Hi Narendra,

It is difficult to know how many number of contours ( number of outlines or perimeters) will affect the tensile strength. Because it depends on the combination of other process parameters.  In my research,  I have investigated in depth the effect of number of contours on dynamic mechanical thermal properties.  From my experience, I think maximum number of contours (10 contours) will improve the overall mechanical properties significantly, because it reduces the number of rasters, therefore, micro-voids will be decreased.  But  10 contours has a negative effect on the dimensional accuracy, build time and material consumption. Please read my publications which can be found in my page via Research Gate.

Hi Narendra,

I'd consider two factors here: (1)- The quantity and volume of voids that decrease due to increase  in no. of contours and (2)-Increase in the probability of delamination due to increase in no. of contours. Therefore to me, this should be an optimization problem rather than one having direct relation between the two.

Hi Omar and Saket,

Thank you for the answer, I understand the quantity of the voids decreases with increase the number of the contours. Due to this fact, I have already mentioned in my question that tensile strength is increasing with rising contours.  I concluded one thing about the negative influence of contours on the elongation, is the slight increment in the young modulus. I observed the results; modulus is increasing and leaving the negative impact on the elongation. 

 Hi Narendra,

The answers of Omar and Saket are more appropriate to your question. The more number of contours will increase the strength hence modulus increases

Hi Narendra,

According to this paper

http://link.springer.com/article/10.1007/s11665-016-2157-6

"increasing the number of contours from its lowest level to highest level would result in a significant increase in the storage modulus, loss modulus, and mechanical damping"

They tested 1 and 10 contours.

Hope it will help.

Renan

Hi Renan, 

This paper I have already studied. Omar Ahmed Mohamed , One of the author of this aritcle already added first answer to this question. Please see the first answer of Omar. By the way thanks for your answer.