Fatigue in bamboo

Keogh, Lauren; O’Hanlon, Patrick; O’Reilly, Peter; Taylor, David

doi:10.1016/j.ijfatigue.2015.02.003

Cited by 31 publications

(12 citation statements)

References 11 publications

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“…Natural fibre-reinforced composites, such as the tibia cuticle, are well known for their light weight, high structural integrity, reasonable stiffness, strength and toughness (Mayer and Sarikaya, 2002;Dirks and Taylor, 2012;Keogh et al, 2015). However, the behaviour of such composites under loading is also influenced by their fibre orientation (Laranjeira et al, 2010;Martinie and Roussel, 2011).…”

Section: Discussionmentioning

confidence: 99%

How does a slender tibia resist buckling? The effect of material, structural and geometric characteristics on the buckling behaviour of the hindleg tibia in the postembryonic development of the stick insectCarausius morosus

Schmitt

Büscher

Gorb

et al. 2017

Journal of Experimental Biology

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During the lifespan of the stick insect , their long and narrow tibiae experience substantial compressive loads. The mechanical load on the tibiae increases as the weight of the insect rises. The increase in body weight is accompanied by a notable increase in the insect's body size and, accordingly, by an increase in the length of the tibiae. Both of these changes can raise the risk of buckling of the tibiae. In this study, we tracked changes in the material and geometric properties of the hindleg tibia of during growth. The results show that although buckling (either by Euler buckling or local buckling) is the dominant failure mode under compression, the tibia is very capable of maintaining its buckling resistance in each postembryonic developmental stage. This is essentially the result of a compromise between the increasing slenderness of the tibia and its increasing material stiffness. The use of an optimal radius to thickness ratio, a soft resilin-dominated core, and chitin fibres oriented in both longitudinal and circumferential directions are presumably additional strategies preventing buckling of the tibia. This study, providing the first quantitative data on changes in the biomechanical properties of cuticle during the entire life of an insect, is expected to shed more light on the structure-property-function relationship in this complex biological composite.

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Section: Discussionmentioning

confidence: 99%

How does a slender tibia resist buckling? The effect of material, structural and geometric characteristics on the buckling behaviour of the hindleg tibia in the postembryonic development of the stick insectCarausius morosus

Schmitt

Büscher

Gorb

et al. 2017

Journal of Experimental Biology

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“…The resulting gradient distribution of the vascular bundles along the thickness direction was mainly responsible for the exhibited anisotropic fatigue response, including fatigue life, hysteresis loops and residual stiffness. The investigation in [ 24 ] revealed that bamboo displays fatigue when loaded perpendicular to the fibers, but not when loaded parallel to the fibers.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Mechanical and Hygroscopic Properties of Individual Canes of Reed

2021

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The search for sustainability has led to the utilization of more ecological materials with at least, a similar structural performance to those used at present. In this regard, reed fits the environmental and structural requirements as it is a sustainable and biodegradable lignin-cellulose material with remarkable mechanical properties. This research confirms the reed’s structural efficiency as it demonstrates that it has excellent strength and stiffness in relation to its density. The reed anisotropy has a large impact on its properties. Indeed, the strength and stiffness parallel to the fibers are clearly higher than in the perpendicular direction. The results confirm that strength and stiffness decrease with the moisture content and nodes act as reinforcement in compression and bending. If compared with steel, timber and concrete, the reed possesses the highest value for strength. Hence, reed constitutes a strong candidate for environmentally friendly engineering.

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“…The investigation about shrinkage of bamboo is not well documented in the literature. Even though finite element method (FEM) has been widely applied in the investigation of macro-structural behavior of bamboo culms [ 29 , 30 , 31 , 32 , 33 , 34 , 35 ], its use to analyze crack growth emanating from climatic variations in such material remains unavailable to this date. Few studies have used the heat transfer analysis in FEM to analyze the effect of change in MC given the similarity which prevails between heat transfer and moisture transfer [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Underlying Effect of Thermal Modification on Shrinkage Behavior of Bamboo Culm by Experimental and Numerical Methods

et al. 2021

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This study probes into the root cause of split in thermally modified bamboo culm by investigating the underlying effect of thermal contraction with respect to its orthotropic nature by experimental and numerical methods while concurrently monitoring the chemical variation of its structure by Fourier transformed infrared spectroscopy (FTIR). In first part of this study, a non-linear increase in dimensional and weight changes of small clear bamboo specimens were observed with increasing temperature. The dimensional changes in the radial and tangential directions significantly exceeded that in the longitudinal direction. From FTIR results, shrinkage effect between 150 °C to 200 °C was associated with weight loss engendered by reduction in weakly bound water and increase in desorption of water content while alteration of its mechanical properties was attributed to changes in cellulose, hemicellulose, and lignin. From results of finite element method (FEM), the graded variation in thermal expansion coefficient, which showed the formation of a narrowed region of strain concentration corresponding to longitudinal crack propagation, was associated with the inducement of internal forces, namely tensile and compressive forces, at specific regions along the culm length. The results of this study can be useful to achieve optimized durability in modified bamboo for construction.

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Fatigue in bamboo

Cited by 31 publications

References 11 publications

How does a slender tibia resist buckling? The effect of material, structural and geometric characteristics on the buckling behaviour of the hindleg tibia in the postembryonic development of the stick insectCarausius morosus

How does a slender tibia resist buckling? The effect of material, structural and geometric characteristics on the buckling behaviour of the hindleg tibia in the postembryonic development of the stick insectCarausius morosus

Characterization of Mechanical and Hygroscopic Properties of Individual Canes of Reed

Investigating the Underlying Effect of Thermal Modification on Shrinkage Behavior of Bamboo Culm by Experimental and Numerical Methods

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