Investigation of the Interlaminar Shear Properties of Fiber Reinforced Polymers via Flexural Testing using Digital Image Correlation.

Determination of the interlaminar properties of laminate composites to date have included a few direct measurement techniques: the standardized short beam test via three-point flexural testing and the double beam shear test via five-point flexural testing. These test methods are limited to a determination of the apparent interlaminar strength, while the full stress-strain behavior cannot be determined. The double beam shear test allows for a calculation of the shear modulus, provided that four additional elastic, in-plane properties have been determined in advance via three additional types of tests.

Toward development of optimum specimen designs and modeling of in-plane uniaxial compression testing of aluminum alloy 2024 and AISI 1008 steel sheet material.

Tension-compression testing is commonly conducted to understand and predict springback during a stamping process. However, large strains are generally difficult to achieve during the in-plane compression portion of the test. Proper specimen design and control of frictional forces are necessary for obtaining large strains.

Insights into Cruciform Sample Design.

Four different cruciform sample designs, based on the work of Abu-Farha et al., were studied in this paper. Key features of this design are a recessed pocket with fillet and re-entrant corners.

Forming limit prediction using a self-consistent crystal plasticity framework: a case study for body-centered cubic materials.

A rate-dependent self-consistent crystal plasticity model was incorporated with the Marciniak-Kuczyński model in order to study the effects of anisotropy on the forming limits of BCC materials. The computational speed of the model was improved by a factor of 24 when running the simulations for several strain paths in parallel. This speed-up enabled a comprehensive investigation of the forming limits of various BCC textures, such as and fibers and a uniform (random) texture.