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.

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.

Comparative assessment of various root canal sealer for failure mode after obturation; An in vitro study

2020 ◽  
Vol 11 (4) ◽  
pp. 7994-7998
Author(s):  
Manoj Chandak ◽  
Richa Modi ◽  
Aditya Patel ◽  
Pooja Chandak ◽  
Madhulika Chandak ◽  
...  
Keyword(s):  
Failure Mode ◽  
Root Canal ◽  
In Vitro Study ◽  
Surface Characteristics ◽  
Anatomical Variations ◽  
Ah Plus ◽  
Root Dentin ◽  
Chemical Solutions ◽  
Type Of Failure

Success of root canal treatment depends upon five major steps. Among them, biomechanical preparation is most important. Root canal system shows various anatomical variations. These variations will help microorganism to harbour themselves. In order to disinfect the root canal, various irrigating solutions are used. These chemical solutions may change the surface characteristics of root dentin. Hence, this study was carried out with an aim- to determine the failure mode of sealer after obturation using the various irrigating solution.  The study was carried out using 40 extracted premolars. Biomechanical preparation was done using the crown down technique. Various irrigating solutions, namely, 5.25% sodium hypochlorite. 2% chlorhexidine gluconate, QMIX 2 in1, 17% EDTA liquid were used for irrigation. Later obturation was done using AH plus sealer and cold condensation technique. A section of 5mm root was obtained at the middle one third. Push out bond strength was evaluated and the mode of failure of the sealer was noted.  The maximum number of mixed failure mode (n=7) in Qmix 2 in1as well as in 2% CHX. Similarly, in 5.25% NaOCl, 8 samples showed Mixed failure mode. However, in 17% EDTA, the equal number of the sample had Adhesive and Mixed type of failure mode (n=5). Use of EDTA + CHX or QMix during final irrigation significantly improved sealer penetratin resulting in impervious seal to the obturation. Thus contributing to the success of endodontic treatment.

Fluorosilicate Glass (FSG) Outgassing Induced Aluminum Bond Pad Corrosion during Post-Fab Wafer Storage

2012 ◽  
Author(s):  
Hua Younan ◽  
Nistala Ramesh Rao ◽  
Chen Shuting
Keyword(s):  
Failure Analysis ◽  
Failure Mode ◽  
Subsequent Removal ◽  
Left Behind ◽  
Gas Chemistry ◽  
Type Of Failure

Abstract A case study of Fluorine (F)-outgassing is presented in this paper that caused the corrosion of Aluminum bond pad. It will be shown that the source of F-contamination is not the typical residue left behind after the passivation etch with Fluorine-based gas chemistry and the subsequent removal of the etch polymer generated with solvent (chemical) clean. Rather, it is introduced as a result of F-outgas over a period of time from the intermetallic dielectric (IMD) film, fluorosilicate glass (FSG), during the post-fab wafer storage. The methodology used in our failure analysis (FA) lab to identify and characterize this type of failure mode is presented in the paper.

scholarly journals Shear strength model and prediction of failure mode for multi-spiral column

2021 ◽  
Vol 15 (3) ◽  
pp. 13-29
Author(s):  
Ngo Si Huy ◽  
Nguyen Ngoc Tan ◽  
Mai Thi Hong
Keyword(s):  
Shear Strength ◽  
Failure Mode ◽  
Shear Failure ◽  
Concrete Columns ◽  
Computational Method ◽  
Compression Depth ◽  
Proposed Model ◽  
Crack Angle ◽  
The Moment ◽  
Type Of Failure

The damage of reinforced concrete columns due to shear is often serious, so this type of failure should be avoided from the design. In this paper, a model derived based on the discrete computational method is proposed to calculate the shear strength of column carried by multi-spiral transverse reinforcement, accounting for the effect of compression depth. Furthermore, based on this model, a method is proposed to predict the failure mode of multi-spiral columns. The test database of multi-spiral columns from previous studies is used to validate both the shear strength and failure mode predictions. The proposed model with a crack angle of 40 degrees gives the best estimation of the shear strength of multi-spiral columns, and the proposed method predicts well the failure mode of these columns. To avoid shear failure, the ratio of the minimum shear strength calculated from the proposed model with a crack angle of 40 degrees to the shear force based on the moment-curvature analysis is suggested to be larger than 1.2.

Alternative Curing Methods for FCOB Underfill

1999 ◽  
Vol 121 (4) ◽  
pp. 249-254 ◽  
Author(s):  
M. M. Merton ◽  
C. P. Malhotra ◽  
N. Nikmanesh ◽  
R. L. Mahajan
Keyword(s):  
Heat Transfer ◽  
Failure Mode ◽  
Flip Chip ◽  
Failure Mechanisms ◽  
Vapor Condensation ◽  
Hot Air ◽  
Curing Methods ◽  
Liquid Immersion ◽  
Solder Fatigue ◽  
Almost All

This paper explores the use of liquid immersion and vapor condensation curing as alternatives to conventional hot air oven curing of flip chip on board underfill. Heat transfer results suggest that both the liquid immersion and vapor condensation heating result in reduced cure times due to higher heat transfer results associated with these two techniques. Preliminary reliability studies Suggest that the two proposed rapid curing methods do not result in any increased failure rates or different failure mechanisms. In almost all the samples the failure mode was delamination of the underfill followed by solder fatigue failure.

scholarly journals MANAJEMEN RISIKO KEHILANGAN PANEN EDAMAME (Glycine max (L) Merr.) DI PT. MITRATANI DUA TUJUH, JEMBER

