The purpose of the software is to streamline the process to obtain fracture toughness from double cantilever beam (DCB) tests. The program analyzes a series of images, looking for the crack tip. Once the crack length has been determined throughout the test, the program then generates compliance plots and calculates the fracture toughness using t…

2021年6月22日 · Convenient and easy-to-use analytical corrections for DCB tests are obtained, which avoid the complexity and difficulty of the elastic foundation approach, and the need for multiple experimental measurements of DCB compliance and crack length. The corrections are, to the best of the authors’ knowledge, completely new.

2019年1月1日 · The method combines the virtual crack closure technique (VCCT) with the cohesive zone modelling (CZM) on the finite element basis to take into account the development of fracture toughness. The method is applied to simulate a double cantilever beam (DCB) test as …

Automatic crack tracking in DCB specimens via edge detection software and an overhead CCD camera is simple, reliable, and accurate. Automatic tracking provides a more continuous crack length data set with superior spatial resolution of 0.15 mm (1 pixel) compared with the accepted standard with 5-mm crack delineation spacing and ±0.5 mm ...

The tapered double cantilever beam (TDCB) test geometry (Fig. 6.18) ensures that the change in compliance is independent of the crack length (i.e. constant compliance). It is used for Mode I testing of adhesives with metallic adherends and is well suited to tests where the crack length is difficult to measure, especially environmental testing.

A set of methods for evaluating the resistance curve (R-curve) behaviour of double cantilever beam (DCB) and end notch flexure (ENF) test specimens. Unlike traditional methods, these techniques do not require the crack tip to be tracked during testing, simplifying experimental setups and data processing.

The purpose of the software is to streamline the process to obtain fracture toughness from double cantilever beam (DCB) tests. The program analyzes a series of images, looking for the crack tip.

Because the CZM is bi-linear, the analytical solutions are given separately in three phases, namely (i) linear-elastic behaviour before crack propagation, (ii) damage growth before crack propagation and (iii) crack propagation.

The ligament between the main crack and the edge crack (“leaf spring”, or “bridge”) absorbs part of the wedge force, impeding crack growth. This tends to give shorter cracks and false, high values of KIssc. Though most errors are much smaller, errors as high as …

Several benchmark tests regarding irregular discretizations are performed, and the results indicate that the CE method is capable of naturally capturing complicated crack patterns in dynamic ...