Analysis of Mechanical Behavior through Digital Image Correlation and Reliability of Pinus halepensis Mill.

Abstract

The mechanical behavior of test pieces extracted from two specimens of Pinus halepensis Mill., from the same geographical area and close to each other, was examined in this study. Using a methodology based on Digital Image Correlation (DIC) and implemented during compression strength testing, the modulus of elasticity in compression parallel to the grain (MOEc) was obtained. In addition, the value of compressive strength (MORc) was obtained for this type of wood. The research was complemented with a reliability study, determined using the Weibull modulus, from the MORc values. A microstructural and behavioral study of the most representative pieces after failure was also conducted to correlate breakage with the behavior of the pieces during the tests monitored by DIC, to link both studies. DIC was shown to be an ideal and low-cost technique for the determination of the studied properties, and obtained average values of MOEc of 50.72 MPa and MORc of 9693 MPa. These values represent fundamental data for design and calculations of wooden structures. A reliability value of between 11 and 12 was obtained using the Weibull modulus for this type of wood.

Numerical identification of the elasticity tensor of heterogeneous materials made of Silicon Carbide and Titanium by the Finite Element Model Updating (FEMU)

“…Indeed each material is governed by constitutive material parameters that compose the elastic constitutive law. Determining the coefficients of the elastic constitutive law of a material has been made possible by the methods of non-contact field measurements such as Digital Image Correlation (DIC) [1,2] which is the one most used in an inverse process to identify constitutive material parameters.…”

Investigation of the accuracy of Digital Image Correlation (DIC) in measuring full-field strain for timber materials

“…However, there are fewer investigations on timber using DIC. This may be due to the orthotropic nature of timber, the complexity and uncertainty of determining its mechanical properties compared to other materials [17]. Timber is typically considered to be an anisotropic material.…”

Applying Digital Image Correlation (DIC) Techniques to Characterise Plywood According to UNE-EN 314 Standards: Bonding Quality Tests

“…For physical loading, Kang et al [14,15], Peng et al [16], Lanvermann et al [17] and García et al [18] used it to measure moisture-induced and shrinkage deformations in drying wood, while Oscarsson et al [19] applied it to assess the distribution of deformations around knots after consecutive load/unload cycles. For mechanical loading, Villarino et al [20] correlated the Young's modulus evolution of Pinus halepensis wood under compression with the microstructural behaviour observed after breakage, and Li et al [21] analysed the influence of wood type (early-and latewood) and relative humidity on the bonding strength and strain distribution of glued wood, observing either glue line or early wood failures.…”