Stiffness

However the geometry of how the given load is placed onto the material is important as well, based on the tension and bending properties of the given material. Material Stiffness is the Young’s Modulus of a material, therefore the how much loads the material would resist before elastic deformation. For example: For the component stiffness of Timber, the Timber generally has more stiffness when it is placed on the ‘edge on’, since the deflection is smaller, usually of: 3mm at 1KN of load, this may be because this side of the timber is thicker which can also contribute to the stiffness of the material. Whereas if the timber were placed on a ‘flat face’ then the deflection would be: 58mm at 1KN load. This is due to the geometry of how the Timber is positioned, because when a Timber beam is placed on ‘Flat face’ the distance between the top face and bottom face is smaller, therefore the Young’s Modulus in Bending is notably lower and is more prone to higher deflection. Compared to the ‘edge on’ side of the Timber, which is stiffer and the deflection is…

alcohol abuse could potentially lead to cardiovascular problems in the future. In this news article, alcohol consumption is an environmental factor, and arterial stiffness is the developmental outcome. This news article is based on the research ‘Twenty-five-year alcohol consumption trajectories and their association with arterial aging: A prospective cohort study’ by Darragh O'Neill, Annie Britton, Eric Brunner, and Steven Bell. Cardiovascular problems continue to have the highest mortality…

Have you ever experience waking up with a stiffness or/and pain in the neck? For me, that's been an everyday routine that I have to go through in the morning. Most people will think that the pain will go away later or it's not going to affect the daily life, but not only it affects our daily life, but, it could also lead to health problems. First, the stiffness in the neck and the shoulder makes me unable to seat in one position for a long time. This eventually gives me a hard time when I have…

Degenerative joint disease (Osteoarthritis) is a breakdown of cartilage inside a joint. Common symptoms of Osteoarthritis are stiffness, pain and joint dysfunction (Better Health Channel, 2016, para. 5). Glucosamine is an effective treatment for Osteoarthritis (Arthritis Research, 2005, para. 3). The double-blind randomized clinical trial (RCT) conducted by Hamid Reza Arti and Mohammad Ebrahim Azemi in 2012 drew attention to Alendronate. Alendronate is known to have healing properties and…

The arteries are blood vessels that deliver oxygen and nutrients to all organs in the body during the heart pulses. During the blood circulation a pressure is exerted on the walls of the blood vessels or arteries. The case where the ability of such walls to expand or contract in response to blood pressure changes is called Arterial Stiffness (AS). Arteries need to be flexible to expand when oxygen is needed by muscles and heart, and stiffening of the arteries place an extra load on heart which…

arteries creating differences between the systolic and diastolic pressure. This pressure is known as pressure pulse (PP) the difference is calculated by subtracting the diastolic pressure from the systolic pressure. There are two factors that may impact the PP, the stroke volume and the elasticity of the arterial system. Loss of arteries elasticity result in decreased response to the normal stimuli for dilation or constriction of the vessels to meet the tissues needs (Karch, 2013). The PP…

ABSTRACT Introduction: Elastography is considered a non-invasive imaging modality which determines the tumors according to their stiffness (elasticity). Strain images representing the relative stiffness of lesions in comparison to the stiffness of surrounding normal tissue as malignant tumors tend to be stiffer than the normal tissue, which results in under compression. Purpose: To prospectively evaluate the sensitivity and specificity of the real-time sonoelastography together with B-mode US…

In younger subjects, arterial stiffness increases from central to peripheral arteries. However, the stiffness of central arteries such as the carotid and aortic arteries, increase with age1,2,3; peripheral arteries such as the radial and femoral arteries, stiffen little with age1,3. In younger subjects, retrograde waves travel back to the heart arrive during diastole1. As subjects age, the retrograde waves arrive at the heart during systole (which increases systolic pressure)1, since they are…

bar applied the load at the H-points (situated at the seat fixtures of in the top of the rocker) with gradual increments, until it reaches the maximum load. For each grade, the amount of deflection is recorded on a load-deflection graph. To confirm the maximum load which the body is not deformed permanently loading and unloading cycles are conducted during the test. The slope of the curve in the load-deflection graph will be as a result, the stiffness of the body (Malen 2011 p.124). Figure 44:…

In the adult patient with a distal radius fracture, the event that resulted in a fracture may also have created a high level of strain to the wrist capsular ligaments, and may have resulted in sprain injuries to one or more of those ligaments. The six week period of immobilization is consistent with a prolonged low stress/activity level for the capsular ligaments of the wrist which results in decreased cross-sectional area, decreased stiffness and decreased strength of the ligaments.3 Removal of…