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The article analyzes the deformation mechanism under uniaxial compression of cylindrical samples cut from the pulp of potato tuber. In its typical S-shaped stress-strain diagram, three characteristic zones of different types of dominant deformation can be distinguished. Clarified the boundary between the second and third zones. The rationale for changing the type of deformations in each zone by adding a new type to the previous one is presented. Grounded elastic deformation in the first zone, which is associated with stretching of the cell membranes. In the second zone, the destruction of individual cells distributed in the sample volume occurs and in the third zone — the predominant gradual unification of these destructions. An explanation is given of the characteristic brittle fracture of the sample with significant residual deformations at the end of the third zone. The erroneous determination of the deformations of the second and third zones as plastic (yield) was noted. In this regard, a new term was introduced — modulus of rigidity Z. The change in the modulus of stiffness Z with increasing irreversible deformations indicates structural changes in the flesh of the sample due to its gradually collapsing cell structure. The reason for straightening diagrams for samples from fresh, hard potato tubers is explained. Taking into account the type of deformations by zones allows us to reasonably proceed to the creation of criteria for quantitative assessments of the degree of flaccidity of potato tubers.

About the Authors

V. G. Zhukov
All-Russian research Institute for Starch Products — Branch of V.M. Gorbatov Federal Research Center for Food Systems of RAS
Russian Federation

Valery G. Zhukov — doctor of technical sciences, Chief Researcher 

140051, Moscow region, Kraskovo, ul. Nekrasov, 11, Tel.: +7–495–557–15–00

N. D. Lukin
All-Russian research Institute for Starch Products — Branch of V.M. Gorbatov Federal Research Center for Food Systems of RAS
Russian Federation

Nikolay D. Lukin — doctor of technical sciences, Acting Director 

140051, Moscow region, Kraskovo, ul. Nekrasov, 11, Tel.: +7–495–557–15–00


1. Andreev, N.R. (1980). Research and development of potato impact crusher for starch production. Author’s abstract of the dissertation for the scientific degree of Candidate of Technical Sciences. Moscow, MTIMMP, 26 p. (in Russian).

2. Abbott, J.A. (1999). Quality measurement of fruits and vegetables. Postharvest Biology and Technology, 15(3), 207–225. DOI: 10.1016/S0925– 5214(98)00086–6

3. Bentini, M., Caprara, C., Martelli, R.. (2009). Physico-mechanical properties of potato tubers during cold storage. Biosystems Engineering, 104(1), 25–32. DOI: 10.1016/j.biosystemseng.2009.03.007

4. Canet, W., Alvarez, M.D., Gil, M J. (2007). Fracture behaviour of potato samples (cv. Desiree) under uniaxial compression. Journal of Food Engineering, 82(4), 427–435. DOI:10.1016/j.jfoodeng.2007.02.054

5. Beer, F.P., Russell, J.Jr., Dewolf, J.T., Mazurek, D.F. (2012). Mechanics of Materials. Sixth edition. Published by McGraw Hill. Sсіеnce.— 388 p. ISBN00733802889780073380285.

6. Azam, M.M., Essia, A.H.A. (2015). Comprehensive Evaluation of Dynamic Impact as a Measure of Pjnfnj Quality. International Journal of Food Engineering and Technology, 1(1), 1–10.

7. Blahovec, J. (2001). Static mechanics and texture of fruits and vegetables. Research in Agricultural Engineering, 47(4), 144–169.

8. Blahovec, J., Vlckova, M., Paprstein, F. (2002). Static low-level bruising in pears. Research in Agricultural Engineering, 48(2), 41–46.

9. Shah, L.B.M. (2016). Instrumental and Ultrasonic Techniques in Quality Evaluation of Fresh Fruit and Vegetables. Submitted in accordance with the requirements for the degree of Doctor of Philosophy. The University of Leeds. School of Food Science and Nutrition.

10. Paoletti, F., Moneta, E., Bertone, A., Sinesio, F. (1993). Mechanical Properties and Sensory Evaluation of Selected Apple Cultivars. LWT — Food Science and Technology, 26(3), 264–270. DOI: 10.1006/fstl.1993.1055

11. Zhukov, V.G., Andreev, N.R., Bezrukov, D.V. (2016). Relaxation Effect at Testing Potato Samples by Compression. Achievements of Science and Technology of AIC, 30(11), 121–122. (in Russian)

12. Zhukov, V.G., Andreev, N.R., Lukin, N.D. (2017). Deformation Mechanism by Compression of Cylindrical Samples from Potato Tubers. Achievements of Science and Technology of AIC, 31(6), 80–83. (in Russian)

13. Laza, M. (1999). Mechanical properties affecting slicing performance of potatoes. Thesis Submitted to the Facuity of Graduate Studies In Partial Fulfillment of the Requirements for the Degrtt of Master of Science. Food Science Departmerit University of Manitoba, Winnipeg, Manitoba.

14. Oey, M.L., Vanstreels, E., De Baerdemaeker, J., Tijskens, E., Ramon, H., Hertog, M.L.A.T.M., Nicolaï, B. (2007). Effect of turgor on micromechanical and structural properties of apple tissue: A quantitative analysis. Postharvest Biology and Technology, 44 (3), 240–247. DOI:10.1016/j.postharvbio.2006.12.015

15. Zhukov, V.G., Andreev, N.R., Lukin, N.D. (2019). Peculiarities of potato flesh sample deformation by uniaxial compression. Norwegian Journal of development of the International Science, 26(2), 3–5.

16. Savrasova, N.R. (2012). Results of experimental definition of the module of elasticity and strength of a tuber of a potato. VESTNIC ChSAA, 60, 80–82. (in Russian)

17. Blahovec, Jiří, Sobotka, J. (2007). Potato tuber permittivity during deformation in compression. Research in Agricultural Engineering, 53(3), 79–84. DOI:10.17221/2124-rae

18. Chizhikova, T.V. (1982) Machines for grinding meat and meat products. M, Light and food industry.— 302. (in Russian)

19. Zhukov, V.G. (2012). Mechanics. Strength of materials. Krasnodar-S-PbM., Lan.— 414 p. ISBN978–5–8114–1244–0 (in Russian)


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