Stress

Tensile Strength for a Bolt is determined by applying a Force along it long axis. Shear Strength for a Bolt is determined by applying a Force across its diameter, as it would be loaded in a lug joint. Tensile strength is strength in tension when pulling force is applied. And shear strength is strength against cutting force which is known as shear force.

In one sentence, stress is one of the main causes of depression. Being under stress causes many negative psychological reactions which lead to the depressive condition. The difference between a person who is not depressed and one who is depressed is that the person without depression are able to bounce back from the effects of the stressful situations once they have stopped. On the contrary, the depressed individual will continue to wallow in the negative emotions even once the stressors are no longer there. With stress as a contributing cause, it would be a stressor that was present over a prolonged period of time that would cause the depression.

Normal stress and shear stress

This setup is most commonly used in control valve http://www.answers.com/topic/actuator in high pressure http://www.answers.com/topic/pipeline-transport.

A localized compressive stress at the area of contact between two components which r not having relative motion between them, is known as crushing stress.

the average shear stress is 3/4 the maximum shear stress for a circular section

Tension stress tends to pull a material apart and acts normal to its cross section plane.

Shear stress tends to shear a material apart and acts in the plane of its cross section plane.

Crushing stress tends to push a material and acts normal to its cross section plane, in the opposite direction of tension. Crushing stresses are compressive stresses and could also be bearing stresses.

For a material laoded in pure tension, shear exists at 45 degrees along the cross section plane and is 1/2 the tensile value. For pure shear, tension exists 45 degrees along the cross section plane and is equal to the shear value.

Most all metals are stronger in tension than in shear, by a factor of about 1.7.

Some materials, like chalk or concrete, are stronger in shear than in tension. If loaded in shear, they will break intension 45 degrees along the cross section

The maximum stress in a ring under tension occurs at the point on the ring that is farthest from the center. This is because the force of the tension is distributed evenly around the circumference of the ring, and the points on the ring that are farthest from the center have to support more of the tension due to their greater distance from the center. As a result, the stress is highest at these points and decreases towards the center of the ring.

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An effect of all forces acting on a structure at the same time.

One of the reasons old people are so grumpy is because with all their age and wisdom, young ones don't listen to them. They feel upset and disrespected for that. Also their bodies and minds don't work the way it did when they were younger and that is also a cause of irritation. They have also seen so much of unnecessary tragedy in their lives which makes them upset. And the final reason is that they can get away with it.

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Selye developed the Three Stage Model of Stress Response. This model consisted of alarm, resistance, and exhaustion.

They would react with jealousy and hate. It would be an explosive situation for everyone. People with NPD are envious and competitive. They cannot admit when they're wrong. They think they are superior to and know more than everyone else. They brag about their imagined accomplishments and criticize everyone else. They are hypersensitive to any criticism, even friendly and constructive suggestions, and usually have anger management problems. They cannot appreciate the viewpoints of others. More than one in any group that must work together is a potentially explosive situation.

A job where hostility and abuse are "going on" would be unhealthy for everyone involved. Especially for people with NPD.

69 year old white male. Wgt. 250 lbs. 69". Post bilateral knee replacement. Slow recovery. Now doing treadmill, level, 3.5 - 17 min. mile, and other exercises. Have lost 110 lbs in 5.5 years. Would like to get down another 30 lbs. Increasing each month in exercise, home landscaping etc. Have a functional mitral value murmur. 55% functioning right side when I had bilateral knee replacement 11/04/07. Have had some mild discomfort doing treadmill faster forcing air flow, and bench press. Asked G.P. in Family Practice Clinic for referral for a Echo-cardo treadmill test. Lasted 2.5 minutes on inclining plane and increasing speed. Spiking P.V.C.'s followed by irregular heart rythm. Cardialogist said I had a malignant heart. There was no movement in Apex, and he had no idea if this was early damage or current and wanted me to do angio-gram. NOT quite ready to do this without further inquiry. Seems I had EKG Technitian, other attendants and Cardialogist concerned as they quickly got me off treadmill and back on bed to follow this change in heart rythm. I have another followup app't in two weeks with Cardialogist from OSU - second to head.

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is factor of safety of brittle material half of ductile material

Defense mechanisms are part of the unconscious. Therefore one cannot really control what mechanisms he/she uses.

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One of the best; or may be the best example of voluntary efforts in intellectual stress management, is the activity of wiki.answers.com. When more and more people work on it and with greater and greater involvement [with due care of eyes and due attention to physical exercise] the greater intellectual stress management would be experienced by them. In other words, asking questions and trying to answer questions is the best way of intellectual stress management. The provisional acceptance of a given solution or an answer and its verification is also very important for intellectual stress management. Blind acceptance and blind rejection are better to be avoided.

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