Fabric by tester dull color. gives degrees operation and simple calculation out the fabric of bending height, bending rigidity, bending modulus. Standard: ERT 50-2 ASTM D1388 bs3356.
An optimization design method for bending rigidity of main shaft for large wind turbines
Followly, the bending rigidity and transverse shearing rigidity of one-way bamboo-stripe laminates applied to shipbuilding has been measured practically with this method.
The end product is six times lighter than steel, five to six times lower in density, two times harder and has13 times higher bending rigidity.
In bending failure test pieces, after crack chemistry grouting, the bending rigidity slightly has increased, but the limit load-carrying capacity has no obvious variety.
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