材料一般力学性能测试试验----国外基于数学图像相关法的各个学科研究情况

材料一般力学性能测试试验

Three-Dimensional Digital Image Correlation of a Composite Overwrapped Pressure Vessel During Hydrostatic Pressure Tests

Duane M. Revilock, Jr.Glenn Research Center, Cleveland, Ohio John C. Thesken Ohio Aerospace Institute, Brook Park, Ohio Timothy E. Schmidt Trilion Quality Systems, West Conshohocken, Pennsylvania Bradley S. Forsythe Honeywell Technology, Las Cruces, New Mexico

Strain field measurement of filament-wound composites at ±55[1] using digital image correlation: An approach for unit cells employing flat specimens

M. Torres Arellano a,*, L. Crouzeix a, B. Douchin a, F. Collombet a, H. Hernández Moreno b,

J. González Velázquez ca Université de Toulouse, INSA, UPS, ICA (Institut Clément Ader), 133 C Av. de Rangueil, F-31077 Toulouse, France b Instituto Politécnico Nacional, ESIME Unidad Ticomán, Av. Ticoman 600, C.P. 07340, México D.F., Mexico c Instituto Politécnico Nacional, ESIQIE-GAID, UPALM Edif. 8, C.P. 07300, México D.F., Mexico

复合材料性能试验

符合材料编织物全场应变Full field strain registration in textiles, Yingbo Zhu,Promotor: S.V.Lomov,Leuven 2004



碳纤维孔的强度试验

Strength of CFRP open hole laminates made from NCF, TFP and braided preforms under cyclic tensile loading
K. Uhlig*1, A. Spickenheuer1, K. Gliesche1 and I. Karb2， Plastics, Rubber and Composites 2010 VOL 39 NO 6 247

Fracture behavior of low-density replicated aluminum alloy foams(泡沫铝) E. Amsterdama, R. Goodallb,1, A. Mortensenb, P.R. Oncka, J.Th.M. De Hossona,∗a Department of Applied Physics, Netherlands Institute for Metals Research and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands b Ecole Polytechnique F´ed´erale de Lausanne (EPFL), Laboratory for Mechanical Metallurgy, Institute of Materials, Station 12, CH-1015 Lausanne, Switzerland

Tensile tests have been performed on replicated aluminum alloy foams of relative density between 4.5% and 8%. During the test the electrical resistance was measured with a four-point set-up and the displacements along the gage sectionwere measured using a digital image correlation (DIC) technique. Right from the start of the tensile test, the strain as observed at the surface with DIC is not uniformly distributed over the sample, but concentrates in bands; this is attributed to density variations. The peak strain, i.e. the strain at the ultimate tensile strength (UTS), increases with decreasing density for densities below 5.5%. For densities above 5.5% fracture occurs in the band with the highest strain, yielding a roughly constant peak strain (near 1.5%). Resistivity data indicate an increased contribution of strut bending compared to stretching for densities below 5.5%, causing a decreased rate of damage accumulation and an increase in the tolerance to damage. Incremental strain maps show that the increased damage tolerance in the low-density samples allows initially formed deformation bands to harden resulting in multiple bands to be involved in the fracture process.