10 exasperating design flaws in everyday objects

Table Of Content

• Shockingly, People Aren’t Interested In Paying $3,500 For Apple’s Wildly Overpriced Vision Pro VR Headset
• Design Flaws to Avoid
• US bank notes all being the same size
• Impress Your Network With Professional Templates
• Kaiser Permanente notifies 13.4 million members of data breach. City of Hope also reported breach
• Column: Millions of Angelenos haven’t lived through a big quake. I have, and this is what it’s like

Friction stir welding of aluminium is now a mature and robust process, which is becoming increasingly well established in the fabrication of critical components. It is true to say that FSW has extended the use of welding in certain materials and applications, in particular in the welding of 2xxx and 7xxx alloys for the aerospace industry. The qualities making the process attractive include reduced cost, minimal repair requirement, good properties and total automation leading to a high level of consistency. Dalle Donne et al.[338] found that residual stress was by far the most important effect in their compact tension fatigue study in which fatigue crack propagation varied strongly as a function of R (maximum/minimum stress ratio).

People are only just noticing this hilarious Godzilla character design flaw - Creative Bloq

People are only just noticing this hilarious Godzilla character design flaw.

Posted: Mon, 22 Jan 2024 08:00:00 GMT [source]

Shockingly, People Aren’t Interested In Paying $3,500 For Apple’s Wildly Overpriced Vision Pro VR Headset

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Design Flaws to Avoid

That allowed the packets that got lost along the way to be re-sent repeatedly, perhaps along different paths, in search of a successful route to their destination. The system was down only briefly, but it was enough to upset Metcalfe — whose embarrassment turned to rage when he noticed that the AT&T executives, dressed in seemingly identical pinstriped suits, were laughing. Such issues were of little concern during the ARPANET era, when the dilemmas were related to building the network and demonstrating its value. It would have taken enormous foresight, said Virginia Tech historian Janet Abbate, for those planting these early seeds of the Internet to envision the security consequences years later, when it would take a central place in the world’s economy, culture and conflicts. Not only were there few obvious threats during the ARPANET era of the 1970s and early 1980s, but there also was little on that network worth stealing or even spying on.

US bank notes all being the same size

The process is by definition asymmetrical, as most of the deformed material is extruded past the retreating side of the tool. The process generates very high strains and strain rates, both of which are substantially higher than found in other solid state metalworking processes (extrusion, rolling, forging, etc.). Pitting, the removal of metal at localised sites, is a common corrosion mechanism in FSW Al alloys.

Impress Your Network With Professional Templates

If somebody holding a certain encryption key is a trusted correspondent, other messages created with that key are probably authentic. This is true even if the correspondent’s legal name is not used — or even necessarily known. The result is something like a vast system of pneumatic tubes capable of carrying anything that fits in a capsule to any destination on the network. The key — and this is how the Internet’s founders spent much of their time — was making sure that the network routed the packets correctly and kept track of which ones arrived safely.

When you stop and think about it, so many of the things we use every day just plain suck. [Warning, this subject gets people pretty riled up, so some images and videos contain expletives]. The authors are deeply indebted to many colleagues within the global FSW community for numerous direct and indirect contributions to this work, for making available micrographs and figures and for many useful discussions over the past few years. PJW is grateful to Dr Altenkirch and Dr Steuwer for assistance in providing some of the data presented.

Nor did they require the continuous steel reinforcement needed to keep its slabs intact during decades of service. But Dolan urged other California cities to work faster to address these fatal building flaws. Los Angeles, Santa Monica and West Hollywood have laws that cover retrofitting of both non-ductile concrete buildings as well as soft-story apartment buildings. A decade ago, San Francisco became one of the first cities to require retrofits of soft-story apartments.

Design flaw leaves Google Workspace vulnerable for takeover - Help Net Security

Design flaw leaves Google Workspace vulnerable for takeover.

Posted: Tue, 28 Nov 2023 08:00:00 GMT [source]

Find a design flaw in your customers’ existing processes

Consequently, overall elongation measurements made on cross-weld samples tend to be unrepresentative of any region of the weld and serve only to identify the likely failure location under static loading. In summary, both heat-treatable and non-heat-treatable alloys have marked variations in microstructure and hardness across FSWs. In the former the growth, dissolution and reprecipitation of strengthening precipitates across the welds must be accounted for, while loss of work hardening is important in the latter.

