A NEW METHOD OF REINFORCING A HOLE EFFECTING LARGE WEIGHT SAVINGS.

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Abstract:

A new method of reinforcing a hole in a flat plate under uniaxial tension is proposed in which the reinforcing material is present on the boundary of the hole only in the regions containing high stresses. Since the reinforcement is discontinuous, its amount, which varies along the arcs of the hole, is represented by a Fourier series in the analysis of the stresses. The stresses are determined by the use of two complex potential functions in series form. The series are truncated at the point whereafter any additional terms do not produce any significant change in the magnitude of the stresses. Numerical values are given for the case of a circular hole with various types of reinforcements. Finally, it is shown that this type of reinforcement can effect approximately 60 to 70 per cent savings in weight along with a 30 to 35 per cent savings in the welding and about 10 per cent reduction in the maximum stress as compared to the conventional all around reinforcement. Author

Author(s):
Dhir, Surendra K. ; Brock, Joseph S.
Author Organization(s):
NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER WASHINGTON D C
Descriptive Note:
Final rept.,
Supplementary Note:
Pub. in International Jnl. of Solids Structures, v6 p259-275 1970.
Pagination:
0023

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NSRDC-3362
Task Number(s):
1970
Project Number(s):
SR013-03-01
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*METAL PLATES, ORIFICES), (*ORIFICES, REINFORCING MATERIALS), STRESSES, LOADS(FORCES), GEOMETRIC FORMS, FOURIER ANALYSIS, SERIES(MATHEMATICS), WEIGHT, OPTIMIZATION
Field(s)/Group(s):
Structural Engineering and Building Technology
Report Date:
1970 May 01