Article
Automation & Control Systems
Liping Liu, Bo Lian, Changgeng Zhou, Kehao Duan, Xueming Zhu, Pingfeng Xia
Summary: Choosing tools with appropriate geometric structure is crucial in preventing delamination during drilling CFRP, and the plane rake-faced twist drill demonstrates better performance in this regard, with good inhibition effects at the entrance and exit.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Tianxi Liu, Jun Zhou, Lei Liang, Zhengfeng Bai, Yang Zhao
Summary: The study investigated the influence of drill bit structure on lunar soil drilling process, optimized the drill bit structure to improve sample collection efficiency, and proposed a bubble-shaped sample collecting law.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Engineering, Marine
Mengke Wang, Wenbo He, Minqi Wang, Jine Cao, Pinlu Cao
Summary: Air reverse circulation drilling is a promising method for ice drilling due to its high mechanical penetration rate and lack of pollution. The structure of the drill bit and the presence of ice core have significant impacts on the effect of air reverse circulation.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Construction & Building Technology
Guangzhe Zhang, Kurosch Thuro, Heinz Konietzky, Florian M. Menschik, Heiko Kaesling, Michael Bayerl
Summary: The study indicates that different rock types have significant impact on drilling performance and tool wear. The highest performance is observed in drilling sandstone, while the lowest tool wear is found in amphibolite and basalt. Furthermore, penetration rate is closely related to rock mechanical properties.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Review
Engineering, Biomedical
Mohd Faizal Ali Akhbar, Akmal Wani Sulong
Summary: Research has shown that improving drill bit design is a feasible and cost-effective solution to reduce bone drilling damage. This review emphasizes the importance of systemizing information on drill design and provides insights into advances in drill bit design and their impacts on bone damage.
ANNALS OF BIOMEDICAL ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Weiji Liu, Kaichuang Deng, Rui Li, Lei Li, Xiaohua Zhu, Shuchun Gong
Summary: With the increasing exploitation of hot dry rock geothermal resources, the drilling efficiency is seriously restricted by the high hardness and wear resistance of formations such as granite. This paper conducted rock-breaking experiments and analyzed the performance of three types of drill bits. It also discussed the wear and failure degree of the drill bits in sandstone to granite formations. The results showed that PDC bit has the highest rate of penetration with the largest wear degree, while the tri-cone bit has the smallest wear but low drilling efficiency. The PDC-cone composite bit has intermediate performance. This paper provides valuable information for analyzing the adaptability of drill bits and selecting appropriate drill bit types for drilling in granite formations.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Automation & Control Systems
Zhen Cai, Xuzhi Lai, Min Wu, Chengda Lu, Luefeng Chen
Summary: This paper investigates the robust control of drilling trajectory with weight-on-bit uncertainty in directional drilling. A control scheme based on equivalent-input-disturbance is proposed to precisely control the drilling trajectory by suppressing the fluctuations of weight-on-bit.
Article
Geochemistry & Geophysics
Flavio Poletto, Alex Goertz, Cinzia Bellezza, Endre Vange Bergfjord, Piero Corubolo, John Even Lindgard, Lars Martin Moskvil
Summary: Seismic-while-drilling (SWD) has been successfully used in onshore applications, but due to logistical and cost reasons, it is more challenging to apply offshore. Researchers have developed a novel approach that uses predeployed passive-monitoring sea-bottom nodes to record offshore SWD data effectively. A pilot test in the Barents Sea demonstrated the effectiveness of this method and its potential for real-time monitoring and prediction of drilling progress.
