Cylinder Fatigue Design of Low-Speed, High-Torque Radial Piston Motor
Round 1
Reviewer 1 Report
Please see attached file.
Comments for author File: 
Comments.docx
Author Response
Response to Reviewer 1 Comments
Point 1: Although the title, materials and methods of the present paper are very interesting, however the main novelties of it are not clear for the reviewer. Authors are encouraged to add more comments on the novelties and main contributions of the present paper in Abstract and last paragraph of Introduction section.
Response 1: I have added the novelty and main contributions of this paper in the last paragraph of the Abstract and Introduction sections.
Point 2: What is application of the proposed method? Authors are suggested to provide some technical expressions on the application of the proposed method and needing to this new finding.
Response 2: I have added applications and requirements for proposing the method.
Point 3: The Introduction section is very briefly organized. The Introduction section should be improved using the papers on the related subjects such as: Renewable energy, 2021, 179, 517-527; Nano energy, 2022, doi: 10.1016/j.nanoen.2022.107431; Nano energy, 2022. doi: 10.1016/j.nanoen.2022.107448, Ocean eng, 2021, 221, 108508; J mater sci. Mater electronics, 2020, 31(16), 13344-13351; IEEE transac instrument measur, 2022, doi: 10.1109/TIM.2022.3178483.
Response 3: I have added suggested references to the article.
Point 4: All variables and component should be defined after first appearance in the paper.
Response 4: I've added variable and component definitions that first appeared in the paper.
Point 5: The font of equations is not compatible with other fonts inside the text.
Response 5: I have made modifications to the font.
Point 6: Authors are encouraged to add more details on the data and procedure for extraction of data provided in Table 9.
Response 6: I have added details of extracting the data in table 9.
Point 7: The discussion is not informative. It should be enriched with addition of some more important conclusions.
Response 7: I made a major revision to the discussion section.
Point 8: The results and discussion are very briefly organized. An extended result and discussion is required.
Response 8: I have expanded on the results and discussion.
Reviewer 2 Report
Reviewer comments:
Manuscript title: Cylinder Fatigue Design of Low Speed and High Torque Radial Piston Motor
The paper illustrates the possibility of replacement of composite materials traditional steel materials used in the production of mechanical structural components.
The paper is interesting, however before considering for considering it suitable for publication in the journal some suggestions should be incorporated in the manuscript.
Remarks:
1. English should and some typo mistakes should be removed.
2. Convergence study of FEmodel shoulde shown.
3. Accuracy of basic model should be verified.
4. Possible reason of obtained results should be included in manuscript.
5. In comparison study write possible reasons for the variation of results with reference to present work results.
6. Write conclusions pointwise.
7. Some recent works should be included in manuscript.
Static Analysis of Skew Functionally Graded Plate Using Novel Shear Deformation Theory. Materials 2022, 15, 1-20.
Dynamic response of angle ply laminates with uncertainties using MARS, ANN-PSO, GPR and ANFIS. Materials 2021; 14; 1-28.
Author Response
Response to Reviewer 2 Comments
Point 1: English should and some typo mistakes should be removed.
Response 1: I have carefully corrected the English errors.
Point 2: Convergence study of FEmodel shoulde shown.
Response 2: I have added a finite element model convergence study.
Point 3: Accuracy of basic model should be verified.
Response 3: The accuracy of the basic model was verified by finite element calculation.
Point 4: Possible reason of obtained results should be included in manuscript.
Response 4: I have added the reasons for getting the results to the paper.
Point 5: In comparison study write possible reasons for the variation of results with reference to present work results.
Response 5: I have added possible reasons for the change in results to the paper.
Point 6: Write conclusions pointwise.
Response 6: I have written the conclusion point by point.
Point 7: Some recent works should be included in manuscript.
Static Analysis of Skew Functionally Graded Plate Using Novel Shear Deformation Theory. Materials 2022, 15, 1-20.
Dynamic response of angle ply laminates with uncertainties using MARS, ANN-PSO, GPR and ANFIS. Materials 2021; 14; 1-28.
Response 7: I have added these references.
