Material Properties and Behavior
This property describes how much a material stretches before breaking.
Hardwood and softwood
What are the classifications of wood?
A structural material which consists of combining two or more constituents.
What is a composite?
The force applied to a material during testing.
What is load?
Charpy and Izod
What are some impact tests?
This type of behavior is fully reversibile (materials return to their original shape).
What is elasticity?
The protective layer between the bark and the wood.
What is the cambium?
Wood and bones
What are some examples of composites?
It states that a force exerted on or by a spring is directly proportional to the amount it is stretched or compressed, to the elastic limit.
What is Hooke's Law?
Measures the resistance of a material to penetration by a sharp object.
What is hardness test?
This value measures the slope of the elastic region.
What is Young's modulus?
Oak, ash, elm, maple, walnut, aspen
What are some hardwood species?
Composite materials which were traditionally used in aerospace industries.
What are advances composites?
It is the maximum stress that an object can take before the stress strain curve is no longer linear.
What is proportional limit?
Brinell, Rockwell, Shore.
What are some types of hardness tests?
This is the change in guage length divided by the original guage length.
What is percent elongation?
Parallel to the grain.
When is the tension is strongest?
Fiber and matrix.
What makes up a fiberous composite?
Raising the yield strength by permanently straining the material.
What is strain hardening?
Magnaflux, Radiography, Ultrasound, Liquid Penatrant
What are some types of NDT?
This property represents the total energy a material absorbs before fracture.
What is toughness?
A process by which lumber is sorted into classes.
What is stress grading?
Specific strength and stiffness
What is an advantage of composties?
The strain calculated using actual and not original dimensions, given by εt ln(l/l0).
What is true strain?
Hardness of materials typically measured using loads less than 2 N using such test as Knoop.
What is macrohardness?