Finite element analysis of double cantilever beam specimen using a higher order plate theory

An experimental and analytical investigation in cryogenic Mode I interlaminar fracture behavior and toughness of SL-E woven glass-epoxy laminates was conducted. Double cantilever beam (DCB) tests were performed at room temperature (R.T.), liquid nitrogen temperature (77 K), and liquid helium temperature (4 K) to evaluate the effect of temperature and geometrical variations on the interlaminar fracture toughness. The fracture surfaces were examined by scanning electron microscopy to verify the fracture mechanisms. A finite element model was used to perform the delamination crack analysis. Critical load levels and the geometric and material properties of the test specimens were input data for the analysis which evaluated the Mode I energy release rate at the onset of delamination crack propagation. The results of the finite element analysis are utilized to supplement the experimental data.

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Vibration Finite Element Analysis of Bimodular Laminates Using a Higher-Order Plate Theory

Computer-Aided Civil and Infrastructure Engineering ◽

10.1111/j.1467-8667.1993.tb00217.x ◽

2008 ◽

Vol 8 (4) ◽

pp. 317-325

Author(s):

Yi-Ping Tseng ◽

Kung-Pyng Bai ◽

Cheng-Tao Lee

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Plate Theory ◽

Higher Order ◽

Element Analysis

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Shear and foundation effects on crack root rotation and mode-mixity in moment- and force-loaded single cantilever beam sandwich specimen

Journal of Composite Materials ◽

10.1177/0021998317749714 ◽

2018 ◽

Vol 52 (18) ◽

pp. 2537-2547 ◽

Cited By ~ 9

Author(s):

Vishnu Saseendran ◽

Leif A Carlsson ◽

Christian Berggreen

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Energy Release Rate ◽

Energy Release ◽

Cantilever Beam ◽

Release Rate ◽

Beam Specimen ◽

Mode Mixity ◽

Element Analysis ◽

Fracture Specimens

Foundation effects play a crucial role in sandwich fracture specimens with a soft core. Accurate estimation of deformation characteristics at the crack front is vital in understanding compliance, energy release rate and mode-mixity in fracture test specimens. Beam on elastic foundation analysis of moment- and force-loaded single cantilever beam sandwich fracture specimens is presented here. In addition, finite element analysis of the single cantilever beam specimen is conducted to determine displacements, rotations, energy release rate and mode-mixity. Based on finite element analysis, a foundation modulus is proposed that closely agrees with the numerical compliance and energy release rate results for all cases considered. An analytical expression for crack root rotation of the loaded upper face sheet provides consistent results for both loading configurations. For the force-loaded single cantilever beam specimen (in contrast to the moment-loaded case), it was found that the crack length normalized energy release rate and the mode-mixity phase angle increase strongly as the crack length decreases, a result of increased dominance of shear loading.

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