Technologic Papers of the Bureau of Standards Volume 152-169 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ...block. HI. DATA AND RESULTS OBTAINED 1. PHYSICAL TESTS (c) Tens1le Strength.--The results of the tens1le-strength tests, expressed in pounds per square inch, are shown graphically in Figs. 5,6, and 7. Each individual curve of the graphs represents I Fig. S---Variation of tensile strength in pounds per square inch over the side for samples A and B the values obtained from four blocks running from the backbone edge to the belly edge. The values for the tensile strength, in pounds per inch of width, are shown graphically in Figs. 8, 9, and 10. For that portion of any side represented by blocks 1 to 28, inclusive, the strength is generally greater on the backbone edge, decreasing in value toward a point near the belly edge, beyond FlO. 6.--Variation of tensile strength in pounds per square inch over the side for samples CandD which it generally increases to either an equal or greater value than occurred on the backbone. That portion of the sides represented by blocks 29 to 40, inclusive, is the shoulder area. The strength in that part is more irregular than in the other portion, but has a general tendency to be greater at the backbone edge 162023--20 2 and to decrease steadily to the belly edge. A glance at Figs 8, 9, and 10 will show that the average tensile strength, in pounds per inch of width, for any given section of four blocks across a side is generally low at the butt end, increasing in value up to locations 17 to 20, or about half the length of the side, then decreasing in value, ending with the first shoulder section 29 to 32, I. Fig. 7.--Variation of lensile strength in pounds per square inch over the side for samples E and F where it is lowest, and then slightly increasing in value again for the remaining two sections. This same variation applies to...