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Relevant bibliographies by topics / Unloading path

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Academic literature on the topic 'Unloading path'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Unloading path"

1

Zhang, Zhezhe, Baohua Guo, Shengjin Cheng, Pengbo Zhong, and Chuangwei Zhu. "Experimental study on shear mechanical properties of concrete joints under different unloading stress paths." PLOS ONE 19, no. 9 (2024): e0310694. http://dx.doi.org/10.1371/journal.pone.0310694.

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In order to study the shear mechanical properties of rock joint under different unloading stress paths, the RDS-200 rock joint shear test system was used to carry out direct shear tests on concrete joint specimens with five different morphologies under the CNL path and different unloading stress paths. The unloading stress paths include unloading normal load and maintaining constant shear load (UNLCSL), unloading normal load and unloading shear load (UNLUSL), unloading normal load and increasing shear load (UNLISL). The results show that the peak shear strength, cohesion, internal friction ang

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2

Fozao, D. S., A. E. Foudjet, A. Kouam, and D. Fokwa. "Modeling the stress-strain behavior of Bamboo under cyclic uniaxial loading." Revue Scientifique et Technique Forêt et Environnement du Bassin du Congo 2 (November 16, 2015): 9–27. https://doi.org/10.5281/zenodo.33836.

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This paper presents a series of cyclic uniaxial compressive loading tests carried out on cylindrical samples of bamboo, in order to develop unloading and reloading stress-strain models. Two bamboo species from Congo Basin, the Bambusa vulgaris and Oxytenantera abyssinica were used for these experiments.   It is found from the test results that the unloading and reloading do not essentially change the shape of the envelope curves of the stress-strain relations and that to predict models for an unloading and a reloading path, the plastic strain, the unloading strain, the strain at yield, th

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Dai, Bing, Guoyan Zhao, Longjun Dong, and Chen Yang. "Mechanical Characteristics for Rocks under Different Paths and Unloading Rates under Confining Pressures." Shock and Vibration 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/578748.

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To investigate mechanical characteristics of rocks under different unloading conditions, triaxial tests are carried out with initial confining pressures of 10, 20, and 30 MPa and unloading rates of 0.05~1 MPa/s in three stress paths. Results show that the increment of axial strain is far less than that of the lateral strain. The unloading rates of confining pressures have less influence on variation of strain and lateral increment in path I. The variation of axial increment strain in the same time is slightly larger than the variation of lateral increment; D-value is influenced by unloading ra

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Qin, Tao, Hongru Sun, Heng Liu, et al. "Experimental Study on Mechanical and Acoustic Emission Characteristics of Rock Samples under Different Stress Paths." Shock and Vibration 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/4813724.

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A series of tests on characteristics of acoustic emission have been performed on sandstone under uniaxial, conventional, and triaxial conditions and the unloading confining pressure path. The failure mode of rock specimen has been scanned by CT and a three-dimensional reconstruction was made. The differences on characteristics of AE, mechanics, and the failure mode of sandstone during the failure process under three paths are studied. The results show that the deformation of rock specimen is bigger, and axial strain and circumferential strain have a deformation platform at peak point of stress

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Pan, Jiahui, Lizhang Xu, En Lu, et al. "Design and Experiment of an Unoccupied Control System for a Tracked Grain Vehicle." Sensors 24, no. 9 (2024): 2715. http://dx.doi.org/10.3390/s24092715.

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In order to enhance crop harvesting efficiency, an automatic-driving tracked grain vehicle system was designed. Based on the harvester chassis, we designed the mechanical structure of a tracked grain vehicle with a loading capacity of 4.5 m3 and a grain unloading hydraulic system. Using the BODAS hydraulic controller, we implemented the design of an electronic control system that combines the manual and automatic operation of the chassis walking mechanism and grain unloading mechanism. We utilized a hybrid A* algorithm to plan the traveling path of the tracked grain vehicle, and the path-track

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Zhang, Yan Gang, Kun Yong Zhang, Wang Lin Li, and Qiao Zhen Shi. "Unloading Triaxial Experimental Study on Stress Path of Excavated Soil Slope." Advanced Materials Research 243-249 (May 2011): 2797–801. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2797.

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The current research was implemented to study the practical unloading stress path that the slope mass experienced during the excavation process, which is very important in the stress and strain numerical analysis. Series of unloading tests were carried out under different confining pressure. During the test process, the minor principal stress was kept decreasing, while the major principal stress was kept unchanged to simulate the stress path in some locations of the soil slope, such as at the top of the slope. The corresponding conventional triaxial compression tests were also carried out as c

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Zhang, Yingjie, Jiangteng Li, Gang Ma, and Shuangfei Liu. "Unloading Mechanics and Energy Characteristics of Sandstone under Different Intermediate Principal Stress Conditions." Advances in Civil Engineering 2021 (April 22, 2021): 1–9. http://dx.doi.org/10.1155/2021/5577321.

