Assessment in Screw Fixing Damages of Particleboard Surface: Difference in Screw Head and Self-Drilling Features

2013 ◽  
Vol 748 ◽  
pp. 331-335
Author(s):  
Falah Abu ◽  
Mansur Ahmad
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Housing Development ◽  
Insertion Technique ◽  
Screw Head ◽  
Pilot Hole ◽  
Screw Insertion ◽  
Kitchen Cabinet ◽  
Type Of Failure ◽  
Head Type

Construction of kitchen cabinet in Malaysia has grown in correspond to the increasing number of housing development. However, kitchen cabinet supplier is facing with major problem regarding to the increasing number of failure that occurred at the screw jointing during kitchen cabinet installation. Thus, the objective of the study is to observed the failure or damages during screw fixing on kitchen cabinet. It was observed that the screw head and driving features effect the number of damages and the failure mode type. Screw with pan-head type has the lowest number of damages compared with countersunk head screw. Selecting screw insertion technique is also important in order to reduce number of damages. Insertion technique with pilot-hole pre-drilling managed to reduce number of damages and type of failure modes occurred. With this paper, the kitchen cabinet manufacturer will be able to select the best screw with their preferable insertion technique in order to reduce the number of damages used for kitchen cabinet jointing.

Screw Fixing Fracture and Fatigue Failure on Particleboard Surface Using Different Style of Screw Insertion Technique

2014 ◽  
Vol 607 ◽  
pp. 454-457
Author(s):  
Falah Abu ◽  
Mansur Ahmad
Keyword(s):  
Fatigue Failure ◽  
Insertion Technique ◽  
Pilot Hole ◽  
Screw Insertion ◽  
Fracture Failure ◽  
Kitchen Cabinet

Particleboard jointing during screw fixing activities weakens the furniture, kitchen and household joinery. Screw jointing on the particleboard surface contribute to the particleboard fracture. Fracture on the particleboard surface will promote failure in jointing. This study was done to determine the effect of applying different style of screw insertion technique on fracture and fatigue failure. Three different style of screw insertion technique applied was self-drilling, pilot-hole and pilot-hole with countersunk (P+CSK) insertion technique. From the study, applications of P+CSK screw insertion technique caused highest number of damages. 57% of common chipboard screw samples were damaged when P+CSK screw insertion technique was used. Most fracture failure is the type 6 mode. There is no significance difference in number of damages for self-drilling insertion technique and pilot-hole insertion technique. Therefore, self-drilling insertion technique, which is the insertion technique used by kitchen cabinet installer was preferable due to the ease of handling during screw insertion.

Assessment on Screw Fixing Failure Mode for Kitchen Cabinet Particleboard

2012 ◽  
Vol 463-464 ◽  
pp. 577-581 ◽  
Author(s):  
Falah Abu ◽  
Mansur Ahmad
Keyword(s):  
Failure Mode ◽  
Screw Head ◽  
Screw Joint ◽  
Panel Surface ◽  
Kitchen Cabinet ◽  
Almost All ◽  
Screw Driving ◽  
Type Of Failure

An observation during screw fixing activities on kitchen cabinet installation was carried out. In collaboration with Signature Kitchen Ptd. Ltd., a kitchen cabinet manufacturer in Malaysia, twenty-eight (28) houses in Kelang Valley, Malaysia were selected for the study. Almost all of the sites selected have shown some damages of the particleboard during the screw fixing activities. Generally, there were cracks, chip-off or swelling occurred in between the panel surface and the screw head edges. The damages observed on the screw joint during installation are in the form of split holes, loose holes and delamination. All damages then were identified for its type of failure mode especially at the screw-driving slot and particleboard surface. Six type of failure mode were identified, documented and discussed.

scholarly journals DIRECT PEDICLE SCREW INSERTION PULLOUT STRENGTH

2021 ◽  
Vol 29 (4) ◽  
pp. 203-206
Author(s):  
RÔMULO PEDROZA PINHEIRO ◽  
ARIANE ZAMARIOLI ◽  
THIBAULT CHANDANSON ◽  
KERI GEORGE ◽  
ANTONIO CARLOS SHIMANO ◽  
...  
Keyword(s):  
Test Machine ◽  
Pullout Strength ◽  
Insertion Technique ◽  
Level Of Evidence ◽  
Surgical Guidance ◽  
Pilot Hole ◽  
Screw Insertion ◽  
Pullout Tests ◽  
Experimental Group

