Use of the Iosipescu test for the identification of shear damage evolution laws of an orthotropic composite

• The experimental evaluation of the shear response of fibre-reinforced plies is a requirement for accurate material models predicting progressive damage. In the first part of the paper, the quality of the Iosipescu shear test is investigated with full-field strain measurements and finite element analyses. In the second part, the in-plane and through-thickness shear response of an orthotropic carbon/epoxy uni-weave non-crimp fabric composite are compared, and the stress–strain curves used as input for two continuum damage mechanics models. Both models were able to predict accurately the nonlinear shear behaviour of the material. The model parameters and the damage evolution laws could easily be extracted from cyclic Iosipescu tests.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Composite Science and Engineering (hsv//eng)

Keyword

Continuum damage mechanics CDM

Fabrics/textiles

Finite element analysis (FEA)

Shear testing

Thermosetting resin

Carbon

Continuum damage mechanics

Damage detection

Elasticity

Thermosets

Continuum damage mechanics model

Experimental evaluation

Full-field strain measurement

Non-crimp fabric composites

Orthotropic composites

Through-thickness shears

Finite element method

Publication and Content Type

ref (subject category)

art (subject category)