Aspect Ratio and Loading Effects on a Cracked Rectangular Tension Specimen Made from a Linear Elastic Material
Abstract
Finite element calculations are performed to determine the effect of specimen aspect ratio (specimen height (h) divided by specimen width (w)) on the specimen geometry stress intensity correction factor (F = square roots of JE/(sigma square roots of pi alpha)) (where J is the J -integral, E is Young's modulus, sigma is the remote force divided by the uncracked area, and alpha is the crack length). F is a function of specimen geometry, and modifies the value of the Mode 1 stress intensity (K1). Linear elastic fracture mechanics (LEFM) and plane stress are assumed. Two specimen types are simulated, center cracked tension (CCT), and single edge notched tension (SENT). Two boundary conditions are simulated, prescribed uniform load, and prescribed uniform displacement. For each of the four combinations of specimen type and boundary condition, an estimate is made of the minimum value of h/w for which the effect on F can be neglected, in which case F can be calculated using an equation instead of from a numerical analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 27, 1998
- Accession Number
- ADA397973
Entities
People
- Chun Ting Liu
- D. T. Baron
Organizations
- Air Force Research Laboratory