ABSTRACT Objective: Study the in vitro pullout strength of SpineGuard/Zavation Dynamic Surgical Guidance Z-Direct Screw (DSG Screw), a screw pedicle designed to be inserted using a direct insertion technique. Methods: DSG Screws of 5.5 mm and 6.5 mm were introduced into polyurethane blocks with a density of 10 PCF (0,16 g/cm3). According to the experimental group, screws were inserted without pilot hole, with pilot without tapping, undertapping and line-to-line tapping. Screw pullout tests were performed using a universal test machine after screw insertion into polyurethane blocks. Results: Screws inserted directly into the polyurethane blocks without pilot hole and tapping showed a statistically higher pullout strength. Insertion of the screw without tapping or with undertapping increases the pullout screw strength compared to line-to-line tapping. Conclusion: DSG Screw showed the highest pullout strength after its insertion without pilot hole and tapping. Level of Evidence V, Expert Opinion.

scholarly journals The Effect of the Lumbar Pedicle and Pediculo-Corporal Junction Histology on the Pedicle Screw Insertion Technique

2020 ◽  
Vol 8 (B) ◽  
pp. 177-180
Author(s):  
Murat Yilmaz ◽  
Beyza Alkis ◽  
Kemal Yucesoy
Keyword(s):  
Pedicle Screw ◽  
Pedicle Screws ◽  
Preparation Technique ◽  
Insertion Technique ◽  
Pilot Hole ◽  
Screw Insertion ◽  
Clinical Center ◽  
Spinal Segments ◽  
Lumbar Spinal ◽  
Lumbar Pedicle

Background Posterior lumbar pedicle screw instrumentation has gained a wide acceptance in the treatment of the various spinal lesions requiring fusion. Inserting screws into the pedicles take a great deal of skill, as the dense bony parts are not large, and a mistake could push a bone fragment into the spinal nerves, causing pain, loss of mobility and other damage. Aim: To investigate the histological and gross-anatomical properties of the pediculocorporal junction, which can have important clinical implications on the insertion technique of the pedicle screws. Study Design: This study was approved by the University Clinical Center Review Board. Human cadaveric lumbar spinal segments which were fixed with formaldehyde were used in the study. Methods: Twenty pedicles from 10 lumbar spinal segments (L3-L5) were prepared for histological and gross-anatomical investigation. Thin slice cuts were taken from the specimens and examined histologically and macroscopically. Results: There were not any differences in the histological characteristics of the pedicles and the pediculo-corporal junction. Thin compact osseous formation or web like connective tissue formation was not identifiable in the pediculo-corporal junction. Conclusion: All kind of pedicle screws can be attempted to be inserted just after preparation of the insertion point with an awl or just decortication of the entrance point with a rongeur. This can also reduce the pilot hole preparation technique related complications like perforation of the pedicle walls.  

Combine Nanoprobing Technique with Difference Analysis to Identify Nonvisual Failures

2006 ◽  
Author(s):  
Cha-Ming Shen ◽  
Tsan-Cheng Chuang ◽  
Jie-Fei Chang ◽  
Jin-Hong Chou
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Electrical Characteristic ◽  
The Novel ◽  
Difference Analysis ◽  
Original Idea ◽  
Deductive Method ◽  
Complete Measurement

Abstract This paper presents a novel deductive methodology, which is accomplished by applying difference analysis to nano-probing technique. In order to prove the novel methodology, the specimens with 90nm process and soft failures were chosen for the experiment. The objective is to overcome the difficulty in detecting non-visual, erratic, and complex failure modes. And the original idea of this deductive method is based on the complete measurement of electrical characteristic by nano-probing and difference analysis. The capability to distinguish erratic and invisible defect was proven, even when the compound and complicated failure mode resulted in a puzzling characteristic.

Case Study and Fault Modeling for Wrong Redundancy Evaluation on DRAM Devices

2007 ◽  
Author(s):  
Martin Versen ◽  
Dorina Diaconescu ◽  
Jerome Touzel
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Fault Modeling ◽  
Mode Analysis ◽  
Root Cause ◽  
Failure Mode Analysis

Abstract The characterization of failure modes of DRAM is often straight forward if array related hard failures with specific addresses for localization are concerned. The paper presents a case study of a bitline oriented failure mode connected to a redundancy evaluation in the DRAM periphery. The failure mode analysis and fault modeling focus both on the root-cause and on the test aspects of the problem.

Methodology for Analysis of Schottky Diode Failures

2010 ◽  
Author(s):  
Bhanu P. Sood ◽  
Michael Pecht ◽  
John Miker ◽  
Tom Wanek
Keyword(s):  
Failure Mode ◽  
Schottky Diode ◽  
Failure Modes ◽  
Schottky Diodes ◽  
Failure Mechanisms ◽  
Forward Voltage ◽  
Fast Switching ◽  
Voltage Drops ◽  
The Common

Abstract Schottky diodes are semiconductor switching devices with low forward voltage drops and very fast switching speeds. This paper provides an overview of the common failure modes in Schottky diodes and corresponding failure mechanisms associated with each failure mode. Results of material level evaluation on diodes and packages as well as manufacturing and assembly processes are analyzed to identify a set of possible failure sites with associated failure modes, mechanisms, and causes. A case study is then presented to illustrate the application of a systematic FMMEA methodology to the analysis of a specific failure in a Schottky diode package.

