Simple Stress and Strain
The strength of materials are expressed from the point of view of machine designer. A machine designer needs to know the properties of different materials so that he can select the most suitable material for each part of a machine. A machine designer uses his information of stress to make sure that the stress is reasonable and that each part of the machine is sufficiently strong. Strength of materials is the scientific area of applied mechanics for the study of the strength of engineering materials and their mechanical behavior in general (such as stress, deformation, strain and stress-strain relations). Strength is considered in terms of compressive strength, tensile strength, and shear strength, namely the limit states of compressive stress, tensile stress and shear stress respectively.
One can see the importance of stress and strain. They are an indication of how severely the part in machine is loaded and how it is a factor that determines whether the forces applied are reasonable. Stress and strain always occur together. When a material is subjected to stress, it deforms, and when a material is deformed there must be strain. If the stress and strain are not the same for all materials, then it is found by experiments There is a relation between the stress and the strain for any given material. It said, when the relationship between the two are given, the stress and the strain can be found in one another. All materials deform when subjected to stress and it is necessary to be able to calculate the deformation of a body under load, because in most cases the deformation is more momentous than the stress.
Stress is in all probability the most imperative word in the subject matter of strength of materials. Stress is defined as force per unit area. It has the same units as pressure, and in fact pressure is one special variety of stress. However, stress is a much more complex quantity than pressure because it varies both with direction and with the surface it acts on. The simple stress are: compression (stress that acts to shorten an object), tension (stress that acts to lengthen an object), and shear (stress that acts parallel to a surface). Shear can cause one object to slide over another. It also tends to deform originally rectangular objects into parallelograms. The most general definition is that shear acts to change the angles in an object.
What values do warriors abide by? There are universal similarities between all warrior codes, such as bravery and honor, but the specific distinctions vary according to the cultural values. These warrior codes have a big influence on the warrior ideologies in The Tain and Rama the Steadfast and ultimately determine their warrior practices. In The Tain, characters are very concerned with individual prowess and maintaining their reputation, whereas in Rama the Steadfast, their concern with pursuing their dharma leads them to justify the violent acts. Their warrior codes influence their ideologies and practices—characters are forced to face the consequences of the violent acts they are committing and as a result question their way of life.
The Warrior Ethos, by Steven Pressfield depicts the warrior’s mentality from ancient times to the present through a variety of different aspects and stories. In The Warrior Ethos, Pressfield states that men are not born with the certain qualities that make a good warrior, but instead are inculcated through years of training and indoctrination, stating at an early age. He shows how different societies have been able to instill the same or very similar ideals throughout history while maintaining their own unique characteristics. Things have changed from ancient Sparta, where parents would be enthusiastic about their children going to war, and even more elated upon learning they died valorous in battle. These days, most parents are a lot
This military is built upon a foundation of loyalty and trust, as one man must be able to trust his fellow soldiers with his life. Bravery is another key component in this military, any man is willing to risk his own life to save the lives of his comrades. The way these values
What is your idea of an honorable warrior? Would they be more like the knight or samurai class? In two different places, Europe and Japan, they formed a similar system where warriors get paid land for fighting and protecting Lords and Daimyos. These warriors are called samurai and knights. Historian believed that the two warriors were similar but the truth is the are very different. For the code of honor the samurai believed in what is called bushido while knight believed in chivalry. Both warrior fought with armor of course, however samurai fought in leather wear and knights fought in full plate armor.
Rigid body motion does not change the length of a vector joining the pair of points inside the body and has no concern with the strain analysis. When external forces are applied on an elastic body, the body undergoes deformation. Due to the elasticity of the body, there comes into play a force which resists the deformation. This force is called stress force. Clearly, the deformation of the body is accompanied by the stress force. In other words, stress and strain occur together in inelastic body. There are two types of elastic deformation: (i) Dilatation and (ii) Shear strain set up in the body in such a way that there is a change only in volume but no change in shape, is called dilatation. In the shear deformation, there is a change in the shape of the body without a change in its volume. Dilatations are further categorized into two kinds: compression, in which volume is reduced; and rarefaction, in which the volume is
Two qualities of the perfect hero fall into the same general category: prowess in battle and valiance. Along with the two, a hero must behave honorably, both on and off the battlefield. In addition to strength, honor in combat is an important part of being a warrior, and without valor and cour...
