Experimental study on partial compression parallel to grain of solid timber

Totsuka, Marina; Jockwer, Robert; Aoki, Kenji; Inayama, Masahiro

doi:10.1186/s10086-021-01972-w

Cited by 15 publications

(14 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The size effect of the cross-sectional area on the compressive strength f c,0 was very small. We have reported that there is no size effect in the f c,0 of the solid timber specimens [7]. The main reason of the strength reduction may be related to knots because the solid timber specimens did not have knots, whereas all the glulam specimens excluding the 2.5-1 specimens had knots.…”

Section: Size Effects Of Compression Strength and Modulimentioning

confidence: 78%

“…(2) Cedar (H = mm) [7] Cedar (H = mm) [7] Cedar (H = mm) [7] Fig. 8 Influence of heights and widths of cross-sectional area on values of E L,f Fig.…”

Section: Size Effects Of Compression Strength and Modulimentioning

confidence: 99%

“…The main reason of the strength reduction may be related to knots because the solid timber specimens did not have knots, whereas all the glulam specimens excluding the 2.5-1 specimens had knots. [7] for the influence of the heights and with a height of 100 mm and 30-90 mm [7] for the influence of the widths of the loaded area. The E Fig.…”

Section: Size Effects Of Compression Strength and Modulimentioning

confidence: 99%

“…They defined the damage zone as a zone with a high variation strain (0.2-1.7%) at 50% of a maximum strength. In addition, Totsuka et al [7] reported the heterogeneity of the strains of large-sawn-timbers specimens and showed the possibility that the increasing length of damage zone with the increase of the widths of the loaded area and the length of the damage zone does not change when the full height of the specimens increases. The compression strength parallel to the grain of large-scale specimens of glulam is presented by Fryer et al [8] and Flaig et al [9].…”

Section: Introductionmentioning

confidence: 99%

“…Figure8presents the influence of the heights and the widths of the loaded area on the values of E L,f . The test results of solid timber of cedar[7] are also shown in Fig.8. These values indicate mean values of the specimens with a cross-sectional area of 200 × 200 mm and 30 × 30-90 × 90 mm[7] for the influence of the heights and with a height of 100 mm and 30-90 mm[7] for the influence of the widths of the loaded area.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Experimental study of compressive properties parallel to grain of glulam

et al. 2022

View full text Add to dashboard Cite

This paper describes results and analysis of experiment of compression behavior parallel to grain of glulam (Norway Spruce, Japanese cedar, and Japanese cypress), especially in damage zones near loading plates and joints. To investigate the influence factors of physical properties and the mechanism of the damage zone near the loading plates or the joints, compression tests on 90 specimens and surface-measurement tests on 48 specimens were performed. As a result, it was observed that damage zones existed near the loading plates and the joints. The lengths of the damage zone of wood–wood joints are larger than that of wood–steel joints. The length of the damage zone was independent of the load and the height of the specimens. However, the length of the damage zone and its scatter increase as the width of the cross-section increases, as does the roughness on the contact surface. It was considered that the cause of the damage zone is the roughness on the contact surface and the length of the damage zone depends on the roughness on the contact surface. Therefore, the length of the damage zone depends on the processing accuracy on the contact surface and has an increasing trend as the contact-surface area increases. There was the size effect of the height of the specimens on the compressive strength because of knots.

show abstract

Section: Size Effects Of Compression Strength and Modulimentioning

confidence: 78%

“…(2) Cedar (H = mm) [7] Cedar (H = mm) [7] Cedar (H = mm) [7] Fig. 8 Influence of heights and widths of cross-sectional area on values of E L,f Fig.…”

Section: Size Effects Of Compression Strength and Modulimentioning

confidence: 99%

Section: Size Effects Of Compression Strength and Modulimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Experimental study of compressive properties parallel to grain of glulam

et al. 2022

View full text Add to dashboard Cite

show abstract

Evaluation method of compression parallel to grain stiffness in wood and relationship between stiffness and shape of contact surface

Totsuka

2024

Eur. J. Wood Prod.

View full text Add to dashboard Cite

The compressive behavior parallel to the grain is an essential parameter for the designing of multistoried and large timber buildings. However, the application of a compressive force parallel to the grain results in significant deformations near the end grain, which is referred to as the damage zone. Therefore, this study elucidates the mechanism of the damage zone and proposed a methodology to evaluate the properties of the damage zone. The cause of the damage zone was attributed to an uneven contact surface. As the contact surface shape remained non-flat even after reaching 28% of the predicted maximum load, the initial stiffness of compression parallel to the grain necessitated an assessment based on the influence of the damage zone. The Young’s modulus of the damage zone was approximately 2% of that of the middle zone and an evaluation method for the damage zone length was proposed using the strongest link model. The Young’s modulus and damage zone length evaluation methods were used to evaluate the stiffness of the specimens when compressed parallel to the grain. The proposed method could adequately evaluate the experimental values.

show abstract