Title

Research On The Distribution Of Tension In Notched Construction Parts

Date

1961

Index Abstract

Contrails and DTIC

Photo Quality

Incomplete

Report Number

WADD TR 60-906

Corporate Author

Technische Hochschule

Laboratory

Materials Central

Extent

76

Identifier

AD0262132

AD0262132

Access Rights

OTS

Distribution Classification

1

Contract

AF 61(514)-1111

DoD Project

7360

DoD Task

73605

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Report Availability

Full text available

Full text available

Date Issued

1961-01

Abstract

The influence of various factors (notch-radius, depth of notch, notch-angle, material) on the stress concentration of notched flat bars was investigated theoretically and experimentally. The aim of the research work was the extension and completion of the methods available for the calculation of stresses in notched structural elements.

For the by experimental determination of the strains and stresses mainly electrical strain gages were used; in addition to that measurements were made by means of the photoelastic stress-coat method.

In considered cases the elastic stress-concentration factors, and the stress distribution over the minimum cross section were evaluated theoretically and experimentally for the elastic range. For the plastic range a method was developed taking into consideration the real stress-strain curve of the material. This method allows the calculation of the stress concentration factor (which is known to decrease with increasing load) in dependence of the nominal stress in tension and bending. We have evaluated in this way the diagrams for 4 different materials (steel St. 00.12, St 00.21, pure Aluminum, and Aluminum alloy, "Velodur"), which show the SCF vs. the nominal stress. Numerous tests with notched specimens of these materials confirm the theory. In these tests in the plastic range the strain distribution over the minimum cross section was also determined. Further theoretical investigations concern the treatment of V-shaped notches and the influence of the notch-angle in pure shear.

Publisher

Wright-Patterson Air Force Base, OH : Wright Air Development Division, Air Research and Development Command, United States Air Force

Distribution Conflict

No

Provenance

IIT

Type

report

Subject

Measurement

Mechanics

Test Facilities

Aluminum

Aluminum Alloys

Deformation

Elastic Properties

Epoxy Resins

Mathematical Analysis

Photoelasticity

Plastic Coatings

Plastic Properties

Rods

Shear Stresses

Steel

Strain Gages

Stresses

Tensile Properties

Test Equipment

Test Methods

Theory

Format

1 online resource

Creator

Neuber, Ing H.