Article
Forestry
Chandan Kumar, Adam Faircloth, Jon Shanks, Robert L. McGavin, Xin Li, Mahmud Ashraf, Mahbube Subhani
Summary: This paper investigates the influence of various factors on rolling shear properties of timber feedstock for cross laminated timber (CLT) available from Australian plantation forest resources. Comparison of rolling shear properties between three softwood species shows that hoop pine samples have the highest values, while radiata pine samples have the lowest values. The study also reveals that density and modulus of elasticity have a weak correlation with rolling shear properties, and that equilibrium moisture content, aspect ratio, knots, and projection length also affect rolling shear behavior.
Article
Materials Science, Multidisciplinary
S. Shrikanth, Suresh Neelakantan, Rajesh Prasad
Summary: The elastic properties of crystalline solids are anisotropic. The shear modulus G(n,m) depends on both the shear plane normal n and the shear direction m. This study investigates the anisotropy of the shear modulus within shear planes and presents novel 3D surfaces to represent this anisotropy. It is found that shear planes with G(n,m) independent of m can exist in all crystal systems.
MECHANICS OF MATERIALS
(2023)
Article
Chemistry, Physical
Marek Wieruszewski, Adrian Trocinski, Jakub Kawalerczyk, Adam Derkowski, Radoslaw Mirski
Summary: Pine timber of Polish origin for structural purposes exhibits significant variability in quality parameters. Technological suitability is determined by evaluating mechanical, physical, and visual properties. Research shows a correlation between the occurrence of specific defects and the modulus of elasticity.
Article
Forestry
Chun-Wei Chang, Fu-Lan Hsu, Feng-Cheng Chang, Yan-San Huang
Summary: Wood is widely used in engineering, but accurately measuring parameters such as longitudinal bending elasticity and shear modulus remains challenging. This study proposes a method using strain gauges and dial gauges to directly and accurately measure these parameters, providing a reliable way to assess the elastic and shear properties of wood.
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
(2022)
Article
Construction & Building Technology
Richard Nero, Philip Christopher, Tuan Ngo
Summary: The study found a strong positive relationship between aspect ratio and strength, as well as a significant impact of annual ring orientation distribution on shear modulus. Additionally, the load direction was shown to have a substantial effect on the measured rolling shear strength.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Forestry
Marina Totsuka, Robert Jockwer, Kenji Aoki, Masahiro Inayama
Summary: The experimental testing of compression strength and stiffness parallel to the grain of solid timber revealed that the presence of knots in glulam specimens resulted in a size effect, while solid wood specimens without knots did not exhibit this phenomenon. The height and width of the cross-section of the specimens were found to influence the damage zones and effective modulus of elasticity. Additionally, compression strength was correlated with timber density and annual ring width.
JOURNAL OF WOOD SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Giovanna Concu
Summary: This research aims to quantify the variation of dynamic modulus of elasticity (MoEdyn) in Sardinian maritime pine boards from wet to dry condition, which can potentially reduce manufacturing costs, environmental impact, and increase structural grade yield by estimating dry MoEdyn through sonic testing in wet condition.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Geological
Lang Liu, Silvio B. Giger, Derek Martin, Rick Chalaturnyk, Kristof Schuster, Nathan Deisman, Lukas Keller
Summary: Opalinus Clay is the designated host rock for a deep geological repository of radioactive waste in Switzerland. The determination of its geo-mechanical properties relies heavily on laboratory tests on small specimens. The pressuremeter tests were performed in Opalinus Clay to assess its in-situ elastic stiffness at a larger scale. The shear modulus of the Opalinus Clay is dependent on the expansion pressure and exhibits a nonlinear dependence on strain increment.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Construction & Building Technology
Ryan W. Sun, George C. Fanourakis
Summary: This research study assesses the performance of multiple concrete elastic modulus estimation models and finds that the ACI 363 model is the most accurate, while the CEB-FIP model is the least accurate. It is recommended to utilize the ACI 363 model in creep prediction models and it is noted that not all modified estimation models produce better estimates.
STRUCTURAL CONCRETE
(2022)
Article
Engineering, Geological
Zulkuf Kaya, Ayfer Erken, Huseyin Cilsalar
Summary: Determining shear modulus and damping ratio in the field is crucial when shear strains exceed those from laboratory tests, particularly for structures with significant interaction with soil. Experimentally, as plasticity increases, the elasticity modulus ratio of soils also increases, indicating higher seismic performance demands for structures with soil profiles.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Computer Science, Artificial Intelligence
Guoping Zhao, Omid Mohseni, Marc Murcia, Andre Seyfarth, Maziar A. Sharbafi
Summary: The interaction between motor control and morphological design of the human leg is crucial for efficient and robust locomotion. Serial PAM has a more pronounced impact on efficiency, performance, stability, and robustness of hopping, with increasing stiffness decreasing leg stiffness during the unloading phase.