Article
Engineering, Manufacturing
Liming Shu, Shihao Li, Zhenglong Fang, Toru Kizaki, Katsuyo Kimura, Giichi Arai, Koichi Arai, Naohiko Sugita
Summary: The study altered the drilling approach for CFRP from crushing/compression fracture to shear cutting to suppress thermomechanical loads, achieving a significant improvement in performance. The dedicated drill bit outperformed the conventional drill bit in terms of thrust force, temperature elevation, burr, and exit-delamination, highlighting the effectiveness of the new design approach.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Review
Materials Science, Multidisciplinary
Md Ashequl Islam, Nur Saifullah Kamarrudin, Ruslizam Daud, Siti Noor Fazliah Mohd Noor, Azwan Iskandar Azmi, Zuradzman Mohamad Razlan
Summary: This study aims to summarize the current state of scientific knowledge on factors that contribute to heat generation during the bone drilling process and how these aspects can be better understood and avoided in the future. It emphasizes the importance of optimizing drill bit design to reduce thermal damage and improve the success rate of bone drilling surgeries.
Article
Acoustics
Zhefei Sun, Daxi Geng, Fanxing Meng, Li Zhou, Ringgang Jiang, Deyuan Zhang
Summary: This paper investigates the drilling performance of T800 CFRP composites using three different drill bits. The results show that the dagger drill is the best choice, providing the lowest thrust force and damages during drilling. Ultrasonic vibration is successfully applied to the dagger drill, resulting in a further improvement in drilling performance. The experimental results demonstrate that ultrasonic vibration reduces thrust force and surface roughness, with significant decreases of 14.1% and 62.2% respectively. Moreover, hole diameter errors are significantly reduced from 30 μm to 6 μm. The mechanisms of force reduction and hole quality improvement by ultrasonic vibration are also explained. The combination of ultrasonic vibration and dagger drill is a promising strategy for high-performance drilling of CFRP.
Article
Energy & Fuels
Yan Tie, Xu Rui, Sun Wenfeng, Liu Weikai, Hou Zhaokai, Yuan Yuan, Shao Yang
Summary: The study developed a new drill bit selection method using grey relational analysis theory and absolute ideal solution construction, which is simple to calculate and suitable for dynamic drill bit databases. This method can improve drilling efficiency, extend drill bit lifespan, and demonstrate good economic benefits and compatibility in actual drilling operations.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2021)
Article
Engineering, Geological
Yinlin Ji, Lu Wang, Yanlong Zheng, Wei Wu
Summary: Thermo-mechanical drilling combines flame thermal treatment and rotary head drilling to achieve high penetration rates and low drill bit wear in granitic rocks. The Cerchar abrasivity test results indicate that overheating rocks may lead to increased abrasive minerals exposure and enhanced drill bit wear.
Article
Acoustics
Pengfei Deng, Xing Tan, He Li
Summary: In this paper, the authors improve the surface morphology method and study the bit-rock interaction model between the rock and the PDC bit, taking into account the impact of blade shape and cutter arrangement. They establish a dynamic model for a deep drilling system equipped with an arbitrary shape PDC bit and propose a stability prediction method. The results show that the shape of the blades and arrangement of the cutters on the PDC bit significantly affect the nonlinear vibration of the drilling system.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Engineering, Manufacturing
Meng Zhao, Fuji Wang, Rao Fu, Kai Sun, Changlin Du, Jiacheng Cui
Summary: A novel method for quantifying CFRP delamination and Al burr was proposed, and a new quality indicator for hole diameter was developed to ensure the accuracy of evaluating the drilling quality. The thermal-mechanical interaction on hole defects in drilling different thick stacks was elucidated for the first time. The results showed that the thicker stacks increased the drilling temperature and reduced the thrust force, while smaller diameter deviation was found in drilling thicker stacks.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Endocrinology & Metabolism
Mathieu Simon, Michael Indermaur, Denis Schenk, Seyedmahdi Hosseinitabatabaei, Bettina M. Willie, Philippe Zysset
Summary: Osteogenesis Imperfecta (OI) is a genetic bone disorder characterized by impaired collagen synthesis, altered trabecular bone structure, and reduced bone mass. This study used HR-pQCT to compare the bone morphology of OI patients with healthy controls. The results showed that OI samples had significantly lower BV/TV and trabecular number, higher trabecular separation and standard deviation, but no difference in trabecular thickness compared to healthy controls. The stiffness analysis revealed that the fabric-elasticity relationships between OI and healthy individuals were similar when the ROIs were sufficiently homogeneous.