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The TRW-3000 true triaxial rock testing machine was used to conduct loading and unloading tests of sandstone under different σ 2 , and the true triaxial lateral unloading mechanics and energy characteristics of sandstone under different σ 2 were studied. The experimental results show the following: (1) compared with the results of the loading test, the peak strength of the sandstone under the unloading σ 3 path is reduced, the unloading direction has obvious expansion and deformation, and the amount of expansion increases significantly with the increase of σ 2 ; sudden brittle failure occurs a

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Prakash, Sabyasachi, Michael Myers, George Wong, Lori Hathon, and Duane Mikulencak. "Experimental Studies to Evaluate the Effects of Different Unloading Stress Paths on Strength Properties of Unconsolidated Sands." Geosciences 15, no. 5 (2025): 173. https://doi.org/10.3390/geosciences15050173.

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The mechanical behavior of rocks under loading conditions depends on stress path and magnitude. With increasing load, rocks have an elasto-plastic behavior. Within the loading yield surface, constitutive models assume that rocks behave elastically and are independent of the stress path and magnitude (e.g., Mohr–Coulomb models). We performed tests on unconsolidated sands (no cementation), and under both loading and unloading conditions. We mapped the loading yield surface using a multi-stage triaxial test with the yield criterion as the point of positive dilatancy. We studied the yield behavior

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Zhou, Xiaogui, Haiming Liu, Yintong Guo, Lei Wang, Zhenkun Hou, and Peng Deng. "An Evaluation Method of Brittleness Characteristics of Shale Based on the Unloading Experiment." Energies 12, no. 9 (2019): 1779. http://dx.doi.org/10.3390/en12091779.

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Shale reservoir has an initial unloading effect during the natural uplift and erosion process, which causes the shale brittleness to change, affecting the design of the fracturing scheme. To consider this, the axial compression loading and confining pressure unloading experiment of shale is carried out, and then the influence of unloading rate on the mechanical parameters, failure characteristics, and the brittleness of rock are analyzed. What is more, a new evaluation method of brittleness characteristics that take the unloading effect into consideration is proposed. The conclusions are as fo

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Li, Lu, Meng Zang, Rongtang Zhang, and Haijun Lu. "Experimental Study on Mechanical Properties of Structured Clay under Different Unloading Rates and Unloading Stress Paths." Buildings 13, no. 6 (2023): 1544. http://dx.doi.org/10.3390/buildings13061544.

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Consolidated undrained triaxial shear tests were performed on undisturbed saturated structured clay at three unloading rates (0.1, 0.25, and 2.5 kPa/min) using a GDS triaxial system to determine the effects of different unloading rates and unloading stress paths on the stress–strain relationship, pore pressure variation, and failure strength characteristics of Zhanjiang structured clay. Microstructural changes in the clay were observed during shear tests at different unloading rates. Furthermore, the obtained stress–strain relationship indicates strain-softening under different unloading stres

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Book chapters on the topic "Unloading path"

1

Li, Xiaozhao, Zhushan Shao, and Chengzhi Qi. "Loading and Unloading Path Effect on Creep Fracture." In Static Creep Micro-Macro Fracture Mechanics of Brittle Solids. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-8203-5_3.

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Asari, Shunsuke, and Toshihiko Kuwabara. "Measurement and Analysis of Elasto-Plastic Deformation Characteristics of Aluminum Alloy Sheet Subjected to Non-linear Stress Paths Without Intermediate Elastic Unloading." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-40920-2_39.

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Duan, Shuqian, Zhongsui Cao, Jiecheng Xiong, Bei Cao, and Chenyang Li. "Investigation on Applicability of Common Failure Criteria of Interlayer Staggered Zone Under Unloading Conditions of High Geostress." In Advances in Transdisciplinary Engineering. IOS Press, 2023. http://dx.doi.org/10.3233/atde230745.

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Based on the experimental results obtained from the undrained triaxial unloading tests of interlayer staggered zone (ISZ), the validity and applicability of five conventional strength criteria are investigated to describe the unloading failure and strength parameters of ISZ through the assessment indexes of the sum of absolute deviation. It is indicated that Mogi-Coulomb criterion has relatively low sum of absolute deviation and Euclidean norm, thus it has a preferable applicability to the description of the strength property of ISZ unloading failure, not only for the stress path of the axial

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Zwanenburg Cor and Barends Frans B.J. "Unravelling the anisotropy of peat." In Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2005. https://doi.org/10.3233/978-1-61499-656-9-469.

