scholarly journals Study on Mathematical Model of Compression Performance of Bamboo Culm Integrated Bamboo Bundles Glulam Beam

2018 ◽  
Author(s):  
Zhangrong Zhao ◽  
Xiaomei Sui ◽  
Xingyu Liu ◽  
Weihua Sun ◽  
Xiangling Gong
Keyword(s):  
Mathematical Model ◽  
Bamboo Culm ◽  
Glulam Beam ◽  
Compression Performance

Study on Bamboo Culm Used for Structure Axial Compression Performance Numerical Simulation

2013 ◽  
Vol 842 ◽  
pp. 13-17
Author(s):  
Zhang Rong Zhao ◽  
Wan Si Fu ◽  
Wang Han ◽  
Jin Bo Zhou
Keyword(s):  
Axial Compression ◽  
Green Building ◽  
Test Methods ◽  
Digital Design ◽  
Testing Methods ◽  
Bamboo Culm ◽  
Compression Performance ◽  
Design And Manufacturing ◽  
New Type ◽  
The Ideal

Bamboo culms as a structural building material have many advantages, are the ideal material for the future green building, and are increasingly brought to the attention of the industry. If it is widely recognized and adopted by structure and architecture, the complete bamboo culms performance parameters, testing methods, application of standards, and digital design and manufacturing methods are needed. Bamboo culms as a new type of building support, axial compression performance is directly related to the safety of the bamboo-framed buildings. This paper aims to study the structural properties of the bamboo culms compression test methods, and compression failure was simulated. Simulation results and experimental results are consistent. The model proposed in the work provides technical support for the structure of bamboo.

scholarly journals A Kind of Filling Lattice Structure Based on DFAM for Mechanical Parts: The Diamond Lattice Structure

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Xuan Yin ◽  
Wenjun Meng ◽  
Jinzhao Cheng ◽  
Hailong Wang ◽  
Xiaoxia Zhao
Keyword(s):  
Mathematical Model ◽  
Additive Manufacturing ◽  
Lattice Structure ◽  
Variable Density ◽  
Diamond Lattice ◽  
Compression Tests ◽  
Compression Performance ◽  
Mechanical Parts ◽  
Equivalent Modulus ◽  
The Mathematical Model

Thanks to the geometric and material complexity of additive manufacturing, the design space of mechanical parts has been developed, in which lattice filling structure customization can be applied to the solid filling of mechanical parts to achieve the goal of mechanical structure lightweight. A kind of diamond lattice structure unit is designed by imitating the natural method based on Design for Additive Manufacturing of mechanical parts. The mathematical model of the relative density and mechanical properties of the unit are established, and the relationship between the two is obtained, which is verified by simulations; then the relatively uniform results are obtained. The variable density hypothesis of diamond lattice structure is proposed, the methods of simulations and compression tests are used to verify the hypothesis, and the results show that the variable density structure with the density of the filling element decreasing gradually with the stress point as the center has better compression performance and concurrently verify the correctness and applicability of the equivalent modulus of elasticity mathematical model. The results of this study can be applied to the solid sandwich filling of pressure mechanical parts, and the stress density matching relationship can be carried out to further specific design.

Mathematical model of hit phenomena and its application to movie advertisement

2008 ◽  
Author(s):  
Ishii Akira ◽  
Yoshida Narihiko ◽  
Hayashi Takafumi ◽  
Umemura Sanae ◽  
Nakagawa Takeshi
Keyword(s):  
Mathematical Model

Imprecision of Laboratory Determinations and Diagnostic Accuracy: Theoretical Considerations

1974 ◽  
Vol 13 (03) ◽  
pp. 151-158 ◽  
Author(s):  
D. A. B. Lindbebo ◽  
Fr. R. Watson
Keyword(s):  
Mathematical Model ◽  
Diagnostic Accuracy ◽  
Diagnostic Process ◽  
Clinical Laboratories ◽  
Non Linear ◽  
Theoretical Considerations ◽  
Made In

Recent studies suggest the determinations of clinical laboratories must be made more precise than at present. This paper presents a means of examining benefits of improvement in precision. To do this we use a mathematical model of the effect upon the diagnostic process of imprecision in measurements and the influence upon these two of Importance of Diagnosis and Prevalence of Disease. The interaction of these effects is grossly non-linear. There is therefore no proper intuitive answer to questions involving these matters. The effects can always, however, be calculated.Including a great many assumptions the modeling suggests that improvements in precision of any determination ought probably to be made in hospital rather than screening laboratories, unless Importance of Diagnosis is extremely high.

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