Failure mode and effect analysis (FMEA) to improve collaborative project-based learning: Case study of a Study and Research Path in mechanical engineering

2021 ◽  
pp. 030641902199904
Author(s):  
Elena Bartolomé ◽  
Paula Benítez
Keyword(s):  
Active Learning ◽  
Failure Mode ◽  
Mechanical Engineering ◽  
Failure Modes ◽  
Collaborative Study ◽  
Project Based Learning ◽  
Educational Process ◽  
Effect Analysis ◽  
Questions And Answers

Failure Mode and Effect Analysis (FMEA) is a powerful quality tool, widely used in industry, for the identification of failure modes, their effects and causes. In this work, we investigated the utility of FMEA in the education field to improve active learning processes. In our case study, the FMEA principles were adapted to assess the risk of failures in a Mechanical Engineering course on “Theory of Machines and Mechanisms” conducted through a project-based, collaborative “Study and Research Path (SRP)” methodology. The SRP is an active learning instruction format which is initiated by a generating question that leads to a sequence of derived questions and answers, and combines moments of study and inquiry. By applying the FMEA, the teaching team was able to identify the most critical failures of the process, and implement corrective actions to improve the SRP in the subsequent year. Thus, our work shows that FMEA represents a simple tool of risk assesment which can serve to identify criticality in educational process, and improve the quality of active learning.

Fuzzy risk assessment for electro-optical target tracker

2016 ◽  
Vol 33 (6) ◽  
pp. 830-851 ◽  
Author(s):  
Soumen Kumar Roy ◽  
A K Sarkar ◽  
Biswajit Mahanty
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Linear Equations ◽  
Mode Analysis ◽  
Failure Behavior ◽  
Membership Functions ◽  
Design And Development ◽  
Effect Analysis ◽  
Content Type ◽  
Criticality Analysis

Purpose – The purpose of this paper is to evolve a guideline for scientists and development engineers to the failure behavior of electro-optical target tracker system (EOTTS) using fuzzy methodology leading to success of short-range homing guided missile (SRHGM) in which this critical subsystems is exploited. Design/methodology/approach – Technology index (TI) and fuzzy failure mode effect analysis (FMEA) are used to build an integrated framework to facilitate the system technology assessment and failure modes. Failure mode analysis is carried out for the system using data gathered from technical experts involved in design and realization of the EOTTS. In order to circumvent the limitations of the traditional failure mode effects and criticality analysis (FMECA), fuzzy FMCEA is adopted for the prioritization of the risks. FMEA parameters – severity, occurrence and detection are fuzzifed with suitable membership functions. These membership functions are used to define failure modes. Open source linear programming solver is used to solve linear equations. Findings – It is found that EOTTS has the highest TI among the major technologies used in the SRHGM. Fuzzy risk priority numbers (FRPN) for all important failure modes of the EOTTS are calculated and the failure modes are ranked to arrive at important monitoring points during design and development of the weapon system. Originality/value – This paper integrates the use of TI, fuzzy logic and experts’ database with FMEA toward assisting the scientists and engineers while conducting failure mode and effect analysis to prioritize failures toward taking corrective measure during the design and development of EOTTS.

Seismic assessment of reinforced concrete columns with short lap splices

2021 ◽  
pp. 875529302199483
Author(s):  
Eyitayo A Opabola ◽  
Kenneth J Elwood
Keyword(s):  
Reinforced Concrete ◽  
Failure Mode ◽  
Failure Modes ◽  
Concrete Columns ◽  
Seismic Assessment ◽  
Rc Columns ◽  
Lap Splices ◽  
Displacement Response ◽  
Force Displacement ◽  
Probable Failure

Existing reinforced concrete (RC) columns with short splices in older-type frame structures are prone to either a shear or bond mechanism. Experimental results have shown that the force–displacement response of columns exhibiting these failure modes are different from flexure-critical columns and typically have lower deformation capacity. This article presents a failure mode-based approach for seismic assessment of RC columns with short splices. In this approach, first, the probable failure mode of the component is evaluated. Subsequently, based on the failure mode, the force–displacement response of the component can be predicted. In this article, recommendations are proposed for evaluating the probable failure mode, elastic rotation, drift at lateral failure, and drift at axial failure for columns with short splices experiencing shear, flexure, or bond failures.

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