Processing-Scheme Design for Forming Curved Ship Plate and Analysis of Calculation Cases

Round 1

Reviewer 1 Report

Dear authors,

This manuscript proposes a novel methodology to plan forming process of curved metal plates by line heating.
The proposed method enables effective planning of process for three kinds of shapes including sail-type, saddle-type and curved plates with torsion, which are important for ship structures. This viewpoint makes this manuscript meet the scope of the journal, Marine Science and Engineering.
The methodology was well deliberated and described in detail by using a lot of figures such as a flowchart showing step-by-step procedure, and its feasibility was convincingly shown by a lot of results from thermo-mechanical finite element analyses, which makes this manuscript attractive for many readers in related fields. However, in my opinion, there are some points where revision is desirable before the manuscript is published as follows.

- section 2.1

The theoretical development here is interesting, but in my opinion, it does not seem to contribute to support necessity of "Basic amount of forming plasticity". I think that it is due to lack of quantitative discussions that relate the realistic plastic deformations to equations derived here, which are basically based on elastic constitutive equations. Because the whole manuscript is somewhat long, it would be better to shorten this section or completely omit it. I think that the effectiveness of "Basic amount of forming plasticity" can still be described without these equations.

- section 2.3.1

The results shown in this section were derived by thermo-mechanical finite element analysis. Therefore, the results are supposed to be dependent on mesh pattern, boundary condition and material properties. In my opinion, it is better to add a figure of the finite element model with description of boundary conditions. A table for thermo-mechanical material properties such as elastic moduli and coefficient of thermal expansion is also desirable. I think that this makes the results in this section more reliable.

-section 2.3.2

In figure 15(a) the stable plastic zone decreases first with increase of line energy, then it increases. Reason why this trend was observed is unclear to me. There is some explanation for this trend in line 376, but in my opinion, explanation of the reason for the trend is better to be added.

-section 5.

In my opinion, in addition to explaining what you did in this research, it is better to put an emphasis on benefit and good effect that can be obtained from this research. It is important to associate them to what you stated in the introduction, too. I think that those extra explanations will contribute to convince the readers of the conclusion.

 

Thank you for your attention.

Best regards,

Author Response

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Reviewer 2 Report

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Round 2

Reviewer 2 Report

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