Experiments on cracks under spatial loading
The basic loading cases (Mode I,Mode II and Mode III) of cracks are generally defined by the near-field solutions for the stress distribution at the crack front.Cracks,whose stress near fields are symmetric due to geometry and/or loading of the structure,are called Mode I-cracks.In case of spatial loaded cracks the stress fields near the crack tip are unsymmetrical.The fracture mechanical treatment of such Mixed-Mode-loaded cracks is consequently more complicated as of pure Mode I-loaded cracks.For experimental investigations of 3D-Mixed-Mode-loaded cracks the CTSR-specimen (Compact-Tension- Shear-Rotation-specimen) will be proposed.The CTSR-specimen with the corresponding loading device enables the generation of pure Mode I,pure Mode II,pure Mode III and several combinations of the three basic fracture modes.In this paper the CTSR-specimen,the loading device and various experimental results for fracture and fatigue loading situations are illustrated.Furthermore these results will be compared with existing fracture criteria for 3D-Mixed-Mode-problems.
3D-Mixed-Mode fracture fatigue CTSR-specimen
Hans A. Richard Alexander Eberlein Nils-H. Schirmeisen
Institute of Applied Mechanics,University of Paderborn,33100,Germany WINDMOELLER & HOELSCHER KG,Lengerich,49525,Germany
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）