2020 ◽  
Vol 14 (02) ◽  
pp. 165
Author(s):  
Yuli Wibowo ◽  
Winda Amilia ◽  
Dyah Rizki Karismasari
Keyword(s):  
Failure Mode ◽  
Control Strategy ◽  
Analytical Hierarchy Process ◽  
Effect Analysis ◽  
Post Harvest ◽  
Pests And Diseases ◽  
Fishbone Diagram ◽  
Almost All ◽  
Post Harvest Loss ◽  
Hierarchy Process

Post-harvest loss is a risk that can be faced by almost all agricultural commodities, including edamame. Post-harvest loss can be a potential loss for farming. This study aims to identify the risk of edamame post-harvest loss at PT. Mitra Tani Dua Tujuh Jember, as well as formulating its control strategy. This study uses the Failure Mode and Effect Analysis method to analyze the risk of post-harvest loss, integrated with the fishbone diagram to identify the risk causes. To formulate a risk control strategy used the Analytical Hierarchy Process method, which refers to the Pugh method to determine the strategic concept. The results showed that the most critical risks that need serious attention in edamame production are the emergence of pests and diseases. Pests and diseases that attack edamame plants have a high impact severity. Pests and diseases quite often attack edamame plants, and their presence is difficult to detect. The appropriate strategy for controlling pests and diseases in edamame is vegetable pesticides. The use of vegetable pesticides is easier, more efficient, cheaper, more effective, and easier to obtain than chemical pesticides. Keywords: analytical hierarchy process, edamame, failure mode and effect analysis, post-harvest loss, risk management

Habitat Association of Klebsiella Species

1985 ◽  
Vol 6 (2) ◽  
pp. 52-58 ◽  
Author(s):  
Susan T. Bagley
Keyword(s):  
Drinking Water ◽  
Gastrointestinal Tract ◽  
Surface Waters ◽  
Industrial Effluents ◽  
Opportunistic Pathogen ◽  
Habitat Associations ◽  
Habitat Association ◽  
Klebsiella Species ◽  
Almost All ◽  
Polluted Waters

AbstractThe genus Klebsiella is seemingly ubiquitous in terms of its habitat associations. Klebsiella is a common opportunistic pathogen for humans and other animals, as well as being resident or transient flora (particularly in the gastrointestinal tract). Other habitats include sewage, drinking water, soils, surface waters, industrial effluents, and vegetation. Until recently, almost all these Klebsiella have been identified as one species, ie, K. pneumoniae. However, phenotypic and genotypic studies have shown that “K. pneumoniae” actually consists of at least four species, all with distinct characteristics and habitats. General habitat associations of Klebsiella species are as follows: K. pneumoniae—humans, animals, sewage, and polluted waters and soils; K. oxytoca—frequent association with most habitats; K. terrigena— unpolluted surface waters and soils, drinking water, and vegetation; K. planticola—sewage, polluted surface waters, soils, and vegetation; and K. ozaenae/K. rhinoscleromatis—infrequently detected (primarily with humans).

SEM Cold Stage Techniques for the Observation of Vegetative and Floral Apices of Oat (Avena sativa L.) Plants

1977 ◽  
Vol 35 ◽  
pp. 590-591
Author(s):  
B. K. Kirchoff ◽  
L.F. Allard ◽  
W.C. Bigelow
Keyword(s):  
Critical Point ◽  
Avena Sativa ◽  
Substantial Improvement ◽  
Fresh Tissue ◽  
Cold Stage ◽  
Critical Point Drying ◽  
Almost All ◽  
Cell Collapse ◽  
Conductive Paint ◽  
Carbon Based

In attempting to use the SEM to investigate the transition from the vegetative to the floral state in oat (Avena sativa L.) it was discovered that the procedures of fixation and critical point drying (CPD), and fresh tissue examination of the specimens gave unsatisfactory results. In most cases, by using these techniques, cells of the tissue were collapsed or otherwise visibly distorted. Figure 1 shows the results of fixation with 4.5% formaldehyde-gluteraldehyde followed by CPD. Almost all cellular detail has been obscured by the resulting shrinkage distortions. The larger cracks seen on the left of the picture may be due to dissection damage, rather than CPD. The results of observation of fresh tissue are seen in Fig. 2. Although there is a substantial improvement over CPD, some cell collapse still occurs.Due to these difficulties, it was decided to experiment with cold stage techniques. The specimens to be observed were dissected out and attached to the sample stub using a carbon based conductive paint in acetone.

Electron microscopy studies of plasma-sprayed materials

1983 ◽  
Vol 41 ◽  
pp. 70-71
Author(s):  
K.R. Subramanian ◽  
A.H. King ◽  
H. Herman
Keyword(s):  
Plasma Spraying ◽  
Substrate Surface ◽  
Flame Temperature ◽  
Ceramic Coatings ◽  
Metallic Substrates ◽  
Hot Plasma ◽  
Almost All ◽  
Plasma Sprayed ◽  
Hostile Environments ◽  
Plasma Spraying Process

Plasma spraying is a technique which is used to apply coatings to metallic substrates for a variety of purposes, including hardfacing, corrosion resistance and thermal barrier applications. Almost all of the applications of this somewhat esoteric fabrication technique involve materials in hostile environments and the integrity of the coatings is of paramount importance: the effects of process variables on such properties as adhesive strength, cohesive strength and hardness of the substrate/coating system, however, are poorly understood.Briefly, the plasma spraying process involves forming a hot plasma jet with a maximum flame temperature of approximately 20,000K and a gas velocity of about 40m/s. Into this jet the coating material is injected, in powder form, so it is heated and projected at the substrate surface. Relatively thick metallic or ceramic coatings may be speedily built up using this technique.

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