Reviewer 3 Report
This paper presents a study regarding the opportunity to use composite materials instead of traditional steel materials in the production of mechanical structural components for a low-speed, high-torque radial piston motor. In this regard, the fatigue performance of a hydraulic motor cylinder block made of three different materials: composite material, aluminum alloy, and steel, was investigated. The main results of some theoretical and numerical simulations, presented in this study, show that the hydraulic motor cylinder designed with composite materials has little difference in fatigue performance compared with traditional metal materials.
The conclusion is that the investigation results were presented in detail and the authors reported their discoveries. After analyzing the paper, the reviewer considers that the paper could be published in the Coatings journal.
Author Response
Response to Reviewer 3 Comments
Point 1: The conclusion is that the investigation results were presented in detail and the authors reported their discoveries. After analyzing the paper, the reviewer considers that the paper could be published in the Coatings journal.
Response 1: Thanks to the reviewer for accepting this manuscript.
Reviewer 4 Report
The manuscript presents a Cylinder Fatigue Design for Low Speed and High Torque Radial Piston Motor.
Traditional closed form approximate equations are used together with few finite element simulations, to carry out a preliminary design of the motor, considering three material alternatives.
Only some of the mechanical phenomena are accounted for (i.e. static stress and fatigue), but apparently all aspects concerning friction and fretting are disregarded (not even mentioned).
I suspect that the conclusions reached by the authors could be likely reversed accounting for durability of the interfaces.
No experimental test are presented.
Therefore, the manuscript scientific content and original contribution is quite low.
I suggest a major revision, in order to add relevant mechanical aspects (friction, fretting etc), emphasize the originality of the manuscript, and possibly, add some experimental evidences supporting the proposed conclusions.
Author Response
Response to Reviewer 4 Comments
Point 1: Only some of the mechanical phenomena are accounted for (i.e. static stress and fatigue), but apparently all aspects concerning friction and fretting are disregarded (not even mentioned).
Response 1: The research content of this paper is that composite materials can replace traditional metals in terms of fatigue, as for the friction and wear problems mentioned by experts, it is a very important research content, but this paper does not study this content. At present, the wear problem of the cylinder block has been started, and it is hoped that important results will be obtained before the paper is published.
Point 2: I suspect that the conclusions reached by the authors could be likely reversed accounting for durability of the interfaces.
Response 2: Maybe you're right in your suspicions, but I'm a firm believer in what I've learned from my research when it comes to overall cylinder fatigue.
Point 3: No experimental test are presented.
Response 3: This paper is the theoretical fatigue design of the composite motor cylinder, for the experimental test, the wear problem needs to be further considered, at this stage, it is impossible to design a reasonable experimental test plan, the test part is also the direction of my efforts in the future.
Point 4: Therefore, the manuscript scientific content and original contribution is quite low.
Response 4: I think this paper is of great significance in the study of fatigue design theory, and more factors need to be considered for the test, for example, in order to improve the wear resistance of the composite cylinder interface, it is necessary to add a special coating to the interface, these wear issues will be studied in the future.
Point 5: I suggest a major revision, in order to add relevant mechanical aspects (friction, fretting etc), emphasize the originality of the manuscript, and possibly, add some experimental evidences supporting the proposed conclusions.
Response 5: Thanks for the expert advice, I think the content of this paper is the fatigue design problem, I will continue to study the wear problem you suggested in the future, thank you again for your advice.
Round 2
Reviewer 1 Report
The revised paper is suggested for publication.
Reviewer 2 Report
IT may be published in its present form
Reviewer 4 Report
I am very happy that the authors are very confident about their experience in designing cylinders, but unfortunately such experience is not shared in the manuscript. No new theory is developed, also because no relevant experimental tests are carried out or analyzed in details. All the issues pointed out by the reviewer are postponed to future studies, experimental campaign and so on ….
In addition, the manuscript has not been revised, a part from minimal statement rephrasing.
Therefore, my strict suggestion is to postpone also the publication of the manuscript to the moment when all relevant informations (theoretical and experimental) will be available.
