Cfrgtkky

I can't figure out why some of the cells of this table are not correctly centered. Attached the source code. Thanks!

begin{table}

    centering

    caption{My caption}

    label{my-label}

    resizebox{textwidth}{!}{%

        begin{tabular}{@{}llc@{}}

            toprule

            multicolumn{1}{c}{Known facts} & multicolumn{1}{c}{Open questions} & Objectives \ midrule

            begin{tabular}[c]{@{}l@{}}The resistance to matrix cracking depends on\ ply-thickness (also known as in-situ effect)end{tabular} & begin{tabular}[c]{@{}l@{}}There is no evidence of the in-situ effect under\ out-of-plane shearend{tabular} & multirow{4}{*}{A} \

            multirow{3}{*}{begin{tabular}[c]{@{}l@{}}\\Out-of-plane (``transverse'') shear loads involve \ shear cracks and delaminationend{tabular}} & begin{tabular}[c]{@{}l@{}}There is controversy about which damage \ mechanism triggers the otherend{tabular} &  \

            & begin{tabular}[c]{@{}l@{}}There is controversy about which damage \ mechanism   penalizes  the  load-carrying\ capacityend{tabular} &  \

            & begin{tabular}[c]{@{}l@{}}There is no clear evidence of how ply-thickness\ affects the damage sequenceend{tabular} &  \ midrule

            begin{tabular}[c]{@{}l@{}}Thin-plies increase certain in-plane properties \ because of the in-situ effectend{tabular} & multirow{2}{*}{begin{tabular}[c]{@{}l@{}}There is little evidence of how thin-plies \ respond to low-velocity impact loading\ (particularly true for thin laminates)end{tabular}} & multirow{2}{*}{B} \

            Thin-plies display brittle failure mechanisms &  &  \ midrule

            begin{tabular}[c]{@{}l@{}}Interleaving polyamide non-woven veils may \ enhance the impact resistance, tolerance and \ interlaminar fracture toughnessend{tabular} & begin{tabular}[c]{@{}l@{}}Few studies connect the microstructure and the \ properties of interleaved systemsend{tabular} & multirow{2}{*}{C} \

            begin{tabular}[c]{@{}l@{}}The improvement comes with a penalty of\ certain in-plane propertiesend{tabular} & Few studies incorporate light non-woven veils &  \ bottomrule

        end{tabular}%

    }

end{table}

I'd advise against the usage of adjustbox in order to make the table fit into the textwidth. Also, you don't need all the nested tables and manual linebreaks if you use a tabularx environment as shown in the following example:

documentclass{article}

usepackage{geometry}

usepackage{booktabs}

usepackage{multirow}

usepackage{tabularx}

begin{document}



begin{table}

    centering 

    caption{My caption}

    label{my-label}



        begin{tabularx}{textwidth}{@{}XXc@{}}

            toprule

            multicolumn{1}{c}{Known facts} & multicolumn{1}{c}{Open questions} & Objectives \ midrule

            The resistance to matrix cracking depends on ply-thickness (also known as in-situ effect) & There is no evidence of the in-situ effect under out-of-plane shear & multirow{10}{*}{A} \

             & There is controversy about which damage mechanism triggers the other &  \

           Out-of-plane (``transverse'') shear loads involve  shear cracks and delamination & There is controversy about which damage  mechanism   penalizes  the  load-carrying capacity &  \

            & There is no clear evidence of how ply-thickness affects the damage sequence &  \ midrule

            Thin-plies increase certain in-plane properties  because of the in-situ effect & multirow{4}{=}{There is little evidence of how thin-plies  respond to low-velocity impact loading (particularly true for thin laminates)} & multirow{4}{*}{B} \

            Thin-plies display brittle failure mechanisms &  &  \ midrule

            Interleaving polyamide non-woven veils may  enhance the impact resistance, tolerance and  interlaminar fracture toughness & Few studies connect the microstructure and the  properties of interleaved systems & multirow{5}{*}{C} \

           The improvement comes with a penalty of certain in-plane properties & Few studies incorporate light non-woven veils &  \ bottomrule

        end{tabularx}%



end{table}



end{document}

A commonly used convention in tables is that blanks mean repetition of the same entry in a given column, until countermanded by another value.

With the proposed setting, it would be rather difficult to understand what a paragraph in the left column refers to in the center column and similarly for the objective's code.

documentclass{article}

usepackage{booktabs}

usepackage{tabularx}



begin{document}



begin{table}[htp]

centering 



caption{My caption}

label{my-label}



small



begin{tabularx}{textwidth}{@{}XXc@{}}

toprule

multicolumn{1}{c}{Known facts} & multicolumn{1}{c}{Open questions} & Objectives \

midrule

The resistance to matrix cracking depends on ply-thickness (also known as in-situ effect)

& There is no evidence of the in-situ effect under out-of-plane shear

& A

\ addlinespace

Out-of-plane (``transverse'') shear loads involve  shear cracks and delamination

& There is controversy about which damage mechanism triggers the otherpar

  There is controversy about which damage  mechanism penalizes the load-carrying capacitypar

  There is no clear evidence of how ply-thickness affects the damage sequence

\

midrule

Thin-plies increase certain in-plane properties  because of the in-situ effectpar

Thin-plies display brittle failure mechanisms

& There is little evidence of how thin-plies respond to low-velocity impact loading 

  (particularly true for thin laminates)

& B

\

midrule

Interleaving polyamide non-woven veils may  enhance the impact resistance, tolerance and

interlaminar fracture toughness

& Few studies connect the microstructure and the properties of interleaved systems

& C

\ addlinespace

The improvement comes with a penalty of certain in-plane properties

& Few studies incorporate light non-woven veils

\

bottomrule

end{tabularx}



end{table}



end{document}

In this realization, the horizontal rules will make clear that “A” refers to everything in the first block, which might not be so evident if “A” is moved down, next to the long text in the second part.

It could be even clearer if the objectives are set at the left:

documentclass{article}

usepackage{booktabs}

usepackage{tabularx}



begin{document}



begin{table}[htp]

centering 



caption{My caption}

label{my-label}



small



begin{tabularx}{textwidth}{@{}cXX@{}}

toprule

Objectives & multicolumn{1}{c}{Known facts} & multicolumn{1}{c}{Open questions} \

midrule

A

& The resistance to matrix cracking depends on ply-thickness (also known as in-situ effect)

& There is no evidence of the in-situ effect under out-of-plane shear

\ addlinespace

& Out-of-plane (``transverse'') shear loads involve  shear cracks and delamination

& There is controversy about which damage mechanism triggers the otherpar

  There is controversy about which damage  mechanism penalizes the load-carrying capacitypar

  There is no clear evidence of how ply-thickness affects the damage sequence

\

midrule

B

& Thin-plies increase certain in-plane properties  because of the in-situ effectpar

  Thin-plies display brittle failure mechanisms

& There is little evidence of how thin-plies respond to low-velocity impact loading 

  (particularly true for thin laminates)

\

midrule

C

& Interleaving polyamide non-woven veils may  enhance the impact resistance, tolerance and

  interlaminar fracture toughness

& Few studies connect the microstructure and the properties of interleaved systems

\ addlinespace

& The improvement comes with a penalty of certain in-plane properties

& Few studies incorporate light non-woven veils

\

bottomrule

end{tabularx}



end{table}



end{document}