Is Bone isotropic or anisotropic?
Anisotropic Characteristics Bone tissue -Is an anisotropic material, indicating that the bone behavior will change depending on the direction of the load application. In general, the bone tissue may lead to higher loads in the longitudinal direction and a lesser quantity of load when applied over the bone surface.
Why is bone stronger in compression than tension?
Both cortical bone and trabecular bone are stronger in compression than tension, which reflects the fact that the inorganic phase is stronger in compression than tension. The organic phase contributes to the ductility and toughness of the tissues. The latter is often referred to as the fracture toughness.
Is cortical bone isotropic?
Human cortical bone is usually considered to be transversely isotropic with mechanical properties substantially different in the longitudinal direction (parallel to the axis of the osteons) than in the radial or circumferential directions but it has similar properties in the radial and circumferential directions.
How does the structure of bone relate to its ability to withstand stress?
Cells and protein fibers are wrapped inside layers of hard mineral salts. Blood vessels and nerves bring needed nutrients and signals to the cells in this hard matrix. All of these structural components allow bone to withstand tremendous amounts of stress and protects the internal organs from damage and injury.
What type of stress is bone strongest in resisting?
Bones are stronger in resisting compression than in resisting tension and shear forces because when the forces in compression are going with the grain it is building its strength. With compression it allows the force to be absorbed.
What type of stress is bone weakest in resisting?
bones are weakest in resisting what kind of stress? tensile and compressive stress. load acts about long axis (at each end).
Why is bone density related to body weight?
Endocrine factors and body composition influence bone mineral density in obesity. Bone quality is compromised in obesity. Caloric restriction leads to changes in calcium metabolism, resulting in bone loss. Endocrine and other physiological changes during weight reduction regulate bone loss.
Which component of bone is primarily responsible for its tensile strength?
collagen fibers
Which stress is caused by a pull on the body acted upon?
Stress is a quantity that describes the magnitude of forces that cause deformation. Stress is generally defined as force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, we call such stress a tensile stress.
What are the 3 types of stress in geology?
There are three types of stress: compression, tension, and shear.
What is stress on a material?
Stress is the a measure of what the material feels from externally applied forces. Forces that are applied perpendicular to the cross section are normal stresses, while forces applied parallel to the cross section are shear stresses.
What is elasticity GPA?
The stress/strain ratio is referred to as the modulus of elasticity or Young’s Modulus. The units are those of stress, since strain has no units. Engineering materials frequently have a modulus of the order of 109Pa, which is usually expressed as GPa.
What is the value of modulus of elasticity?
Modulus =(σ2 – σ1) / (ε2 – ε1) where stress (σ) is force divided by the specimen’s cross-sectional area and strain (ε) is the change in length of the material divided by the material’s original gauge length.
What is meant by Poisson’s ratio?
Poisson’s ratio is defined as the ratio of the change in the width per unit width of a material, to the change in its length per unit length, as a result of strain.