical theory. An approximate application is made based on an assumption that the
buckled area of the paper is incapable of carrying load. This region is approximated with the
region that is under compressive load at plane stress conditions. The result is compared with
experiments performed on paper. The importance of the linear extent of the process region
has on the energy available for fracture is discussed.
surface. This changes the stress state surrounding the crack-tip and stresses in the
neighbourhood of the crack-tip posses a weaker singularity than r
-1/2. As a result, fracture
occurs when the crack-tip stress distribution is different as compared with that when buckling
is artificially prevented. Therefore the conditions for transfer of lab results to real structures
are changed. The weaker singularity is here utilised to formulate an adopted fracture
mechanical theory. An approximate application is made based on an assumption that the
buckled area of the paper is incapable of carrying load. This region is approximated with the
region that is under compressive load at plane stress conditions. The result is compared with
experiments performed on paper. The importance of the linear extent of the process region
has on the energy available for fracture is discussed.
| Original language | English |
|---|---|
| Publication status | Published - 2005 |
| Externally published | Yes |
| Event | ECF15-the 15th European Conference of Fracture - Advanced Fracture Mechanics for Life and safety Assessments, Stockholm, August 11-13 - Stockholm, Sweden Duration: 2004 Aug 11 → 2004 Aug 13 |
Conference
| Conference | ECF15-the 15th European Conference of Fracture - Advanced Fracture Mechanics for Life and safety Assessments, Stockholm, August 11-13 |
|---|---|
| Country/Territory | Sweden |
| City | Stockholm |
| Period | 2004/08/11 → 2004/08/13 |
Subject classification (UKÄ)
- Physical Sciences
- Mathematics