A survey of test methods for multiaxial and out-of-plane strength of composite laminates

Abstract

To cite this version:Robin Olsson. A survey of test methods for multiaxial and out-of-plane strength of composite laminates.Composites Science and Technology, Elsevier, 2011, 71 (6) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. and other textile systems. Tubular and cruciform specimens can provide arbitrary inplane loading, while off-axis and angle-ply specimens provide specific biaxial loadings.Tensile and compressive out-of-plane strength may be determined by axial loading of specimens with a waisted gauge section, while bending of curved specimens allow determination of the out-of-plane tensile strength. Tests suited for out-of-plane shear strength include the short beam shear test, the inclined double notch test and the inclined waisted specimen. Testing of arbitrary tri-axial stress states using tubular or cruciform specimens with superimposed through-the-thickness loading is highly complex and significant problems have been reported in achieving the intended stress states and failure modes. Specific tri-axial stress states can be obtained by uniaxial loading of specimens with constrained expansion, as in the die channel test.

A new specimen geometry to determine the through-thickness tensile strength of composite laminates

“…A good overview of the available test methods was given by Broughton [3] and Olsson [4]. The through-thickness tensile strength R t 33 can be determined by tensile tests on waisted block specimens, which are usually bonded to metallic load introduction parts like the one developed by Ferguson et al [5].…”

Effect of through-thickness compression on in-plane tensile strength of glass/epoxy composites: Experimental study

“…With the increasing use of composite materials, biaxial or multiaxial stress states can often be found in structural elements. Therefore, the need to deal with a response of composite structures to complex loading conditions becomes more important [3,4].…”

Mechanism based nonlinear constitutive model for composite laminates subjected to large deformations

“…Other data was not available. Some possible test setups for evaluation of further multi-axial stress states, especially mechanical tri-axial tests, are shown in [21], but no data determined from experimental results is currently available. However, for the consideration of in-plane stress states as subjected within this experimental and numerical study, bi-axial test data is sufficient.…”