A profession must have the trust of the people it serves. This is gained through the use of an Ethic that is generated and policed by the profession itself. The Center for Army Profes...
Stress is the combination of psychological, physiological, and behavioral reactions. Most people have a response to events that challenge or threaten them. Stress good and bad. Good stress is called eustress.
Mechanical Engineering 130.2 (2008): 6 - 7. Academic Search Complete. Web. The Web. The Web.
Joining the military is not just a job or a path to a career, but a life style that requires dedication. The life style of a service member is not easy and is made up of many different characteristics which is known as the warrior society. Authoritarian structure, isolation and alienation, class system, parent absence, importance of mission, and preparation for disaster: war make up the culture aspects of the warrior society and will be discussed in further detail (Hall, 2008).
To begin, ADRP 1 states the individual ethic begins by creating, and sustaining a professional identity as a member of the Army team, which in turn, enhances the moral fiber of the entire enterprise. Next, the Army Ethic White Paper reminds its Soldiers that as Army professionals they perform their duty according to a common ethic , eluding to the deontological precepts of this philosophy. Moreover, the white paper states, that as the Army prepares to operate in complex environments, it must anticipate the unique ethical challenges of the future, and remain committed to developing Army professionals of character, competence, and commitment. Next in importance, the joint nature of future conflict requires a common framework for ethical conduct, just as joint doctrine provides for operations and planning. Due to the exceptional importance of understanding this concept, the Army Ethic illustrates the following:
Stress is the combination of psychological, physiological, and behavioral reactions that people have in response to events that threaten or challenge them. Stress can be good or bad. Sometimes, stress is helpful, providing people with the extra energy or alertness they need. Stress could give a runner the edge he or she needs to persevere in a marathon, for example. This good kind of stress is called eustress. Unfortunately, stress is often not helpful and can even be harmful when not managed effectively. Stress could make a salesperson buckle under the pressure while trying to make a sales pitch at an important business meeting, for example. Moreover, stress can increase the risk of developing health problems, such as cardiovascular disease and anxiety disorders. This bad kind of stress is called distress, the kind of stress that people usually are referring to when they use the word stress.
The four codes that a warrior lives by are "always to be the best and bravest and to be distinguished above others. To stand fast and firmly while in battle. To be a speaker of words and a doer of deeds. And the final code is to help one's friends, while harming one's enemy." The stereotypical warrior would be with prestige, which he must defend. A great warrior is goal oriented to the point of being narrow minded with the goal of becoming the best. A warrior's greatest fear is to fail, if a warrior fails he no longer has virtue or honor. A warrior must be ready at any given notice that an enemy wants to publicly humiliate him at anytime. A warrior is responsible for the close friends and family members he may have. The harsher and most barbaric way an enemy is able to slain his foe gives the warrior more prestige within his army. The more ridic...
First, stress is defined as an unpleasant state of emotional and physiological arousal that people experience in situations that they perceive as dangerous or threatening to their well being (Patel, 14). Stress is a universal feeling to everyone but the word stress means different things to different people. Some people define stress as events or situations that cause them to feel tension, pressure or negative emotions such as anxiety or anger (Patel, 15). Other people may view stress as a process involving a person’s interpretation and response to a threatening event. In any case, stress has many facets of how one perceives and responds to the certain predicament that is ailing them.
Hans Selye defined stress as “the non-specific response of the body to any demand for change.” He later defined it as “the rate of wear and tear on the body.” Stress can be good because the pressure placed on someone can motivate them to complete the tasks ahead of them. From this, small amounts of stress can be positive. However, long periods of stress wear the body down and begin to have negative effects on the body which could be long term.