Fracture energy

Xem 1-6 trên 6 kết quả Fracture energy

Some recent criteria for brittle fracture assessment under mode II loading

$Some recent criteria for brittle fracture assessment under mode II loading$

Different criteria are available in the literature to assess the fracture behaviour of sharp V-notches. A typical and well-known criterion is based on the application of the notch stress intensity factors (NSIFs), which are able to quantify the intensity of the stress fields ahead of the notch tip.

8p tohitohi 19-05-2020 12 1 Download

Notched plates in mixed mode loading (I+II): a review based on the local strain energy density and the cohesive zone model

Two procedures to evaluate fracture resistance of notched components are proposed in this contribution: the Strain Energy Density (SED) over a control volume and the Cohesive Zone Model (CZM). With the aim to simplify the application of the two fracture criteria, the concept of the ‘equivalent local mode I’ is presented.

8p tohitohi 19-05-2020 15 1 Download

Review of local strain energy density theory for the fracture assessment of V-notches under mixed mode loading

$Review of local strain energy density theory for the fracture assessment of V-notches under mixed mode loading$

The present work summarizes some recent experimental, theoretical and numerical results on brittle fracture of isostatic polycrystalline graphite. The analyses have been carried out on V-notched samples under mixed mode (I+II), torsion and compression loading, considering various combinations of the notch tip radius, opening angle and notch tilt angle.

20p tohitohi 19-05-2020 21 1 Download
Tensile fracture analysis of blunt notched PMMA specimens by means of the Strain Energy Density

$Tensile fracture analysis of blunt notched PMMA specimens by means of the Strain Energy Density$

In this paper, a volume criterion based on a simple scalar quantity, the mean value of the strain energy (SED), has been used to assess the static strength of notched components made of Polymethylmethacrylate (PMMA).

8p tohitohi 19-05-2020 19 1 Download
Impact response of glass/epoxy laminate interleaved with nanofibrous mats

Variation of the impact characteristics such as maximum contact load, maximum deﬂection, maximum contact time, absorbed energy are depicted in the ﬁgures. The results showed that PVDF nanofibers are not a good choice for toughening epoxy and improving impact damage resistance of GFRP.

6p tohitohi 19-05-2020 12 2 Download
Fractography P2

Cleavage is a low-energy fracture that propagates along well-defined low-index crystallographic planes known as cleavage planes. Theoretically, a cleavage fracture should have perfectly matching faces and should be completely flat and featureless. However, engineering alloys are polycrystalline and contain grain and subgrain boundaries, inclusions, dislocations, and other imperfections that affect a propagating cleavage fracture so that true, featureless cleavage is seldom observed.

10p lyacau 28-12-2009 81 5 Download