"high specific stiffness" is a correct and usable phrase in written English.
It is often used in technical or scientific contexts to describe the stiffness of a material relative to its density. It is typically written as "specific stiffness" and can be used to compare different materials or discuss the properties of a single material. Example: "The carbon fiber used in the construction of the aircraft's wings has a high specific stiffness, making it lightweight yet incredibly strong."
Specifically, composites offers high specific stiffness and specific strength, low density, good fatigue resistance, outstanding corrosion resistance, excellent thermal insulation and low thermal expansion over many metal alloys.
Nanoclay dispersed polymer composites possess high specific stiffness and strength measured in-plane.
This is due to attractive mechanical properties such as high specific stiffness and high strength.
Sandwich structures are extensively used in engineering because of their high specific stiffness and strength.
The elastically-anisotropic octet truss lattice exhibits high specific stiffness due to its stretching-dominated mechanical behavior.
The use of fibre-reinforced polymers in civil construction applications originated structures with a high specific stiffness and strength.
One approach to satisfying this criterion is to exploit the high specific stiffnesses of polymeric fibrous composite laminates.
Substituting composites for the metallic structures has many advantages because of the higher specific stiffness and higher specific strength of the composite materials.
Substituting composite structures for conventional metallic structures has many advantages because of higher specific stiffness and higher specific strength of composite materials.
To improve the possibility of realizing the ambitious extremely large telescopes, materials with a higher specific stiffness and a lower coefficient of thermal expansion are needed.
In particular, their composites show higher specific stiffness than glass fibre composites in both tension and plate bending and only slightly lower values than carbon fibre composites in plate bending.
