Dynamic Characteristics of Cooked and Softened Wood Based on Fiber Dissociation

XU Wei; TIAN Ye

doi:10.19554/j.cnki.1001-3563.2025.13.009

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (13) : 80-87. DOI: 10.19554/j.cnki.1001-3563.2025.13.009

Advanced Materials

Dynamic Characteristics of Cooked and Softened Wood Based on Fiber Dissociation

XU Wei, TIAN Ye

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Abstract

With different structured woods as the research object, the work aims to study the dynamic characteristics of wood raw materials after cooking and softening. The high strain rate (400, 700 and 1 000 s^-1) loading tests were carried out on the specimens of ring-porous wood elm, loose-porous wood poplar and non-porous wood pinus sylvestris after cooking and softening, and the dynamic characteristics of the three kinds of woods after cooking and softening were analyzed. The small specimens dissociated for the three kinds of softened test materials by radial and tangential loading were mainly elongated rods, while the small specimens dissociated by axial loading were mainly short and coarse blocks. It was easy to dissociate under tangential and radial loading, but difficult to dissociate under axial loading. The ring-porous elm was the most difficult to dissociate, and the non-porous pinus sylvestris was the easiest to dissociate. The stress-strain relationship of the three test materials consisted of two parts including linear elastic stage and weak linear strengthening stage after yield. The compressive strength of the three test materials increased with the increase of strain rate. The compressive strength of the loose-porous wood poplar specimen was the smallest, and the compressive strength of the ring-porous wood elm was the largest. The degree of difficulty in the dissociation of wood raw materials after cooking and softening is positively correlated with the strain rate and the uniformity of the internal structure of the test material, and negatively correlated with the density of the test material. After cooking and softening, the dynamic characteristics of the ring-porous material, the loose-porous material and the non-porous material are sensitive to strain rate.

Key words

wood / fiber dissociation / cooking and softening / different structures / dynamic characteristics

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XU Wei, TIAN Ye. Dynamic Characteristics of Cooked and Softened Wood Based on Fiber Dissociation[J]. Packaging Engineering. 2025, 46(13): 80-87 https://doi.org/10.19554/j.cnki.1001-3563.2025.13.009

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