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The paper presents a study on the origin of anisotropy in stiffness of peat encountered in triaxial cell tests. It is shown that anisotropy affects the effective stress path in an undrained triaxial cell test. Due to the fibrous nature of peat a difference in stiffness is to be expected in the direction parallel and perpendicular to the fibres. A vertical load on a sample leads to an increase in pore pressure causing a decrease in radial effective stress and therefore to a radial unloading. Tests on non pre-loaded samples show that the difference in loading and unloading stiffness also plays a

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Wu, Lei, Ming Wei, and Xiang Chen. "Optimization Model of Unmanned Aerial Vehicle Distribution Path with Integrated Loading and Unloading." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2021. http://dx.doi.org/10.3233/faia210205.

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Unmanned aerial vehicle (UAV) delivery has the advantages of small size, high speed, and low cost. A new drone delivery path optimization model with loading and unloading integration is proposed in this study to make full use of UAV(drone) delivery by improving its efficiency. The model considers drone range constraints and loading capacity limitations, analyzes the start and end points of multiple orders, assigns orders to drones from the optimal distribution centers, calculating the order and time to visit all sets and delivery points, and pursuing the least transportation mileage. The ant c

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"Multi-field coupling effect of deep excavation under the stress path of unloading." In Transit Development in Rock Mechanics. CRC Press, 2014. http://dx.doi.org/10.1201/b17617-79.

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Zheng, Wulue, Wenjun Yuan, Fuchun Zhang, Ming Fan, and Xin Zhang. "Experimental Study on Mechanical Properties of Foundation Soil Under Unloading Condition." In Advances in Transdisciplinary Engineering. IOS Press, 2024. https://doi.org/10.3233/atde240979.

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The stability of transmission line tower foundation soil is crucial for the proper functioning of high-voltage transmission lines. To better understand the mechanisms behind soil deformation and instability, soil samples were collected from a transmission line tower foundation in Guangzhou. Tests were conducted under different stress paths to examine the effects of loading and unloading on the mechanical properties of the soil. A constitutive model was developed to account for unloading effects. The results showed that the stress-strain relationship of the foundation soil exhibited normalized

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Anand, Lallit, Ken Kamrin, and Sanjay Govindjee. "Three-dimensional small deformation theory of rate-independent plasticity." In Introduction to Mechanics of Solid Materials. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192866073.003.0013.

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Abstract This chapter discusses the small deformation three-dimensional Mises–Hill theory of rate-independent plasticity with isotropic hardening. The additive decomposition of the strain tensor into elastic and plastic parts is introduced, together with the assumption of plastic incompressibility. The Mises yield condition and the concept of isotropic strain-hardening are introduced, as is a plastic flow rule—together with attendant loading/unloading conditions—to formulate a complete macroscopic theory for three-dimensional rate-independent elastic-plastic deformation of metallic solids. The

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"Experimental of unloading mechanical properties of rock under different stress paths." In Transit Development in Rock Mechanics. CRC Press, 2014. http://dx.doi.org/10.1201/b17617-26.

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Dubchak, Viktor, and Elvira Manzhos. "THEORETICAL AND PRACTICAL STUDIES OF EFFECTIVE PHYSICAL AND MATHEMATICAL MODELS OF DESIGNING EDUCATIONAL RESOURCES IN AGRARIAN INSTITUTIONS OF HIGHER EDUCATION." In Modern educational technologies in the training of specialists in the agricultural sector during the crisis. Publishing House “Baltija Publishing”, 2023. http://dx.doi.org/10.30525/978-9934-26-298-2-5.

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The purpose of this paper to investigate the issue of optimal, extreme (minimum) coverage of the area of one flat figure, namely, a square (rectangle) of the area of another flat geometric figure, such as a circle (ellipse). The value of a certain function that determines the difference in the areas of the mismatch of the given geometric figures at the intersection has been obtained, in the first case the function is dependent on one variable argument, in the second case – on two arguments, in both cases the study of the extreme of this function has been carried out, it is shown that in the fo

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Conference papers on the topic "Unloading path"

1

Miao, Yiyang, Dawei Ding, Xingyu Hua, Xingbao Li, and Fengyu Xu. "A Digital Twin-Based Path Planning Method for Bending Robot Feeding and Unloading." In 2024 China Automation Congress (CAC). IEEE, 2024. https://doi.org/10.1109/cac63892.2024.10864840.

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2

Zhou, Guiliang, and Fei Tang. "Loading-Unloading Path Optimization of the AS/RS." In 2010 International Conference on Logistics Engineering and Intelligent Transportation Systems (LEITS). IEEE, 2010. http://dx.doi.org/10.1109/leits.2010.5665003.

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Liu, Xiayun, Tao Luo, Jingjing Wang, and Yangjie Ma. "Path Planning of Loading and Unloading Robots Based on Optimal Energy Consumption." In 2023 2nd International Conference on Futuristic Technologies (INCOFT). IEEE, 2023. http://dx.doi.org/10.1109/incoft60753.2023.10425060.