Article
Endocrinology & Metabolism
Lilian Sewing, Laura Potasso, Sandra Baumann, Denis Schenk, Furkan Gazozcu, Kurt Lippuner, Marius Kraenzlin, Philippe Zysset, Christian Meier
Summary: Type 1 diabetes (T1DM) is associated with an increased risk of nonvertebral fractures, and the influence of glycemic control and microvascular disease on skeletal health in long-standing T1DM is not well understood. This study found that patients with long-standing T1DM had lower bone mineral density (BMD), decreased bone turnover, and weaker bones at the ultradistal tibia compared to non-diabetic controls. The presence of diabetic peripheral neuropathy was found to contribute to the altered cortical microarchitecture and reduced bone strength in T1DM patients.
JOURNAL OF BONE AND MINERAL RESEARCH
(2022)
Article
Biophysics
Denis Schenk, Philippe Zysset
Summary: The present study aims to identify an optimal, personalized, multiaxial load case at the distal section of the human radius using in vivo HR-pQCT-based isotropic, homogenized finite element (hFE) analysis. The results show that the optimized linear six-degree-of-freedom load case achieves a more homogeneous tissue loading and can absorb more energy.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2023)
Article
Engineering, Biomedical
Marta Pena Fernandez, Jakob Schwiedrzik, Alexander Burki, Francoise Peyrin, Johann Michler, Philippe K. Zysset, Uwe Wolfram
Summary: The development of treatment strategies for skeletal diseases relies on the understanding of bone mechanical properties in relation to its structure at different length scales. In this study, the anisotropic crack propagation, deformation, and fracture of ovine cortical bone under different indenters were investigated using in situ high-resolution SR μCT indentation testing and digital volume correlation. The results revealed the significant dependence of the crack development on the anisotropy ahead of the tip, with lower strains and smaller crack systems developing in samples indented in the transverse material direction. The study sheds light on the importance of three-dimensional investigation of bone deformation and fracture behavior to explore the mechanisms of bone failure.
ACTA BIOMATERIALIA
(2023)
Article
Engineering, Biomedical
Elham Alizadeh, Sadik Omairey, Philippe Zysset
Summary: In this study, we developed a 3D non-linear finite element unit-cell model to investigate the behavior of mineralized collagen fibril arrays after yielding. The model was compared with experimental tests and showed good quantitative agreement. The simulation results revealed the dominant role of mineralized collagen fibrils in load bearing prior to yielding and the initiation of damage through debonding and sliding at the interface between the fibrils and the matrix. The model's integration into larger length scales could provide a detailed understanding of the post-yield behavior and failure mechanisms of trabecular and cortical bone.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Geriatrics & Gerontology
Christina Wapp, Emmanuel Biver, Serge Ferrari, Philippe Zysset, Marcel Zwahlen
Summary: The aim of this study was to develop a statistical model to predict future fall rates in older adults using personalized risk predictors. The results showed that the number of prior falls was a strong risk factor, with individuals who have experienced three or more falls being more likely to fall multiple times again.
Article
Biotechnology & Applied Microbiology
Alice Dudle, Yvan Gugler, Michael Pretterklieber, Serge Ferrari, Kurt Lippuner, Philippe Zysset
Summary: Osteoporosis is currently diagnosed based on 2D DXA scans, but this method does not consider the 3D bone geometry and density distribution. QCT scans combined with FE analysis can provide improved femoral strength predictions, but high radiation dose and cost limit its usage. The 3D-Shaper software reconstructs the 3D shape and density distribution of the femur from 2D DXA scans, which could provide a more accurate estimation of femoral strength.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Michael Woeltje, Liesa Kuenzelmann, Basak Belguecan, Andreas S. Croft, Benjamin Voumard, Stefan Bracher, Philippe Zysset, Benjamin Gantenbein, Chokri Cherif, Dilbar Aibibu
Summary: Low back pain is commonly caused by degeneration of the intervertebral discs. Current treatments are unable to effectively restore the function of the discs. This study aimed to reconstruct the annulus fibrosus and nucleus pulposus of the intervertebral disc using silk as a biomaterial. The researchers developed an embroidered structure to mimic the fiber orientation and lamellar structure of the annulus fibrosus, and used fiber additive manufacturing to replicate the fiber network of the nucleus pulposus and create a porous 3D structure.
