Dynamic properties of three types of wood-based composites

Hu, Yingcheng; Nakai, T.; Gu, Jiyou; Wang, Fenghu

doi:10.1007/s10086-003-0614-y

Cited by 31 publications

(27 citation statements)

References 2 publications

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“…The results indicate that the volume-weighted average grain size, based on the rule of mixtures, captures the response of the material better than the average grain size as the characteristic length of the microstructure. This finding is supported by earlier investigations, where the rule of mixtures has been successfully applied to model grain boundary behaviour [50], elastic properties of multi-phase materials [51], and strength of composites [52,53].…”

Section: Discussionsupporting

confidence: 76%

Influence of grain size distribution on the Hall–Petch relationship of welded structural steel

Lehto

Remes

Saukkonen

et al. 2014

Materials Science and Engineering: A

193

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The strength of polycrystalline metals increases with a decrease in grain size according to the HallPetch relationship. However, heterogeneous microstructures deviate from this relationship depending on the distribution of grain sizes. This paper introduces a rule of mixtures based approach for determining the characteristic length of the microstructure for heterogeneous weld metal. The proposed grain size parameter, the volume-weighted average grain size, is measured experimentally for nine structural steel weld metals and two base materials. The weld metals are found to have a large variety of grain size distributions that are noticeably broader than those of the base material due to differences in phase contents. The results show that the volume-weighted average grain size is able to capture the influence of grain size distribution on the strength of welded structural steel. Based on the experimental results, a modified Hall-Petch relationship is formulated for the strength prediction of heterogeneous microstructures. The modified relationship is also found to be applicable to data from the literature.

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Section: Discussionsupporting

confidence: 76%

Influence of grain size distribution on the Hall–Petch relationship of welded structural steel

Lehto

Remes

Saukkonen

et al. 2014

Materials Science and Engineering: A

193

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“…4c. It has been reported that the dynamic MOE of laminiated composites can be calculated according to the following equation (Hu 2004;Chauhan et al 2005),…”

Section: Results Of Nondestructive Testsmentioning

confidence: 99%

Using Non-Destructive Testing to Determine the Correlation between Dynamic Mechanical Properties and Bonding Strength of Wood-Plastic Composite Adhesive Joints

2015

BioResources

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Wood-plastic composites (WPC) have been developed into new and important wood-based composites because of their benefits for the environment, economy, and recyclability. When combined with structural adhesives, WPCs will have a greatly broadened application in the construction field. In this work, epoxy resin and acrylic ester were used to bond WPC adhesive joints. The shear strength of the adhesive joints was determined and investigated. Resonant frequency and dynamic modulus of elasticity (MOE) of the WPC adhesive joints were measured using the longitudinal vibration method. The correlation between different vibration parameters and shear strength of WPC adhesive joints was also investigated. Results showed that the epoxy resin had a better bonding quality than the acrylic ester on the bonding of WPC adhesive joints. The resonant frequency, dynamic MOE, and the dynamic MOE ratio of the WPC adhesive joints had close correlations with their shear strength for the samples bonded with epoxy resin.

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“…The dynamic Young's modulus Ev was carried out using the longitudinal transmission method [5][6][7]. The sound velocity and dynamic Young's modulus were calculated based on Eq.1 and Eq.2.…”

Section: Nondestructive Testing Methodsmentioning

confidence: 99%

Relationship Between Dynamic and Static Modulus of Elasticity of I-beam

Yu¹,

Chang²,

Jing³

2017

dtetr

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The relationship was analyzed between dynamic and static modulus of elasticity (MOE) of I-beam, the dynamic modulus elasticity was evaluated by vibration wave nondestructive testing (NDT), the static modulus elasticity was evaluated by three point bending test, and I-beam was made of HDPE and poplar flour. The dynamic MOE was evaluated on a FFT system, and the static MOE of the same Specimens measured on the key laboratory of bio-based material science and technology of ministry of Chinese education according to the ASTM standard D 790-03. Results showed that the NDT MOE values overestimated the static MOE from -9.47% to 31.96% depending on the boardwalk type. Regression analysis showed no significant correlation between the dynamic MOE and the Static MOE. These results suggest that the vibration wave NDT technique may not be appropriate to estimate the static MOE of I-beam made from WPC. The trend however needs to be confirmed by further testing.

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Dynamic properties of three types of wood-based composites

Cited by 31 publications

References 2 publications

Influence of grain size distribution on the Hall–Petch relationship of welded structural steel

Influence of grain size distribution on the Hall–Petch relationship of welded structural steel

Using Non-Destructive Testing to Determine the Correlation between Dynamic Mechanical Properties and Bonding Strength of Wood-Plastic Composite Adhesive Joints

Relationship Between Dynamic and Static Modulus of Elasticity of I-beam

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