FRONTIERS IN NEUROROBOTICS
(2022)
Article
Construction & Building Technology
Pavel Dobes, Antonin Lokaj, Kristyna Vavrusova
Summary: This paper examines the deformation properties of cross-laminated timber (CLT) panels through laboratory tests, analytical calculation, and numerical modeling. The results demonstrate a good agreement in bending behavior between the experimental tests, the analytical calculation, and two different numerical analysis approaches.
Article
Physiology
Feng Li, Zhen-Ya Wang, Zhi-Jie Zhang, Su-Hong Shen, Jia-Yi Guo, Yan-Xing Guo, Yi-Ran Feng, Lin Zhang, Yong-Bing Wen, Yun-Fei Zhang, Yi-Ming Fan, Meng-Meng Fan
Summary: Shear wave elastography measurement of shear modulus may be helpful in the diagnosis and treatment of patients with knee osteoarthritis.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Multidisciplinary Sciences
G. Saccomandi, L. Vergori, E. M. Zanetti
Summary: Elastographic investigations can detect benign and malignant lesions in tissues or organs by identifying pathological regions through alterations in stiffness. This paper demonstrates that the estimation of shear modulus can be significantly improved using the fourth-order weakly nonlinear theory of elasticity, providing more precise assessment of stiffness. The article also discusses why this theory is more reliable than the fully nonlinear theory of elasticity.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Chemistry, Physical
Cinthya Bertoldo, Geise Aparecida Pereira, Raquel Goncalves
Summary: When characterizing wood using ultrasound, it is possible to reduce the size of the polyhedron specimen without affecting the results of the elastic parameters obtained. This simplifies the manufacturing process and allows for better-directed symmetry axes.
Article
Forestry
R. Brandner, G. Flatscher, A. Ringhofer, G. Schickhofer, A. Thiel
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
(2016)
Article
Forestry
R. Brandner, A. Ringhofer, M. Grabner
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
(2018)
Article
Engineering, Civil
A. Polastri, I. Giongo, A. Angeli, R. Brandner
ENGINEERING STRUCTURES
(2018)
Review
Engineering, Civil
Andreas Ringhofer, Reinhard Brandner, Hans Joachim Blass
ENGINEERING STRUCTURES
(2018)
Article
Engineering, Civil
R. Brandner
ENGINEERING STRUCTURES
(2018)
Article
Engineering, Civil
Gerhard Fink, Jochen Kohler, Reinhard Brandner
ENGINEERING STRUCTURES
(2018)
Article
Engineering, Civil
T. Ehrhart, R. Brandner
ENGINEERING STRUCTURES
(2018)
Article
Statistics & Probability
Reinhard Brandner, Ernst Stadlober
COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION
(2016)
Article
Engineering, Civil
Ursula Mahlknecht, Reinhard Brandner
ENGINEERING STRUCTURES
(2019)
Article
Engineering, Civil
Reinhard Brandner, Andreas Ringhofer, Tobias Reichinger
ENGINEERING STRUCTURES
(2019)
Article
Chemistry, Physical
Georg Baumann, Reinhard Brandner, Ulrich Mueller, Alexander Stadlmann, Florian Feist
Summary: The study investigated the impact behavior of solid birch wood and solid beech wood at different temperature levels. It found that deceleration forces were highest at temperatures at and below zero in both wood types. While the impact bending energy of solid birch wood remained relatively constant over the temperature range, solid beech wood exhibited greater variability and scattering.
Article
Construction & Building Technology
Raimund Sieder, Reinhard Brandner
Summary: This paper describes the bending properties and system effects of resawn glulam and flex_GLT-beams using a 3D stochastic-numerical beam model. The model uses probabilistic models to create input values for unsplit and split boards as well as finger joints, and has been successfully validated and applied in various parameter studies.
Article
Construction & Building Technology
Reinhard Brandner, Lukas Jantscher
Summary: A systematic investigation into the out-of-plane tension in cross laminated timber (CLT) as a planar timber construction product is still lacking. This study aimed to determine the tensile properties of CLT made of Norway spruce and identify the essential influencing parameters, comparing them with glulam. The orthogonal laminated structure of CLT led to significantly higher tensile properties out-of-plane compared to glulam, with a lognormal distribution proving to be a more representative model for characterizing the tensile strength.
Article
Materials Science, Paper & Wood
Reinhard Brandner
WOOD MATERIAL SCIENCE & ENGINEERING
(2019)
Article
Construction & Building Technology
Reinhard Brandner, Philipp Dietsch, Julia Droescher, Michael Schulte-Wrede, Heinrich Kreuzinger, Mike Sieder
CONSTRUCTION AND BUILDING MATERIALS
(2017)