CAJ | 학술논문

为了在有限元分析软件中模拟玉米秸秆粉料，建立了秸秆粉料的 D－P 材料本构模型，并通过三轴压缩试验确定了秸秆粉料的粘聚力及内摩擦角。在三维建模软件中建立了秸秆粉料和单模孔成型模具的简化分析模型，利用有限元分析软件中的热应力耦合分析来模拟秸秆粉料在模具模孔中被挤压的全过程。根据分析得到的玉米秸秆粉料模型被挤压后的变形及受力的规律，确定了秸秆粉料的变形特点、受力特点和时间－应变关系，并进行了试验验证，为模具的设计提供了依据。
위료재유한원분석연건중모의옥미갈간분료，건립료갈간분료적 D－P 재료본구모형，병통과삼축압축시험학정료갈간분료적점취력급내마찰각。재삼유건모연건중건립료갈간분료화단모공성형모구적간화분석모형，이용유한원분석연건중적열응력우합분석래모의갈간분료재모구모공중피제압적전과정。근거분석득도적옥미갈간분료모형피제압후적변형급수력적규률，학정료갈간분료적변형특점、수력특점화시간－응변관계，병진행료시험험증，위모구적설계제공료의거。
In order to simulate the corn stalk powder in the finite element analysis software , this article established the constitutive model of corn stalk powder which based on the D -P yield criteria , and the corn stalk powder ’ s cohesive force and it ’ s friction angle were got by triaxial compression tests .The simplified analysis model of corn stalk powder and single die hole mould was created in three-dimensional (3D) modeling software , and the thermal stress coupling analy-sis of this mould was done in the finite element analysis software to simulate the whole extrusion process of the corn stalk powder .According to the deformation and the force reaction and the fictional stress of this model , the deformation fea-tures and the mechanical characteristics of the corn stalk powder and the time -strain curve were determined and tested which provide foundations to the design of the mould .