Column: Millions of Angelenos haven’t lived through a big quake. I have, and this is what it’s like

An early example of this technique is shown in Fig.4.[120] The threads on the leading edge were full and left intact, while on the trailing edge the upper threads are incomplete. The conditions that lead to formation of this void, and whether it has any relevance in producing a sound void free joint, remain open research questions. Almost all the major airframe manufacturers are investigating the use of FSW (alongside other welding processes such as laser welding) to replace many of the rivets in current structures. The first aircraft to make extensive use of FSW in its airframe, the Eclipse 500 business jet, has recently completed certification and is now in production.[92] In this aircraft, over 7300 fasteners (approximately 60% of the total) are replaced by 263 friction stir welds.

In agreement with others[340,341] they found that once residual stress was taken into account very little variation in fatigue performance was observed as a function of FSW process parameters. Residual stresses arise from the accumulation of misfit between the weld region and the remaining plate. There are a number of means by which the misfit, and hence the residual stresses, can be manipulated, e.g.

Kumagai et al.[364] found that for 7050 the fatigue strength was close to that of the base metal with fracture in the softer HAZ. Most friction stir welds in heat-treatable alloys, welded in the peak aged or overaged conditions (T6/T7 tempers), exhibit a characteristic hardness profile, as typified in Fig.23. The significant effect of post-weld natural aging for a 7075-T6 weld is illustrated in Fig.24.[178] In the HAZ, softening is observed, with a rapid drop in hardness as the TMAZ is approached.

They positioned themselves on the side of the little consumer and against the greedy bankers. As that AmericanExpress.com story explained, the Credit Union National Association reported hundreds of thousands of consumers opened new accounts at credit unions within weeks of the big banks’ new-fee announcements. Apple was the first company to package their consumer products fully charged and ready to use out of the box. It also forced other consumer-electronics companies to reflect on their own negligence. That’s why, as Fadell points out, today just about every battery-powered product is packaged fully charged. We've chosen 10 common design flaws to highlight in this article, listed in no particular order.

Bea said the repairs involved patching cracks and fissures with concrete, which provided little strength to resist the forces that it would bear. If the drain was plugged, then the spillway was being uplifted by a force of 1,000 pounds per square foot and pounded on the top by raging waters, Bea said. An important factor in the failure was that the drain near the failure point was likely plugged by roots growing from nearby trees and shrubs, based on photos that show no water exiting the drain outlet along the spillway’s vertical wall.

Checking the grade of roofing material and its suitability to the climate surrounding the house also is a good predictor of future problems. After World War II, a new housing type called the ranch developed out of designs by architects and developers such as Cliff May, Alfred Levitt and Frank Lloyd Wright. Lowering costs and combining living spaces led to floor plans with a central living area and rooms coming off of the main room by connecting hallways. When done well, there was an open flow of rooms one into another with windows and doors transitioning to the outside. However, when executed poorly, the interiors of ranch homes were built around lots of rectangles and squares. Ranch housing began as an appealing and modern way to live, but got a bad rap for popularizing long box houses that lack character.

Fueling that early work was the shared intellectual challenge of developing a technology many thought doomed to failure. Several Internet pioneers felt particular frustration with AT&T’s Bell telephone system, which they saw as a rigid, expensive, heavily regulated monopoly — everything they didn’t want their new computer network to be. Computers in that era were huge, costly behemoths that could fill a room and needed to serve multiple users at the same time. But logging on to them often required keeping expensive telephone lines open continuously even though there were long periods of silence between individual transmissions. But as the attack raged in November 1988, crashing thousands of machines and causing millions of dollars in damage, it became clear that the failure went beyond a single man. The worm was using the Internet’s essential nature — fast, open and frictionless — to deliver malicious code along computer lines designed to carry harmless files or e-mails.

In this respect it is worthwhile to make a distinction between flaws and defects, although the two terms are often used interchangeably within the literature. The usual distinction is that a flaw or imperfection is a feature that one would prefer not to be in the weld, but it may or may not compromise the integrity of the weld. If, after evaluation, the flaw is deemed unacceptable, then it becomes a defect. Flaws or discontinuities should be characterised as defects only when specific acceptance criteria, related to the engineering application, are exceeded, and the presence of the flaw compromises the integrity of the structure.