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Zhang, Jim. "Research on Automatic Loading and Unloading Path Design and Fixture Design for Industrial Robots." In 2024 International Conference on Artificial Intelligence and Digital Technology (ICAIDT). IEEE, 2024. http://dx.doi.org/10.1109/icaidt62617.2024.00072.

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Lin, Enqiang, and Yongming Liu. "Atomistic Simulations of Fatigue Crack Growth in Single Crystal Aluminum." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66084.

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The behaviors of model-I fatigue crack propagation behaviors under different strain cycles in single crystal aluminum have been systematically investigated by molecular dynamic and quasicontinuum method with embedded atom potential. Four different crack orientations: (010)[001], (111)[11-2], (110)[001] and (101)[10-1] are investigated by using the edge-crack model. Different fatigue crack growth mechanisms such as cleavage crack propagation, twinning and dislocation emission are observed. Premature crack surface contact during the unloading path is also observed for the (010)[001] crack, which

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Iijima, Takashi, Hisatake Itoga, Bai An, Chris San Marchi, and Brian P. Somerday. "Measurement of Fracture Properties for Ferritic Steel in High-Pressure Hydrogen Gas." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28815.

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Recently, the measurement of threshold stress intensity factors for various low alloy ferritic steels in high-pressure hydrogen gas of 103 MPa was performed, and it was revealed that the subcritical cracking threshold under rising displacement was lower than the subcritical cracking threshold for crack arrest under constant displacement. These experimental results demonstrate the importance of the testing method for evaluating the fracture properties in high-pressure hydrogen gas. We measured the subcritical cracking threshold under rising displacement for ASME SA-372 Grade J ferritic steels i

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Lee, Sang H. "Self-Adaptive Algorithm for Efficient Computation of Elasto-Plastic Material Process." In ASME 1991 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/cie1991-0107.

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Abstract Due to the path-dependent nature of the plastic material, plastic strains are calculated by an incremental procedure and the total strains are obtained by summation in the numerical computation. MSC/NASTRAN employs an adaptive subincremental process at the Gauss point level for accuracy and efficiency. Various options for yield criteria and hardening rules are implemented. The generalized effective plastic strain increment is derived to accommodate various yield criteria. By virtue of some salient considerations in implementing the numerical procedure, difficulties associated with unl

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Hama, T. "Crystal-plasticity finite-element simulations of two-step loading of a ferrite-martensite dual phase steel sheet." In Material Forming. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-102.

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Abstract. Ferrite-martensite dual-phase (DP) steel sheets are widely used for structural components of automobiles. The macroscopic mechanical properties, including the yield stress and work hardening, of DP steel sheets are strongly affected by the microstructural properties, including the mechanical properties, volume fraction, and grain geometries of each phase. When DP steel sheets are subjected to tension in the rolling direction followed by tension in the transverse direction, the stress level after the strain-path change becomes smaller than that under monotonic tension in the transvers

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Cao, Meng Long, and Zhang Peng. "Research on Loading and Unloading Path Optimization for AGV at Automatic Container Terminal Based on Improved Particle Swarm Algorithm." In 2020 4th Annual International Conference on Data Science and Business Analytics (ICDSBA). IEEE, 2020. http://dx.doi.org/10.1109/icdsba51020.2020.00010.

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Mirkalaei, Seyed Mousa Mousavi, David Tran, Vijay Shrivastava, et al. "New Approach for Stress Computation during Loading and Unloading in Modified Cam Clay Model." In International Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/igs-2022-177.

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Abstract Modified Cam-Clay model is often used for simulation of soft geomaterials such as soil or sand. In this model, Young’s modulus continuously changes via the bulk modulus. Poisson’s ratio can change or be kept constant. If the Poisson’s ratio is kept constant, shear modulus will change with time. If the shear modulus is kept constant, Poisson’s ratio is allowed to change with time. In general, the effective stress tensor at time t+1 can be computed when all state variables at time t are known. The material can be either in elastic or plastic mode depending on the stress state. In the ca

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Reports on the topic "Unloading path"

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A REEXAMINATION ON CALIBRATION OF CYCLIC CONSTITUTIVE MODEL FOR STRUCTURAL STEELS. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.267.

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Exquisite calibration of model parameter is crucial for simulation accuracy of cyclic constitutive model. This paper is aiming to clarify the influence of different calibration factors on the calibration results and simulation performances of Chaboche combined isotropic/kinematic hardening constitutive model. The influencing calibration factors include the definition of proof strength point on unloading-reloading path, the definition of unloading elastic modulus, the relative proportion of initial back stress and saturation back stress. Based upon different influencing factors, the Chaboche mo

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