Effect of Road Vibrations on the Mechanical Properties of Olive Fruit During Transport

Karimi, Davood; Rashvand, Mahdi; Shokrian, Ashkan

doi:10.11648/j.ajma.20190702.13

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…The olive crop is considered one of the main crops in the Middle East. In the olive harvest and post-harvest operations, engineering theories and concepts were used to reach a high-quality product; fruits and oil (Leone et al, 2015;Beghi et al, 2017;Tamborrino et al, 2017;Aiello et al, 2019;Cappelli et al, 2019;Karimi et al, 2019). Harvesting is considered a crucial operation in the production of the olive crop.…”

Section: Introductionmentioning

confidence: 99%

Improving olive mechanical harvesting using appropriate natural frequency

Alzoheiry

GHONİMY

Rahman

et al. 2020

J Agricult Engineer

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The good performance of olive mechanical harvesting by shaking depends on the suitable values of limb vibrator operating parameters (frequency and amplitude). Mathematical models of a single degree of freedom (S.D.F.M) and two degrees of freedom (T.D.F.M) were used to estimate the natural frequency (FN) of olive fruit stem system. The results from these models indicated that the FN values were 33.9, 31.9, and 28.0 Hz for the full mature stage, half-ripe olive, and full-ripe olive respectively. Branch vibrator was operated at three levels of frequency 25, 30 and 35 Hz and 3 levels of amplitude 25, 30 and 35 mm at a vibration time of 10 s. Measurements covered the fruit removal percentage (FRP) and degree of full-ripe fruit selectivity (DS). The results showed that the maximum FRP value, 90.6%, was achieved at a frequency of 35 Hz and amplitude of 25 mm while the maximum DS value, 78.58%, was obtained at 25 Hz frequency and 25 mm amplitude.

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Section: Introductionmentioning

confidence: 99%

Improving olive mechanical harvesting using appropriate natural frequency

Alzoheiry

GHONİMY

Rahman

et al. 2020

J Agricult Engineer

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“…Figure 6 h–j shows the four cycles of Isc for the MSSAS in vibration environments of 3 m/s 2 , 8 m/s 2 and 13 m/s 2 , respectively. The different works have unique advantages and application scenarios in terms of energy harvesting or the particular performance of a sensor [ 37 , 38 , 39 , 40 , 41 ]. In this paper, the MSSAS has a good balance of sensitivity, linearity and range, as well as energy harvesting capability ( Table S1 ).…”

Section: Resultsmentioning

confidence: 99%

Self-Powered Acceleration Sensor Based on Multilayer Suspension Structure and TPU-RTV Film for Vibration Monitoring

Han

Zhang

et al. 2021

Nanomaterials

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In this paper, we designed a triboelectric acceleration sensor with excellent multiple parameters. To more easily detect weak vibrations, the sensor was founded on a multilayer suspension structure. To effectively improve the electrical properties of the sensor, a surface roughening and internal doping friction film, which was refined with a room temperature vulcanized silicone rubber (RTV) and some thermoplastic polyurethanes (TPU) powder in a certain proportion, was integrated into the structure. It was found that the optimization of the RTV film increases the open circuit voltage and short circuit current of the triboelectric nanogenerator (TENG) by 223% and 227%, respectively. When the external vibration acceleration is less than 4 m/s2, the sensitivity and linearity are 1.996 V/(m/s2) and 0.999, respectively. Additionally, when it is in the range between 4 m/s2 and 15 m/s2, those are 23.082 V/(m/s2) and 0.975, respectively. Furthermore, the sensor was placed in a simulated truck vibration environment, and its self-powered monitoring ability validated by experiments in real time. The results show that the designed sensor has strong practical value in the field of monitoring mechanical vibration acceleration.

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“…In general, cracking force is the main parameter for C. oleifera fruits mechanical property, influenced by factors such as fruit size, internal structure, and moisture content (Khadivi‐Khub, 2015). COS mechanical properties are being studied for industrial applications, such as evaluating fatigue damage and fracture forms (Karimi et al, 2019). Nuts mechanical characteristics are studied, nuts varieties are compared (Sesana et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Experimental and FEM research on Camellia oleifera shell structural–mechanical cracking behavior during hulling

Yang,

Wang,

Cui

et al. 2024

J Food Process Engineering

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Camellia oleifera shell (COS) mechanical–structural property and cracking behavior are crucial for hulling, hulling work can improve the extraction oil quality. A developed texture analyzer with in situ observation is built for COS mechanical–structural and crack testing. Influencing factors are studied under working effects, considering fruit size, drying temperature, compression distance, speed, directions. The shell compression damage is analyzed with compression damage model. Results show that COS compression damage can be divided into three stages: shell elastic deformation, initial cracking, crack propagation. Compression force decreases rapidly after initial cracking, increases with cracking propagation. Compression direction leads different cracking, cracking load Fx > Fy. Shell cracking force increases with increasing compression speed, distance, fruit diameter, leading intensified crack. Cracking force decreased with drying temperature increasing in 20–110°C, obvious at 80°C. FEM simulation matches COS cracking behavior, stress concentration increases at apical. The research provides theoretical basis for hulling design.Practical applicationsCamellia oleifera shell (COS) mechanical–structural property and cracking behavior were crucial for shelling, hulling work improves the extraction oil quality. COS cracking behavior were studied under various working effects such as fruit size, drying temperature, compression distance, speed, and direction, and providing a theoretical basis for improving hulling methods. Based on the actual hulling process, research on temperature factors has been added, and the conclusion that the optimal drying temperature is 80°C has been proposed. Considering energy conservation and tea oil quality, hulling efficiency has been improved. Meanwhile, cracking behavior and mechanical properties were studied from cracking in three stages, preventing excessive extrusion caused to seeds damage in hulling. The research provides theoretical basis for hulling design and optimization.

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Effect of Road Vibrations on the Mechanical Properties of Olive Fruit During Transport

Cited by 3 publications

References 12 publications

Improving olive mechanical harvesting using appropriate natural frequency

Improving olive mechanical harvesting using appropriate natural frequency

Self-Powered Acceleration Sensor Based on Multilayer Suspension Structure and TPU-RTV Film for Vibration Monitoring

Experimental and FEM research on Camellia oleifera shell structural–mechanical cracking behavior during hulling

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