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Reed is a kind of important natural resources. The inherent mechanical properties of reed stalk are the basis for development of its production equipment. As the research on the basic mechanical properties of reed stalk is still in blank both at home and abroad, this paper makes the compression, tensile, and bending experiments respectively on the bottom reed stalk in the harvest time with an electronic universal testing machine, obtains the corresponding stress-strain curves under the compression, tensile, and bending loads, and confirms that the mean compression strength is 2.69 MPa, the mean compression elasticity modulus is 75.52 MPa, the mean tensile strength is 16.45 MPa, the tensile elasticity modulus is 433.19 MPa, the mean bending strength is 2.15 MPa, and the mean fracture deflection is 5.54 mm. The experimental results may provide a reference for the development and parameter optimization of the reed production equipment.

In order to accurately predict the flow behavior of the TC11 titanium, the uniaxial compressive tests of TC11 titanium alloy were carried out by Gleeble-1500 thermal simulator with the temperature in the range of 900∼1050°C, and the strain rate of 0.1∼10s−1. Then the particle swarm optimization (PSO) was used to optimize the parameters of the least square support vector machine (LSSVM) model, and a high-temperature constitutive model of TC11 titanium alloy based on PSO-LSSVM was established, and the average relative error between the predicted value and the experimental value of the established constitutive model based on PSO-LSSVM is 1.51%, and the correlation coefficient is 0.997. The established constitutive model can accurately predict the high temperature flow behavior of TC11 titanium alloy. This indicated that a new method for establishing the constitutive model is provided.