A common lateral force resisting system for cold-formed steel (CFS) buildings consists of shear walls sheathed with oriented strand board (OSB). Previous experimental and computational research on CFS shear walls, as well as those with other framing materials, has demonstrated that the complex interaction of the fasteners with the sheathing is an important factor in the nonlinear behavior of th...

ADVANCED MATERIALS & PROCESSES • AUGUST 2014 18 F asteners play a critical role in engineered structures as a method of nonpermanent joining for the aerospace, infrastructure, civil, automotive, energy generation/distribution, and many other industries. Fastener failures can lead to disastrous consequences and substantial financial losses. One of the most common fastener failure modes is fatigu...

BACKGROUND/AIMS To determine the prevalence and time-course of t-fastener migration after gastropexy deployment. METHODS We reviewed our procedural database for all percutaneous gastrostomy and gastrojejunostomy tube insertions performed over a 14-month period using a widely accepted t-fastener kit for gastropexy (Kimberly-Clark). Of 201 patients, 71 (41 males, 30 females; mean age, 56 years)...

Missing fastener detection is a critical task due to its similar characteristics with surrounding environments. In this paper, a machine vision based fully automatic detection and classification of missing fastener detection system is proposed using Support Vector Machine (SVM) classifier. This proposed system consists of preprocessing, transformation, feature extraction and classifications. Im...

The ®nite element alternating method is extended further for analyzing multiple arbitrarily curved cracks in an isotropic plate under plane stress loading. The required analytical solution for an arbitrarily curved crack in an in®nite isotropic plate is obtained by solving the integral equations formulated by Cheung and Chen (1987a, b). With the proposed method several example problems are solv...

The work that I'm going to describe was funded by the Air Force Materials Lab from February 1972 to February 1974. It is described in an AFML report, TR74-80, available from the Air Force. This report describes a more practical type of problem than has been discussed so far. Our work was directed towards building an ultrasonic system to be used on aircraft in the field to detect cracks around f...

This paper presents a numerical investigation using the two-parameter fracture mechanics approach for studying threaded fastener geometries. It was found that the constraint arising from the presence of a surface crack in a threaded fastener does influence the stress in the forward sector. Consequently, the actual stress field shows a deviation from the theoretical HRR solution. Implementation ...

The objective of this paper is to provide the stiffness and strength characteristics for coldformed steel stud walls stabilized by sheathing. The primary stability resistance is provided by translational (lateral) stiffness supplied at the fastener locations to the cold-formed steel studs. This paper separates the source of this translational stiffness into two parts: local and diaphragm. To an...