Article
Engineering, Biomedical
Alexander Groetsch, Aurelien Gourrier, Daniele Casari, Jakob Schwiedrzik, Jonathan D. Shephard, Johann Michler, Philippe K. Zysset, Uwe Wolfram
Summary: The hierarchical design of bio-based nanostructured materials allows them to combine unique structure-mechanical properties. Water, as a main component in bone, plays a crucial role in its mechanical behavior. In this study, a direct connection between experiment and model is established to investigate the effect of rehydration on the mechanical properties of mineralized collagen fibers. The results show that rehydration reduces the yield stress, compressive strength, and stiffness of the fibers, with a greater effect on stresses than strains. The findings provide insights into the water-mediated structuring of bone apatite and its implications for mechanical behavior.
ACTA BIOMATERIALIA
(2023)
Article
Endocrinology & Metabolism
Matthias Walle, Danielle E. Whittier, Denis Schenk, Penny R. Atkins, Michael Blauth, Philippe Zysset, Kurt Lippuner, Ralph Mueller, Caitlyn J. Collins
Summary: This study developed bone mechanoregulation markers and their precision using participants from two cohorts. The results showed that bone formation occurred in high-strain regions and bone resorption occurred in low-strain regions for all participants, indicating a consistent response to mechanical stimuli. This work provides novel and robust bone mechanoregulation markers for designing future clinical studies.
Article
Endocrinology & Metabolism
Danielle E. Whittier, Matthias Walle, Denis Schenk, Penny R. Atkins, Caitlyn J. Collins, Philippe Zysset, Kurt Lippuner, Ralph Mueller
Summary: The study established a multi-stack registration protocol for evaluating longitudinal HR-pQCT images and assessing the accuracy and precision error. Results showed that most scans improved or maintained stack alignment when multi-stack registration was implemented, with significant decrease in false discovery rate of bone remodelling events after multi-stack registration. The precision error was significantly reduced or remained unchanged in most bone morphology and micro-finite element analysis parameters.
Article
Endocrinology & Metabolism
Michael Indermaur, Daniele Casari, Tatiana Kochetkova, Bettina M. Willie, Johann Michler, Jakob Schwiedrzik, Philippe Zysset
Summary: Osteogenesis imperfecta (OI) is a genetic bone disease that leads to an increased risk of fractures. This study investigated the tensile properties of healthy and OI bone extracellular matrix (ECM). The results showed that OI bone ECM exhibited similar tensile properties to healthy bone, and the mechanical properties were primarily influenced by the orientation of mineralized collagen fibers (MCF) and the degree of bone mineralization (DBM).
Correction
Geriatrics & Gerontology
Christina Wapp, Anne-Gabrielle Mittaz Hager, Roger Hilfiker, Philippe Zysset
FRONTIERS IN AGING
(2023)
Proceedings Paper
Computer Science, Interdisciplinary Applications
Marzieh Ovesy, Philippe K. Zysset
Summary: This study simulated the implantation process and evaluated the influence of press-fit on the primary stability of total hip arthroplasty. The results showed that a higher press-fit increased the implantation force, while a lower press-fit provided better stability during the loading cycle.
COMPUTER METHODS, IMAGING AND VISUALIZATION IN BIOMECHANICS AND BIOMEDICAL ENGINEERING II
(2023)
Meeting Abstract
Endocrinology & Metabolism
Michael Indermaur, Daniele Casari, Tatiana Kochetkova, Bettina Willie, Johann Michler, Jakob Schwiedrzik, Philippe Zysset
JOURNAL OF BONE AND MINERAL RESEARCH
(2022)